Dynamic evolution of canine parvovirus in Thailand

Research (Published online: 10-02-2020)

4. Dynamic evolution of canine parvovirus in Thailand

N. Inthong, S. Kaewmongkol, N. Meekhanon, K. Sirinarumitr and T. Sirinarumitr

Veterinary World, 13(2): 245-255

ABSTRACT

Background and Aim: According to the previous study, the circulating canine parvovirus (CPV) in Thailand is 2a and 2b. Nowadays, CPV mutants, including CPV-2c, have been identified in many parts of the world. This study aimed to investigate the genetic diversity of the circulating CPV in Thailand.

Materials and Methods: Eighty-five CPV-positive fecal samples were obtained from dogs with either acute hemorrhagic diarrhea or diarrhea. The complete VP2 gene of these samples was amplified using VP2 specific primers and polymerase chain reaction (PCR). The obtained full-length VP2 sequences were analyzed and a phylogenetic tree was constructed.

Results: Sixty and 25 CPV-positive fecal samples were collected in 2010 and 2018, respectively. Thirty-four samples were new CPV-2a and 31 samples were new CPV-2b due to amino acids substitution at position 297 (Ser-Ala). In 2018, 5 new CPV-2a, 19 CPV-2c, and 1 feline panleukopenia virus (FPV) were found, but no new CPV-2b was detected. Moreover, most of the CPV in this study had amino acids mutations at positions 324 and 440. The phylogenetic construction demonstrated the close relationship between the current new CPV-2a with the previous CPV-2a reported from Thailand, China, Uruguay, Vietnam, Singapore, and India. Interestingly, the current new CPV-2b in this study was not closely related to the previous CPV-2b reported in Thailand. The CPV-2c in this study was closer to Asian CPV-2c and further from either European or South America CPV-2c. Interestingly, FPV was identified in a diarrhea dog.

Conclusion: The evolution of CPV in Thailand is very dynamic. Thus, it is important to monitor for CPV mutants and especially the clinical signs relating to these mutants to conduct surveillance for the emergence of new highly pathogenic CPV in the future.

Keywords: canine parvoviruses, diversity, Thailand, VP2 gene.

Influence of interferon-based drugs on immunological indices in specific prevention

Research (Published online: 10-02-2020)

3. Influence of interferon-based drugs on immunological indices in specific prevention

Alfia Andreeva, Oksana Nikolaeva, Oleg Altynbekov, Chulpan Galieva and Kseniia Ilina

Veterinary World, 13(2): 238-244

ABSTRACT

Aim: The research aimed to study the effect of interferon (IFN)-based drugs on the behavior of immunological parameters in calves during the specific prevention of associative infections.

Materials and Methods: The object of research was 45 black motley cows and their calves from birth to 2 months of life. Serum and colostrum samples were screened for antibodies against Rotavirus, diarrhea, and coronavirus using serological methods. The testing was performed before vaccination, 40 days before calving, 20 days before calving, and before calving. Colostrum samples were taken during the first milk yield. Serum samples from calves were drawn before colostrum feeding as well as at 7, 14, and 21 days, and 1 and 2 months of age. To measure the level of immunoglobulins A, M, and G, additional serum samples were collected from calves at 25, 35, 65, and 75 days after birth.

Results: Giving pregnant cows, an IFN-based drug at a dose of 1 ml/kg 48 h before vaccination results in the development and accumulation of antibodies to Rotavirus, coronavirus, and viral diarrhea (VD) in the colostrum, with a titer of 7.6±0.3 log2, 5.8±0.34 log2, and 4.4±0.18 log2, respectively. It indicates an increase in the antigenic activity of the multivalent vaccine.

Conclusion: IFN-based drugs enhance the protective effect of vaccination against associative infections in the newborn calves. They stimulate a rise in the titer of antibodies to Rotavirus, coronavirus, VD, and mucosal disease complex as well as an increase in immunoglobulins A, M, and G.

Keywords: antibody titer, coronavirus, immunoglobulins A, M, and G, interferon, Rotavirus, vaccinations.

Blastocystis spp. subtype 10 infected beef cattle in Kamal and Socah, Bangkalan, Madura, Indonesia

Research (Published online: 07-02-2020)

2. Blastocystis spp. subtype 10 infected beef cattle in Kamal and Socah, Bangkalan, Madura, Indonesia

Lucia Tri Suwanti, Yuli Susana, Poedji Hastutiek, Endang Suprihati and Nunuk Dyah Retno Lastuti

Veterinary World, 13(2): 231-237

ABSTRACT

Background and Aim: Blastocystis spp. is a gastrointestinal parasite that can infect both humans and animals and has the potential to become a zoonotic parasite. This study analyzed a subtype (ST) of Blastocystis spp. that had infected beef cattle in Kamal and Socah, Bangkalan, Madura, Indonesia.

Materials and Methods: Fresh stool samples were collected from 108 beef cattle at Kamal and Socah, Bangkalan, Madura, Indonesia. Blastocystis spp. were detected both morphologically and genetically based on the 18S rRNA gene. The morphology of Blastocystis spp. from the stool samples and cultured samples were observed under a light microscope. Blastocystis spp. from 20 positive cultures were amplified through polymerase chain reaction, and the resultant sequences were identified by ST.

Results: One hundred and eight (100%) fecal samples from the fresh or cultured stools were positive morphologically for Blastocystis spp. Molecularly, all 20 of the samples selected for DNA analysis were found to be Blastocystis spp. ST 10.

Conclusion: Based on morphological and molecular detection, the prevalence of Blastocystis spp. infection in beef cattle within Kamal and Socah, Bangkalan, Madura, Indonesia, was high. About 100% were non-zoonotic parasites. This was the first report of Blastocystis spp. ST 10 found in infected beef cattle in Kamal and Socah, Bangkalan, Madura, Indonesia.

Keywords: beef cattle, Blastocystis spp. subtype 10, Madura, Indonesia, zoonotic.

Epidemiology, burden, and geographical distribution of cystic echinococcosis in Central Iran

Research (Published online: 06-02-2020)

4. Epidemiology, burden, and geographical distribution of cystic echinococcosis in Central Iran

Abedin Saghafipour, Masoumeh Divband, Leyli Zanjirani Farahani, Hadi Hamidi Parsa and Hossein Golabchi Fard

International Journal of One Health, 6(1): 17-22

ABSTRACT

Background and Aim: Human cystic echinococcosis (CE) is an important, neglected zoonotic disease with worldwide distribution which has been reported in different regions of Iran, including the central areas (e.g. Qom Province). The disease is caused by the Echinococcus granulosus parasite living in the intestine of dogs and other canids as definitive hosts. This study aimed to investigate the epidemiology, burden, and geographical distribution of CE in Qom Province, Central Iran.

Materials and Methods: In this descriptive-analytic study, the data of patients with diagnosed CE during 2011-2018 were collected from all urban and rural areas of Qom Province. The data of the epidemiological status of CE cases were extracted from the CE surveillance system in the Centers for Disease Control and Prevention in the Qom University of Medical Sciences which is owned and run by Iran's Ministry of Health and Medical Education. In addition, the economic burden of the disease was evaluated by Azarakhsh and Roozamad financial software; the geographical distribution of CE was obtained by ArcGIS 10.3 software (IBM Corp., Chicago, USA).

Results: The results reveal that the incidence rate of CE was 6.81/100,000 people over the 8-year period of the study. More than half of the cases were females (57.95%), housewives (57.47%), and residents (89.77%). The majority of the cases were Iranian (88.77%) and the rest were from the two neighboring countries: Afghanistan and Pakistan. The economic burden of the human CE in the 8 years was estimated to be 3,761,352,526 rials (75,227 $). In terms of spatial distribution, the highest incidence rate of CE was observed in Salafchegan District in the southwest of Qom Province.

Conclusion: The economic burden of human CE infection provided by governmental health-care systems or as out-of-pocket expenses is relatively high, and housewives, especially those living in Salafchegan District, are more likely to be affected. More studies are recommended on different epidemiological aspects and the definitive hosts of the parasite; besides, people at risk need to be warned and educated so that the incidence rate of the disease is reduced.

Keywords: cystic echinococcosis, hydatidosis, Iran.

Perceptions and preparedness of veterinarians to combat brucellosis through Brucellosis Control Programme in India

Research (Published online: 03-02-2020)

1. Perceptions and preparedness of veterinarians to combat brucellosis through Brucellosis Control Programme in India

R. Shome, M. Nagalingam, R. Priya, S. Sahay, T. Kalleshamurthy, A. Sharma, R. G. Bambal, H. Rahman and B. R. Shome

Veterinary World, 13(2): 222-230

ABSTRACT

Background and Aim: Brucellosis caused by bacteria belongs to the genus Brucella is an important zoonosis and constitutes a serious public health hazard worldwide including India. The present study aimed to estimate the knowledge of veterinarians on brucellosis, its public health threat, diagnosis, and vaccination.

Materials and Methods: This cross-sectional study was conducted during 2013-2015 and 453 veterinarians representing 11 states/Union Territories (UT) of India (Assam, Tripura, Meghalaya, Goa, Karnataka, Madhya Pradesh, Uttar Pradesh, Delhi, Jammu and Kashmir, Tamil Nadu, and Punjab) were interviewed using self-administered questionnaire.

Results: Out of 453 veterinarians, 71.74% stated handling of the animals on day-to-day basis and 28.25% were engaged in administration activities. The veterinarians ranked foot-and-mouth disease and brucellosis at the first and fourth ranks among the list of ten economic impacted diseases in the country. A significant association was observed between laboratory confirmation with those who handled brucellosis-suspected cases (p=0.000). Similarly, significant association was noted for the availability of vials/slides (p=0.114), vacutainers (p=0.008), icebox (p=0.103), and refrigerator (p=0.106) for those who preferred laboratory diagnosis. Only 20% of the veterinarians recommended vaccination against bovine brucellosis, and 17% obtained laboratory confirmation for the brucellosis-suspected cases.

Conclusion: The study highlighted the need for awareness programs, laboratory facilities, veterinary doctors, and protective measures for the veterinarians for combating brucellosis through the control program in the country.

Keywords: brucellosis, control program, India, knowledge, veterinary professionals.

Cell-mediated and humoral immune profile to hydatidosis among naturally infected farm animals

Research (Published online: 31-01-2020)

32. Cell-mediated and humoral immune profile to hydatidosis among naturally infected farm animals

Faten A. M. Abo-Aziza, Seham H. M. Hendawy, Samah S. Oda, Dina Aboelsoued and Eman E. El Shanawany

Veterinary World, 13(1): 214-221

ABSTRACT

Background and Aim: Cystic echinococcosis (CE) is a widespread parasitic disease caused by Echinococcus granulosus tapeworm infect different intermediate hosts including sheep, cattle, and camels. The intermediate host's immune response to the hydatid cyst is still conflict and complex. The current study was designed to evaluate the immune response in sera of hydatid naturally infected sheep, cattle, and camels in the form of features of inflammatory cell infiltrations, levels of Th1 and Th2 cytokines, besides the humoral specific immunoglobulin G (IgG) responses.

Materials and Methods: Thirty-nine sheep, 74 cattle, and 79 camels' sera were collected and considered as CE naturally infected and ten samples from each species were graded as non-infected. Lung specimens were collected for histopathological examination. The quantitative concentrations of tumor necrosis factor-α, interleukin (IL)-6, IL-4, and IL-10 were determined. Different antigens were prepared from hydatid cyst; hydatid cyst fluid of lung origin hydatid cyst fluid of liver origin, hydatid cyst protoscoleces of lung origin (HCP-g), hydatid cyst protoscoleces of liver origin , hydatid cyst germinal layer of lung origin, and hydatid cyst germinal layer of liver origin; and characterized by gel electrophoresis and Western blotting analysis. The total specific IgG level against E. granulosus infection was measured using an indirect enzyme-linked immunosorbent assay.

Results: The results indicated that the cellular immune response in the infected tissues was characterized by inflammatory cell penetration. The pro-inflammatory Th1 cytokine profile was predominant in infected animals in comparison with non-infected ones. However, the humoral immune response was seen as a high level of IgG in infected animals. The presented data approved that the HCP-g antigen could be considered as a delegate antigen for all other prepared antigens with an immunoreactive band at molecular weights 32 kDa.

Conclusion: This study provides a fundamental insight into the events that manipulate cellular and humoral immune profiles in an intermediate host; sheep, cattle, and camel that naturally infected with CE. Hence, it was concluded that CE is a constant disease and confirm the reactivity Th1 in combating hydatid cyst. Besides, it could lead to the activation of the humoral immune response in the form of a high level of IgG.

Keywords: cell-mediated immune response, humoral immune response, hydatidosis.

Therapeutic evaluation of homeopathic treatment for canine oral papillomatosis

Research (Published online: 31-01-2020)

31. Therapeutic evaluation of homeopathic treatment for canine oral papillomatosis

P. Albert Arockia Raj, Selvaraj Pavulraj, M. Asok Kumar, S. Sangeetha, R. Shanmugapriya and S. Sabithabanu

Veterinary World, 13(1): 206-213

ABSTRACT

Aim: A study was conducted to evaluate the ameliorative potential of homeopathic drugs in combination (Sulfur 30C, Thuja 30C, Graphites 30C, and Psorinum 30C) in 16 dogs affected with oral papillomatosis which was not undergone any previous treatment.

Materials and Methods: Dogs affected with oral papillomatosis, which have not undergone any initial treatment and fed with a regular diet. Dogs (total=16) were randomly divided into two groups, namely, homeopathic treatment group (n=8) and placebo control group (n=8). Random number table was used for allocation. Homeopathic combination of drugs and placebo drug (distilled water) was administered orally twice daily for 15 days. Clinical evaluation in both groups of dogs was performed by the same investigator throughout the period of study (12 months). Dogs were clinically scored for oral lesions on days 0, 5, 7, 10, 15, 20, 25, 30, 45, 60, 90, 120, and 150 after initiation of treatment.

Results: The homeopathic treatment group showed early recovery with a significant reduction in oral lesions reflected by clinical score (p<0.001) in comparison to placebo-treated group. Oral papillomatous lesions regressed in the homeopathic group between 7 and 15 days, whereas regression of papilloma in the placebo group occurred between 90 and 150 days. The homeopathic treated group was observed for 12 months post-treatment period and no recurrence of oral papilloma was observed.

Conclusion: The current study proves that the combination of homeopathy drugs aids in fastening the regression of canine oral papilloma and proved to be safe and cost-effective.

Keywords: Graphites, homeopathy, oral papillomatosis, Psorinum, Sulfur, Thuja.

Prevalence and risk factors of some arthropod-transmitted diseases in cattle and sheep in Jordan

Research (Published online: 28-01-2020)

30. Prevalence and risk factors of some arthropod-transmitted diseases in cattle and sheep in Jordan

Zaidoun S. Hijazeen, Zuhair Bani Ismail and Ahmad M. Al-Majali

Veterinary World, 13(1): 201-205

ABSTRACT

Aim: The objectives of this study were to determine the prevalence and associated risk factors of bluetongue virus (BTV) in sheep and bovine ephemeral fever virus (BEFV) in dairy cattle in Jordan.

Materials and Methods: A simple randomized study was designed to collect 600 serum samples from sheep and 300 serum samples from dairy cattle located in the Northwestern parts of Jordan. In addition, data regarding farm management were collected using a pre-tested questionnaire through personal interview to determine potential risk factors. The seroprevalences of BEF and BTVs were determined using serum neutralization test and BTV group-specific competitive enzyme-linked immunosorbent assay, respectively.

Results: The overall seroprevalence of neutralizing antibodies against BEFV in dairy cattle was 45.37%. The overall seroprevalence of BTV group-specific antibodies in sheep was 47.8% (54% true seroprevalence). Logistic regression analysis identified geographic location (Irbid) (odds ratio [OR]=1.0; confidence interval [CI]=0.5-2.1), no use of disinfectants on the farm (OR=1.0; CI=0.05-0.1), and lack of veterinary services (OR=10; CI=3.5-13.2) as risk factors associated with high seropositivity against BTV in sheep. Geographic location (Jarash) (OR=3; CI=1.0-5.5), age of the animal (1-2 years of age (OR=1; CI=0.3-1.9), and lack of veterinary services (OR=9; CI=4-11) were identified as risk factors associated with high seroprevalence against BEFV in dairy cattle.

Conclusion: Results of this study indicate that BEFV in dairy cattle and BTV in sheep are endemic in Northwestern regions of Jordan. Implementation of appropriate control measures is, therefore, required to reduce the adverse effects of these diseases on animal health and productivity.

Keywords: arthropod-transmitted diseases, biosecurity, control measures, livestock, ruminants.

Morphological and adhesive properties of Klebsiella pneumoniae biofilms

Research (Published online: 28-01-2020)

29. Morphological and adhesive properties of Klebsiella pneumoniae biofilms

Ekaterina Lenchenko, Dmitry Blumenkrants, Nadezhda Sachivkina, Nadezhda Shadrova and Alfia Ibragimova

Veterinary World, 13(1): 197-200

ABSTRACT

Background and Aim: The study of biofilm-forming ability of Gram-negative microflora has great practical importance for assessing the effectiveness of antibiotic therapy and finding new ways to diagnose and inhibit the growth of biofilms. This is because poor penetration of antibacterial drugs into the biofilm can lead to the selection of resistant strains and has a consequence evident by the occurrence of relapse of infection in animals. This study aimed to evaluate morphological and densitometric indicators of biofilm formation as well as adhesive properties of Klebsiella pneumoniae.

Materials and Methods: K. pneumoniae was cultured at 37°C for 2-144 h in vitro. The specimens for optical microscopy were prepared by fixation with a 1:1 alcohol-ether mixture for 10 min and stained with a 0.5% solution of gentian violet for 2 min, and the optical density index was evaluated at a wavelength of 490 nm. Further, the adhesive properties of the microorganisms were determined at a concentration of 1 billion/ml and a suspension of ram erythrocytes at a concentration of 100 million/ml when cultured at 37°C for 24 h. Blood smears were prepared and stained with 0.5% gentian violet.

Results: K. pneumonia cultured at 37°C after 24 h on the meat peptone agar formed large, convex, mucous, and white colonies (d=3.0-6.0 mm). With the growth in the meat and peptone broth, uniform turbidity of the medium was observed. Analyzing the optical density indices (density, D), it was found that K. pneumoniae were good producers of biofilms (D=0.528±0.31). Data for indicators of adhesive properties of K. pneumoniae were as follows: Average adhesion index, 4.56±0.14; adhesion coefficient, 1.07±0.52; and adhesion index, 4.26±0.07. The studied bacteria had high adhesive activity. A direct correlation dependence (R=0.94) of the optical density of biofilms (D≥0.514-0.551) and AAI (4.15±0.28-4.76±0.75) was established.

Conclusion: This study has demonstrated that K. pneumoniae had high adhesive activity, was strong producer of biofilms, and the optical density of the sample exceeded the optical density of the control by more than 4 times.

Keywords: adhesion coefficient, average adhesion index, biofilms, Gram-negative microflora, Klebsiella pneumoniae, optical density.

Protective effect of alpha-lipoic acid and omega-3 fatty acids against cyclophosphamide-induced ovarian toxicity in rats

Research (Published online: 27-01-2020)

28. Protective effect of alpha-lipoic acid and omega-3 fatty acids against cyclophosphamide-induced ovarian toxicity in rats

Dhanya Venugopalan Nair, M. Usha Rani, A. Gopala Reddy, B. Kala Kumar, M. Anudeep Reddy, M. Lakshman and U. Rajkumar

Veterinary World, 13(1): 188-196

ABSTRACT

Background and Aim: Cyclophosphamide therapy is known to be associated with the risk of female infertility as a result of ovarian toxicity. Alpha-lipoic acid (LA) and omega-3 fatty acids are known for their antioxidant and anti-inflammatory activities. The present study investigated the potential protective effect of alpha-LA, omega-3 fatty acids, and its combination against cyclophosphamide-induced ovarian toxicity in rats.

Materials and Methods: Thirty rats were equally divided into Groups I, II, III, IV, and V. Group I was normal control, wherein the rats were fed with normal feed and water ad libitum. Group II served as cyclophosphamide-induced group, wherein the rats were injected with cyclophosphamide at 75 mg/kg through intraperitoneal route once a week to induce ovarian toxicity. Groups III and IV were treated with alpha-LA at the rate of 25 mg/kg and omega-3 fatty acids at the rate of 400 mg/kg, respectively, in parallel to cyclophosphamide induction as in Group II. Group V animals were coadministered with alpha-LA (25 mg/kg) and omega-3 fatty acids (400 mg/kg) along with cyclophosphamide induction as in Group II. The respective treatments were administered daily through oral route for a period of 30 days. Regularity of estrous cycle was evaluated by vaginal cytology. Post-treatment period, the animals were humanely sacrificed, and the blood samples were subjected to the estimation of follicle-stimulating hormone (FSH) and estrogen. The ovarian tissue was weighed and subjected to histopathology, transmission electron microscopy, estimation of decreased glutathione (GSH), and tumor necrosis factor (TNF)-alpha.

Results: Rats treated with cyclophosphamide alone manifested irregularity in estrous cycle, increased FSH, and reduced estrogen levels. The ovaries showed decreased GSH and increased TNF-alpha concentrations. Histopathological and transmission electron microscopic analysis of the ovarian follicles revealed degenerative changes. Administration of alpha-LA and omega-3 fatty acids as well as the combination of both the treatments demonstrated significant normalization of the estrous cycle and antioxidant defense mechanism as well as ameliorated the hormonal profile and histological architecture of the ovarian follicles. However, appreciable synergistic efficacy of the combination therapy (alpha-LA+omega-3 fatty acids) with respect to the monotherapies was not observed in the present study.

Conclusion: The efficacy of alpha-LA and omega-3 fatty acids against cyclophosphamide-induced ovarian toxicity could be attributed to its antioxidant and anti-inflammatory activities that prevented the oxidative damage to the ovaries caused by cyclophosphamide. Hence, our findings suggest that dietary supplementation of alpha-LA and omega-3 fatty acids in women receiving cyclophosphamide therapy could carry potential benefits in preventing cyclophosphamide-induced infertility in childbearing women.

Keywords: alpha-lipoic acid, cyclophosphamide, omega-3 fatty acid, ovarian toxicity, oxidative stress.

Salmonella Enteritidis reduction in layer ceca with a Bacillus probiotic

Research (Published online: 25-01-2020)

27. Salmonella Enteritidis reduction in layer ceca with a Bacillus probiotic

Paul T. Price, Thomas A. Gaydos, Roy D. Berghaus, Virginia Baxter, Charles L. Hofacre and Michael D. Sims

Veterinary World, 13(1): 184-187

ABSTRACT

Background and Aim: Salmonella Enteritidis (SE) is a significant foodborne pathogen that can often be traced to poultry and poultry products. This study aims to evaluate the ability of three commonly used non-antimicrobial feed additives in reducing the amount of SE in the ceca of laying type pullets.

Materials and Methods: On day 0, 60 Hy-Line Brown pullets aged 9 weeks were allocated to individual cages in 15 replicate blocks of four pens. Pullets were administered a mash feed provided ad libitum without supplementation (control) or with dietary supplementation of 454 g/ton yeast cell wall (YCW), or 454 g/ton Bacillus spp. probiotic, or 1133 g/ton yeast culture (YC). On day 3 of the trial, all birds were orally administered 3×107 CFU of a nalidixic acid-resistant SE. On day 10, 7 days after inoculation, all birds were humanely euthanized, and the ceca were aseptically removed for analysis.

Results: There was no significant difference in the prevalence of SE among treatments. The mean quantity of SE detected in the ceca expressed in log10 most probable number/g was 2.52 in the control, 2.49 in the YCW treatment, 1.73 in the probiotic treatment, and 1.66 in the YC treatment. The reduction between control and probiotic and control and YC was significant (p=0.021).

Conclusion: This study demonstrates the ability of the novel probiotic and the YC to reduce the load of SE in layer ceca.

Keywords: layers, probiotic, Salmonella Enteritidis, yeast cell wall, yeast culture.

Toxicity and anthelmintic efficacy of chitosan encapsulated bromelain against gastrointestinal strongyles in Small East African goats in Kenya

Research (Published online: 25-01-2020)

26. Toxicity and anthelmintic efficacy of chitosan encapsulated bromelain against gastrointestinal strongyles in Small East African goats in Kenya

Shukuru Wasso, Naomi Maina and John Kagira

Veterinary World, 13(1): 177-183

ABSTRACT

Background and Aim: The development of resistance to anthelmintic drugs has prompted research into alternative methods of controlling intestinal nematodes in ruminants. This study aimed at evaluating the in vitro and in vivo anthelmintic efficacy and toxicity of chitosan encapsulated bromelain in Small East African goats in Kenya.

Materials and Methods: Adult mortality assay was performed using live Haemonchus contortus worms treated with encapsulated bromelain solution ranging from 0.125 mg/ml to 2 mg/ml. Percentage mortality of worms was calculated after 24 h and the lethal concentration 50% (LC50) determined. For the in vivo study, 18 healthy male indigenous goats were divided into six groups of three goats each. The encapsulated bromelain was orally administered in increasing dosages (3-30 mg kg) once daily, for 14 days. The packed cell volume (PCV), aspartate aminotransferase (AST), alanine aminotransferase (ALT), urea, creatinine, and fecal egg count (FEC) were determined on a weekly basis. At the end of the study, the goats were sacrificed and gross pathology and histopathology of main organs assessed.

Results: Albendazole had the highest (p<0.05) anthelmintic effect on the worms. An LC50 of 0.05 mg/ml, 0.445 mg/ml, and 0.155 mg/ml was observed for albendazole, plain bromelain, and encapsulated bromelain, respectively. The PCV of treated and untreated goats did not show any significant difference (p>0.05), varied from 29.3% to 35.1%, and was within the normal range of the animal. Likewise, no significant differences (p>0.05) were observed between the AST, ALT, urea, and creatinine levels of treated and the control (non-treated) goats. No adverse clinical symptoms, toxicity of the main organs, and mortality in goats were associated with the chitosan encapsulated bromelain after administration of dose up to 30 mg/kg for 14 days. Therefore, the lethal dose 50 of encapsulated bromelain may be considered to be >30 mg/kg. On day 28 post-treatment, the encapsulated bromelain showed a higher in vivo FEC reduction (68.8%) as compared to the plain bromelain (32.4%).

Conclusion: Our results show that bromelain encapsulated in chitosan may be safe and effective in reducing the burden of gastrointestinal tract strongyle nematodes in goats. However, there is a need for further studies to establish the dosage of the encapsulated bromelain to be administered in a single dose for the treatment of goats against gastrointestinal strongyles. In addition, species-specific studies on the efficacy of encapsulated bromelain on strongyles are necessary to evaluate its effectiveness against the entire Strongyloididae family.

Keywords: anthelmintic efficacy, bromelain, chitosan, goats, nanoencapsulation, toxicity.

Multilocus analysis of Gallid herpesvirus 1 in layer chickens in Iraq

Research (Published online: 24-01-2020)

25. Multilocus analysis of Gallid herpesvirus 1 in layer chickens in Iraq

Mohammed Hamzah Abdulkadhim Al-Saadi

Veterinary World, 13(1): 170-176

ABSTRACT

Background and Aim: Infectious laryngotracheitis virus (ILTV) causes a highly pathogenic respiratory disease that affects poultry. It is also known as Gallid herpesvirus 1. ILT prophylaxis measures often include using live attenuated vaccines. The live attenuated vaccine can, however, lead to the formation of new strains of ILTV as a result of vaccine reversion and recombination with field strains. Therefore, this study was performed to explore the multilocus variation of ILTV strains of field and vaccine origin. Samples were tested from two distinctive geographical areas in Iraq as little is known about the ILTV genetic diversity within these areas.

Materials and Methods: The polymerase chain reaction method was utilized to generate sequencing templates of six highly polymorphic genes, including UL54, UL52, gB, ICP18.5, ICP4, and gJ in the layer chicken sample (n=15). The Western blotting technique was also employed to detect and estimate the native molecular weight of gE.

Results: The results revealed an important degree of genetic relatedness between the field and vaccine strains across all genes. In addition, gE was found to be expressed natively at 49 kDa.

Conclusion: The findings of this study may be used to improve the production process of the vaccine for more effective ILT prophylaxis and could further the understanding of epidemiologists and immunologists to better control ILT in the future.

Keywords: Gallid herpesvirus 1, infectious laryngotracheitis virus, infectious laryngotracheitis, polymerase chain reaction.

Effect of immunoglobulin G concentration in dairy cow colostrum and calf blood serum on Cryptosporidium spp. invasion in calves

Research (Published online: 24-01-2020)

24. Effect of immunoglobulin G concentration in dairy cow colostrum and calf blood serum on Cryptosporidium spp. invasion in calves

Alīna Derbakova, Maksims Zolovs, Dace Keidāne and Žanete Šteingolde

Veterinary World, 13(1): 165-169

ABSTRACT

Aim: The research aimed to test the association between the level of immunoglobulin G (IgG) in bovine colostrum and calf blood serum and to evaluate its relation to Cryptosporidium spp. invasion in calves.

Materials and Methods: Fresh colostrum and fecal specimens from cows (n=114) as well as blood and fecal specimens from newborn calves (n=114) were collected in the dairy cattle farm. Investigated calves were separated from their mothers directly after birth and received 2 L of colostrum in two separate feedings within the first 24 h. Blood samples were taken from calves at the age of 2 days. Coprological samples were taken from calves at the age of 1, 10, and 15 days. Both colostrum and fecal samples from cows were taken on the 1st day after calf birth. Rectal fecal samples were collected separately from each calf and cow into plastic bags. The collected calf serum samples and bovine colostrum samples were tested for bovine IgG by competitive enzyme-linked immunosorbent assay kit bovine Ig. To record oocysts of Cryptosporidium spp. in feces, the flotation method was used. Binomial logistic regression was performed to ascertain the effects of IgG in bovine colostrum and calf blood serum on the likelihood of Cryptosporidium spp. infection in calves.

Results: The concentration of IgG in bovine colostrum was higher (70.7±26.6 g/L, mean±standard deviation) than that in calf blood serum (13.2±6.1 g/L); the statistically significant difference was 57.4 g/L (95% confidence interval, 52.4-62.4), t (124.872)=22.536, p<0.001. Mann–Whitney's U-test showed a significant difference between samples collected on days 10 and 15 of the experiment (U=1944, z=2.330, p=0.020). The higher number of oocysts in calf feces was recorded on day 15 (median=6.5) compared to day 10 (median=4). The prevalence of calf infection from days 10 to 15 increased from 26.3 to 45.6% and was at least 3 times higher than in cows. A statistically significant positive correlation was recorded between IgG concentration of cow colostrum and calf blood serum (r (114)=0.414, p=0.001), whereas a correlation between the concentration of IgG and the intensity of Cryptosporidium spp. infection was not recorded (p>0.05). The logistic regression model was not statistically significant (χ2(2)=0.013, p=0.99 (10 days) and χ2(2)=0.100, p=0.95 (15 days)).

Conclusion: Mother passive transfer of immunity to the offspring through colostrum does not influence the susceptibility of calves to Cryptosporidium infestation.

Keywords: calves, Cryptosporidium, dairy cows, immunoglobulins.

The influence of duration on pain stress, oxidative stress, and total antioxidant power status in female dogs undergoing ovariohysterectomy

Research (Published online: 23-01-2020)

23. The influence of duration on pain stress, oxidative stress, and total antioxidant power status in female dogs undergoing ovariohysterectomy

Kanissarinn Sakundech, Chayanon Chompoosan, Pongsatorn Tuchpramuk, Thongchai Boonsorn and Worapol Aengwanich

Veterinary World, 13(1): 160-164

ABSTRACT

Background and Aim: Ovariohysterectomy (OHE) is a common procedure for sterilization of female dogs. However, knowledge of changes in pain stress, oxidative stress, and total antioxidant power status before, during, and after OHE is limited. The objective of this experiment was to study the effect of duration on pain stress, oxidative stress, and total antioxidant power status in female dogs undergoing OHE.

Materials and Methods: Seven female dogs were sterilized using the OHE method. Pain scores, hematological changes, and biochemical markers were investigated during pre-operative, 3 h after starting OHE, and on days 3, 7, 10, and 14 of an experimental period. Data were analyzed using one-way analysis of variance.

Results: At 3 days after OHE, pain score was higher than on days 7-14 of the experimental period; percentage of neutrophil, 3 h after starting OHE, was higher than during pre-operative and on days 3-14 of the experimental period; percentage of lymphocyte on days 10-14 was lower than during pre-operative, 3 h after starting OHE, and on days 3-7 of the experimental period; neutrophil/lymphocyte ratio, 3 h after starting OHE, was higher than during pre-operative and on days 3-14 of the experimental period; plasma malondialdehyde on day 3 was higher than during pre-operative, 3 h after starting OHE, and on days 3-14 of the experimental period; and total antioxidant power on day 14 was higher than during pre-operative, 3 h after starting OHE, and on days 3-10 of the experimental period, respectively.

Conclusion: This experiment indicated that OHE caused pain stress, oxidative stress, and reduction of total antioxidant power in female dogs. Finally, female dogs needed antioxidant for 7 days after OHE.

Keywords: female dog, ovariohysterectomy, oxidative stress, pain stress, total antioxidant power.

Effects of sublethal and realistic concentrations of the commercial herbicide atrazine in Pacu (Piaractus mesopotamicus): Long-term exposure and recovery assays

Research (Published online: 23-01-2020)

22. Effects of sublethal and realistic concentrations of the commercial herbicide atrazine in Pacu (Piaractus mesopotamicus): Long-term exposure and recovery assays

Mariana Cruz Delcorso, Paula Pereira de Paiva, Marcela Regina Paganuchi Grigoleto, Sônia C. N. Queiroz, Carla Beatriz Collares-Buzato and Sarah Arana

Veterinary World, 13(1): 147-159

ABSTRACT

Background and Aim: The commercial formulations of the herbicide atrazine (cATZ) are widely employed in Brazilian agriculture, and, as a consequence, ATZ has been found at levels above that established by law in the river basins in Brazil. Although the toxicity of ATZ in fish is well documented, there are few studies on the recovery capacity after cATZ exposure. This work aimed to evaluate, using several biomarkers, the toxic effects of long-term exposure to the sublethal (3.57 mg/L) and nonlethal realistic (3.00 μg/L) cATZ concentrations followed by a recovery assay, in fingerlings of a Brazilian teleost, the Piaractus mesopotamicus (pacu).

Materials and Methods: Pacu fingerlings were housed in glass tanks and divided into the following experimental groups (two tanks/group): Exposure control = EC, recovery control = RC, the sublethal groups exposed to 3.57 mg/L of cATZ, (sublethal exposure group = SLE and sublethal recovery group = SLR) and the nonlethal groups treated with 3.00 μg/L of cATZ (nonlethal exposure group = NLE and nonlethal recovery group = NLR). The exposure assay was semi-static with a duration of 30 days and the recovery assay (after cATZ withdrawal) lasted 14 days. Several biomarkers were evaluated in fingerlings from all groups: The swimming behavior, the body weight gain, the micronucleus formation and nuclear alterations in erythrocytes, and the hepatic and renal histopathology analyzed by qualitative and semi-quantitative morphological methods (using light and electron microscopy).

Results: No significant difference in weight gain was observed among the groups after the exposure and recovery assays. The sublethal exposure induced impaired swimming movements, significant histopathological alterations, including necrosis in the liver and kidney, and a significant increase in the frequency of micronuclei in erythrocytes. The nonlethal exposure induced only subtle histopathological changes in the liver and kidney. After recovery assay, no genotoxic alteration was noted in pacu exposed to sublethal concentration, while the cATZ-induced kidney damage was partially reversed but not the hepatic injury.

Conclusion: cATZ exhibits long-term toxic effects on pacu, even at relatively low concentrations, affecting mainly the liver and the kidney, and the effects of sublethal concentration are only partially reversed after cATZ withdrawal.

Keywords: Brazilian ichthyofauna, genotoxicity, histopathology, liver and kidney lesions, recovery assay, ultrastructure.

A simple and efficient purification method of native immunoreactive antigen for diagnosis of camel hydatidosis

Research (Published online: 23-01-2020)

21. A simple and efficient purification method of native immunoreactive antigen for diagnosis of camel hydatidosis

Nagwa I. Toaleb, Mohamed S. Helmy, Eman E. El Shanawany and Eman H. Abdel-Rahman

Veterinary World, 13(1): 141-146

ABSTRACT

Background: Cystic echinococcosis (CE), a zoonotic disease that affects animal and human health, is of increasing economic importance due to high morbidity rates and high economic losses in the livestock industry.

Aim: The present study was conducted to purify the antigen from hydatid cyst fluid (HCF) with high diagnostic efficacy of camel hydatidosis using indirect enzyme-linked immunosorbent assay (ELISA).

Materials and Methods: The HCF antigen was purified using Sephacryl S-300 column chromatography. Characterization of fractions was performed using reducing and non-reducing sodium dodecyl sulfate–polyacrylamide gel electrophoresis (SDS-PAGE) and Western blot analysis. Further, antibodies against Echinococcus granulosus cysts in camel serum were detected using indirect ELISA.

Results: The purification process resulted in three fractions of antigens: FI, FII, and FIII. Indirect ELISA showed that higher diagnostic efficacy was observed in FI than in FII and FIII. Indirect ELISA, in which FI was utilized, showed 88% sensitivity and 91.7% specificity. Non-reducing SDS-PAGE showed that FI had two bands of molecular weights 120 and 60 kDa. Western blot analysis of FI demonstrated that 60, 38, and 22 kDa were antigenic bands when reacted with naturally infected camel sera with E. granulosus cysts. Using indirect ELISA, F1 recorded an infection percentage of 81.7% in randomly collected camel serum samples.

Conclusion: FI is a promising antigen for accurate diagnosis of camel CE using indirect ELISA.

Keywords: camel hydatidosis, cystic echinococcosis, Echinococcus granulosus, gel filtration chromatography, hydatid cyst fluid, indirect enzyme-linked immunosorbent assay, sodium dodecyl sulfate–polyacrylamide gel electrophoresis, Western blot.

Prevalence of Salmonella spp. in red-footed tortoises (Chelonoidis carbonaria) from Grenada, West Indies

Research (Published online: 22-01-2020)

3. Prevalence of Salmonella spp. in red-footed tortoises (Chelonoidis carbonaria) from Grenada, West Indies

Ravindra Nath Sharma, Vanessa Matthew-Belmar, Roxane Nicholas-Thomas, Gitanjali Arya, Bob Holtslander, Harry Hariharan and Victor A. Amadi

International Journal of One Health, 6(1): 12-16

ABSTRACT

Background and Aim: There is currently no published information on the prevalence of Salmonella spp. in pet red-footed tortoises in Grenada. Monitoring is essential to understand the dynamics of the epidemiology of Salmonella. This study aimed to estimate the prevalence of Salmonella spp. from pet red-footed tortoises from Grenada and to test for antimicrobial drug resistance of the isolates.

Materials and Methods: Established bacterial culture, serotyping, and antimicrobial susceptibility methods were used. Fecal samples were obtained from 114 tortoises from five parishes of Grenada, and cultured for Salmonella using enrichment and selective culture techniques. The serotyping of isolated Salmonella was performed at the Office International des Epizooties Salmonella Reference Laboratory, Guelph, Ontario, Canada. The isolates were tested for antimicrobial susceptibility in the Microbiology Laboratory of the School of Veterinary Medicine, St. George's University, Grenada.

Results: Fifteen tortoises (13.2%) out of 114 were positive for Salmonella spp. Five serovars were identified: Salmonella Javiana (6.3%), Salmonella Rubislaw (6.3%), Salmonella Saintpaul (18.75%), Salmonella Glostrup (6.3%), and S. I: Rough.O;e,h:1,2 (62.5%). All isolates were sensitive to the 12 antimicrobial drugs.

Conclusion: Three serovars (S. Javiana, S. Saintpaul, and S. Rubislaw) are known pathogens causing disease in humans. Since tortoises included in the study were pets, the tortoises may be a possible source of transmission of Salmonella to their owners. The tortoise owners should be educated on the importance of hygienic raising of their pets. This is the first report of isolation of Salmonella spp. from pet red-footed tortoises in Grenada.

Keywords: antimicrobial susceptibility, Grenada, red-footed tortoises, Salmonella spp.

Determination of gentamicin use in poultry farms in Enugu state, Nigeria, and detection of its residue in slaughter commercial broilers

Research (Published online: 20-01-2020)

2. Determination of gentamicin use in poultry farms in Enugu state, Nigeria, and detection of its residue in slaughter commercial broilers

Chika ThankGod Onyeanu, Ekene Vivienne Ezenduka and Aruh Ottah Anaga

International Journal of One Health, 6(1): 6-11

ABSTRACT

Background and Aim: Gentamicin is a broad-spectrum antimicrobial used in the treatment of a variety of bacterial infections in poultry, its residue in tissues is known to have a deleterious effect in man when consumed. The study aimed to determine the use of gentamicin by poultry farmers and the presence and occurrence of gentamicin residue in tissues of commercial broilers in Ikpa slaughterhouse Nsukka.

Materials and Methods: The study adopted a cross-sectional survey using questionnaire and immunological screening. A total of 108 broilers were sampled, testing 108 each of muscle, liver, and kidney tissues for gentamicin residue using enzyme-linked immunosorbent assay.

Results: The questionnaire survey revealed that in the management practices, 55.2% of the farms used intensive deep litter, 21% intensive battery cage, and 23.6% extensive farming system. Twenty-seven (71%) farms reared only broilers, 10.5% layers, and 18.4% both. The feeding management showed that 21.1% of farmers produced their own feed (medicated) while 78.8% used commercial feed, of which 11.5% incorporated antibiotics. Hundred (100%) of the respondents used gentamicin and only 47.3% were aware of the consequences of antimicrobial residue in foods of animal origin, with knowledge of the legislation on the prudent use of antimicrobials in food animals. The occurrence of gentamicin residue in surveyed birds was 65% with tissue distribution as follows: Muscle (44.4%), liver (51.9%), and kidney (59.3%).

Conclusion: Poultry farms in the study area make constant use of gentamicin without observing its withdrawal period before sale, and a high percentage of the commercial birds meant for human consumption contains gentamicin residue. Therefore, consumers might be at risk of consuming gentamicin as a parent drug or its metabolites in commercial poultry.

Keywords: enzyme-linked immunosorbent assay, farm management, gentamicin, poultry, residue.