Analysis of spatial dynamic of epizootic process of bluetongue and its risk factors

Research (Published online: 04-10-2017)

4. Analysis of spatial dynamic of epizootic process of bluetongue and its risk factors

Fayssal Bouchemla, Olga Mikhailovna Popova and Valerey Alexandrovich Agoltsov

Veterinary World, 10(10): 1173-1183

ABSTRACT

Aim: The study was undertaken to find out the spatial dynamic occurrence and patterns of the global spread of bluetongue (BT) disease for the period from 1996 to 2016, as well as the assessment of the risk of occurrence and its spread in 2017-2018.

Materials and Methods: Outbreaks (serum samples were collected from clinically healthy as well as suspected animals in infected points) were confirmed and reported officially by veterinary departments which represent different geographical regions in the world to World Organization for Animal Health. These reports explained that ELISA and polymerase chain reaction were used to identify the BT disease, taking in the account number of infected, dead animals, and focus of BT infection in all susceptible animals from 1996 to 2016. Once conventional statistical population was defined (an observational study), we had classified data as well as possible to answer to our aim, using descriptive statistics methods, including the test of the relationship between different epizootiological indicators.

Results: The spatial dynamic study of BT's occurrence and its spread in the world over the two past decades was presented by different epizootic indicators. The given analysis includes assessment and measurement of risk factors. It was built too, regression models, and allowed to put different forecasts on the different epizootic indicators in the years 2017-2018 by the extrapolation method. We had also determined that, in 2017, BT continues to spread with the total expectancy of 3.4 focus of infection (number of diseased animals in a single unfavorable point) and mortality of about 26 %; these rates tend to decrease in 2018. At abused points by BT, up to 78.4% of animals are mixed (more than one type) and in 21.6% - uniform. By this way, the relative risk of the incidence of appearance-abused points in mixed households has 3.64, which might be considered higher for the BT dissemination. Moreover, between the enzootic index and other epizootiological indicators had revealed an inverse correlation, i.e., to an increase in the level of enzootic index among the cattle population would be formed population less sensitive to BT. Cluster analysis was done, which had demonstrated the zoning of risk levels in the world and the occurrence of the disease intensity in the period 1996-2016 years. Then, assess connection degree of the dynamic of BT tension with geographical and socioeconomic conditions background 0.66 and 0.68, respectively.

Conclusion: It is important to define a variety of BT risk factors and assess their influence on BT occurrence. However, the most important is to define the overlapping coinfluence between them that cause serious losses. To have an out of BT territory needs to make an emphasis of co-influence of risk factors on this zone. Was predicted a continue hits of disease in the next year with weight moderation through one year. Far from statists, to assess the given forecast may have a serious variety, taken in account problems of actual climate change in the world.

Keywords: bluetongue, extrapolation, outbreaks, regression model, risk factors.

Phenotypic and genotypic characterization of antimicrobial susceptibility of avian pathogenic Escherichia coli isolated from broiler chickens

Research (Published online: 03-10-2017)

3. Phenotypic and genotypic characterization of antimicrobial susceptibility of avian pathogenic Escherichia coli isolated from broiler chickens

Gamal Younis, Amal Awad and Nada Mohamed

Veterinary World, 10(10): 1167-1172

ABSTRACT

Aim: Avian pathogenic Escherichia coli (APEC) is pathogenic strains of E. coli that are responsible for one of the most common bacterial diseases affecting poultry worldwide. This study was designed to determine the occurrence, antibiotic resistance profile, and antibiotic resistance genes of E. coli isolated from diseased and freshly dead broilers.

Materials and Methods: In that context, a total of 200 broilers samples were examined by standard microbiological techniques for isolation of E. coli, and tested for their antimicrobial susceptibility against 15 antimicrobial agents using disc diffusion method. In addition, E. coli isolates were screened by multiplex polymerase chain reaction for detection of a number of resistance genes including aadA1 gene encodes streptomycin/neomycin, tetA encodes resistance to tetracycline, sul1 encodes sulfonamides, and β-lactamase encoding genes (blaTEM and blaSHV).

Results: A total of 73 (36.5%) isolates were biochemically identified as E. coli strains. O78, O2, and O1 are the most prevalent serotypes detected. E. coli displayed a high resistance against penicillin (100%), followed by cefepime (95.8%) and a low resistance to norfloxacin (36.9%), and chloramphenicol (30%). Depending on the results of PCR, sul1 gene was the most predominant antibiotic resistant gene (87%) followed by blaTEM (78%), tetA genes (60%), and aadA (54%). However, blaSHV had the lowest prevalence (23%).

Conclusion: The obtained results demonstrated the importance of studies on APEC and antibiotic resistance genes in our region which associated with intensive poultry industry, aiming to acquire preventive measures to minimize losses due to APEC and associated multidrug-resistance and resistance genes that of high significance to the rational use of antibiotics in clinical and public health.

Keywords: antimicrobial resistance, broilers, Escherichia coli, multiplex polymerase chain reaction, resistant genes.

Serological investigation of some important RNA viruses affecting sheep and goats in Giza and Beni-Suef governorates in Egypt

Research (Published online: 02-10-2017)

2. Serological investigation of some important RNA viruses affecting sheep and goats in Giza and Beni-Suef governorates in Egypt

Mohamed Abd El-Fatah Mahmoud, Mohamed Karam Elbayoumy, Doaa Sedky and Sahar Ahmed

Veterinary World, 10(10): 1161-1166

ABSTRACT

Aim: The aim of this study was to investigate the seroprevalence of antibodies against foot and mouth disease (FMD), Peste des Petits ruminants (PPR), and bluetongue (BT) in sheep and goats within Giza and Beni-Suef governorates at the second half of 2016.

Materials and Methods: A total of 300 animals (sheep and goats) randomly selected from small stocks with no history of previous vaccination against FMD virus (FMDV), PPR, or BT viruses (BTV) and examined with competitive enzyme-linked immunosorbent assay for detection of FMD-non-structural protein, PPR, and BT antibodies.

Results: Seroprevalence analysis revealed that antibodies against FMDV were 40.8% and 37.1% at Giza governorate, while at Beni-Suef governorate, the percent was 36.7% and 50% in sheep and goat, respectively. Antibodies against PPR were 63.8% in sheep and 45.7% in goats at Giza governorate, whereas the results for Beni-Suef governorate were 71.7% in sheep and 45% in goats. Antibodies against BT were 45% and 37% in sheep and goats, respectively, in Giza governorate, whereas the results for Beni-Suef governorate were 80% and 55% in sheep and goats, respectively. The average of BTV antibody prevalence was significantly higher in sheep (45% and 80%) than in goats (37% and 55%) in Giza and Beni-Suef, respectively. Statistical analysis for the three viruses showed the high relation between the two governorates in case of sheep (r=0.85) and in case of goats (r=0.87). In general, a strong positive correlation was observed between the governorates (r=0.93).

Conclusion: Giza and Beni-Suef governorates are endemic with FMDV, PPR, and BTV. Regional plan for characterization and combating FMD, PPR, and BT is recommended to help in the achievement of the most suitable combination of the vaccine regimen.

Keywords: bluetongue, enzyme-linked immunosorbent assay, foot and mouth disease, goats, Peste des Petits ruminants, sheep.

Identification of non-cerebral cyst: Zoonotic Taenia multiceps in domestic goat in Bangladesh

Research (Published online: 01-10-2017)

1. Identification of non-cerebral cyst: Zoonotic Taenia multiceps in domestic goat in Bangladesh

Mohammad Omer Faruk, A. M. A. M. Zonaed Siddiki, Md. Shafiqul Islam, Azizunnesa Rekha, Sharmin Chowdhury, Md. Masuduzzaman and Mohammad Alamgir Hossain

Veterinary World, 10(10): 1156-1160

ABSTRACT

Aim: This study was performed to identify the non-cerebral Taenia multiceps cyst through molecular phylogeny of the 12S rRNA gene.

Materials and Methods: Eight cyst samples were collected from 385 examined slaughtered goats during October 2015-September 2016 from three slaughterhouses in Chittagong City Corporation. Cysts were removed from the thigh muscle, and scolices were collected for light microscopic examination and molecular identification. The DNA was extracted and analyzed by polymerase chain reaction using 12S rRNA gene primers. Cyst samples were also preserved in 10% buffered formalin for histopathological study.

Results: T. multiceps non-cerebral cyst is 2.1% prevalent in goat in this area. Under light microscopic examination, scolex was found with four suckers and a rostellum with the double crown of 32 hooks and hooklets. Molecularly, all the samples were amplified with 12S rRNA gene fragments yielded 270 base pair amplicon. Zenker's necrosis with focal to diffuse infiltration of lymphocytes and eosinophil was also found around the cyst wall in histopathological examination.

Conclusion: Although the non-cerebral form of the cysts produced by T. multiceps is genetically identical with the cerebral cyst, previously published data indicated that cerebral T. multiceps cyst is predominant in other parts of the world as well as in Bangladesh. This study showed that non-cerebral cyst is also prevalent in this country which is very important for public health concern. This study depicts an idea of non-cerebral form of zoonotic T. multiceps cyst which will be helpful in taenia cyst control and prevention.

Keywords: 12SrRNA, Bangladesh, goat, non-cerebral cyst, phylogeny, Taenia multiceps.

Impact of heat stress and hypercapnia on physiological, hematological, and behavioral profile of Tharparkar and Karan Fries heifers

Research (Published online: 30-09-2017)

22. Impact of heat stress and hypercapnia on physiological, hematological, and behavioral profile of Tharparkar and Karan Fries heifers

Priyanka Pandey, O. K. Hooda and Sunil Kumar

Veterinary World, 10(9): 1149-1155

ABSTRACT

Aim: The present investigation was undertaken to study the impact of heat stress and hypercapnia on physiological, hematological, and behavioral profile of Tharparkar and Karan Fries (KF) heifers.

Materials and Methods: The animals of both the breeds of Tharparkar and KF were exposed at different temperatures and CO₂ levels. Exposure conditions of 25°C, 400 ppm CO₂ level, and 60% relative humidity (RH) were taken as a control condition. The exposure conditions 40°C with two levels of CO₂ 500 ppm and 600 ppm with RH 55±5% and exposure conditions 42°C with two levels of CO₂ 500 ppm and 600 ppm with RH 55±5% were taken as treatments. The exposure period in each condition was 4 h daily for 5 consecutive days.

Results: Physiological responses (respiration rate [RR], pulse rate [PR], and rectal temperature [RT]) were significantly (p<0.01) higher and different during all exposure conditions compared to control condition in both the breeds of cattle. KF heifers had higher RR, PR, and RT than Tharparkar heifers. Hematological parameters, namely, red blood cell, hemoglobin, and packed cell volume were significantly higher and different during all exposure condition than control in both the breeds, whereas no significant changes were observed in total leukocyte count and differential leukocyte count. Blood pH increased with increase in temperature and CO₂ levels and was significantly higher than control conditions. PCO₂ and base excess were significantly (p<0.05) lower, and PO₂ was higher during different exposure conditions than control in both breeds. Restlessness and excitement signs were observed in all the exposure conditions as compared to control condition in both the breeds.

Conclusion: Changes in physiological responses, behavioral pattern, and hematological parameters reflect the current functional status of the body system, and it can be used as an index for assessing the adaptation capacity of cattle to predict changes occurring in climate variables due to increasing CO₂ levels and environmental temperature.

Keywords: behavior, hematological, hypercapnia, hyperthermia, Tharparkar.

Congenital arthrogryposis-hydranencephaly syndrome caused by Akabane virus in newborn calves of Basrah Governorate, Iraq

Research (Published online: 29-09-2017)

21. Congenital arthrogryposis-hydranencephaly syndrome caused by Akabane virus in newborn calves of Basrah Governorate, Iraq

K. M. Alsaad, H. H. N. Alautaish and M. A. Y. Alamery

Veterinary World, 10(9): 1143-1148

Aim: The study was conducted in Basrah, Iraq, to diagnose congenital arthrogryposis-hydranencephaly syndrome caused by Akabane virus (AKAV) in calves.

Materials and Methods: Affected animals (42 calves) are about 2-27 days old from both sexes show signs of arthrogryposis and hydranencephaly. Eight clinically healthy newborn calves were considered as controls. Diagnosis of AKAV was confirmed using a competition enzyme-linked immunosorbent assay test.

Results: Results show that all affected calves were found seropositive. Furthermore, a significant increase in total leukocyte count in diseased calves due to a significant increase in the absolute lymphocyte number indicated in affected calves than in controls. Moreover, a significant increase in sedimentation rate of erythrocytes was also encountered in diseased calves than in controls. In addition, a significant increase in haptoglobin level and fibrinogen was also detected.

Conclusion: Diagnosis of AKAV infection of Basrah Governorate, Iraq, will provide useful epidemiological information for cattle and other domesticated animals. Therefore, abortion could be prevented and controlled.

Keywords: Akabane virus, arthrogryposis-hydranencephaly, calves, Iraq.

Prevalence of Corynosoma caspicum infection in Gasterosteus aculeatus fish in Caspian Sea, Northern Iran

Research (Published online: 27-09-2017)

20. Prevalence of Corynosoma caspicum infection in Gasterosteus aculeatus fish in Caspian Sea, Northern Iran

Bahman Rahimi-Esboei, Mahdi Najm, Morad Shaker, Mahdi Fakhar and Iraj Mobedi

Veterinary World, 10(9): 1139-1142

ABSTRACT

Aim: There is little information about the prevalence of Corynosoma caspicum in fish particularly Gasterosteus aculeatus in Iran and the world. The aim of the present study was to find out the prevalence of acanthocephalan infection in Babolsar district, southern coastal of Caspian Sea, Northern Iran.

Materials and Methods: Between September 2012 and August 2014, a total of 360 G. aculeatus fishes were randomly collected by drift nets from coastal regions in Babolsar and then examined the intestine and body cavity for worm infections.

Results: A total of 360 G. aculeatus fishes, 109 (30.3%) were found infected with at least one Corynosoma capsicum, and there was no significant association between genders and the prevalence infection of acanthocephalan. Moreover, there was a significant difference in infected rate between summer (79%, 86/109) and spring (21%, 23/109) (p<0.05).

Conclusion: The high occurrence of Corynosoma infection in G. aculeatus indicates the enzootic constancy status of the infection in the southern coastal of Caspian Sea, Northern Iran.

Keywords: Acanthocephalosis, Caspian Sea, Corynosoma caspicum, Gasterosteus aculeatus.

Epidemiological features and pathological study of avian leukosis in turkeys' flocks

Research (Published online: 26-09-2017)

19. Epidemiological features and pathological study of avian leukosis in turkeys' flocks

Mourad Zeghdoudi, Leila Aoun, Latifa Merdaci and Nardjes Bouzidi

Veterinary World, 10(9): 1135-1138

ABSTRACT

Aim: The purpose of this study was focused on the identification of tumor diseases in turkeys on the basis of a detailed description of epidemiological features, clinical signs, lesions, and histopathological changes.

Materials and Methods: Outbreak of a tumor disease in turkeys was investigated in various regions of Eastern Algeria. Four turkeys' flocks aged from 17 weeks were affected, resulting to mortality often over 10%, on a period of 15 days. The main epidemiological characters, clinical signs, and lesions were observed throughout all the course of the disease. Serum samples were collected from affected turkeys in each flock to detect p27 antigen in enzyme-linked immunosorbent assay (ELISA) test to diagnose avian leukosis virus (ALV). Portions of sciatic nerves and livers are taken from dead turkeys for microscopic examination.

Results: The disease was characterized by clinical signs such as anorexia, weakness, and diarrhea. Necropsy of the dead birds showed hepatomegaly and gross splenomegaly with neoplastic nodules or gray foci and diffuse infiltration in the myocardium and lungs. ALV antigen test using ELISA confirmed the presence of virus leukosis. Histopathological sections of the liver had proliferations of lymphoblastoid cells and absence of any modifications or lymphocytic infiltration in peripheral nerves.

Conclusion: The present study confirms that this disease condition is caused by lymphoid leukosis.

Keywords: enzyme-linked immunosorbent assay, epidemiological features, histopathology, lesions, leukosis, turkeys.

Repertoire of noncoding RNAs in corpus luteum of early pregnancy in buffalo (Bubalus bubalis)

Research (Published online: 25-09-2017)

18. Repertoire of noncoding RNAs in corpus luteum of early pregnancy in buffalo (Bubalus bubalis)

A. Jerome, S. M. K. Thirumaran and S. N. Kala

Veterinary World, 10(9): 1129-1134

ABSTRACT

Aim: The present study was designed to identify other noncoding RNAs (ncRNAs) in the corpus luteum (CL) during early pregnancy in buffalo.

Materials and Methods: For this study, CL (n=2) from two buffalo gravid uteri, obtained from the slaughter house, was transported to laboratory after snap freezing in liquid nitrogen (-196°C). The stage of pregnancy was determined by measuring the crown-rump region of the fetus. This was followed by isolation of RNA and deep sequencing. Post-deep sequencing, the obtained reads were checked and aligned against various ncRNA databases (GtRNA, RFAM, and deep guide). Various parameters, namely, frequency of specific ncRNAs, length, mismatch, and genomic location target in several model species were deciphered.

Results: Frequency of piwi-interacting RNAs (piwi-RNAs), having target location in rodents and human genomes, were significantly higher compared to other piwi-RNAs and ncRNAs. Ribosomal RNAs (rRNAs) deduced had nucleotides (nts) ranging from 17 to 50 nts, but the occurrence of small length rRNAs was more than lengthier fragments. The target on 16S rRNA species confirms the conservation of 16S rRNA across species. With respect to transfer RNA (tRNA), the abundantly occurring tRNAs were unique with no duplication. Small nucleolar RNAs (snoRNAs), identified in this study, showed a strong tendency for coding box C/D snoRNAs in comparison to H/ACA snoRNAs. Regulatory and evolutionary implications of these identified ncRNAs are yet to be delineated in many species, including buffaloes.

Conclusion: This is the first report of identification of other ncRNAs in CL of early pregnancy in buffalo.

Keywords: buffalo, corpus luteum, noncoding RNA, pregnancy.

Characterization and zoonotic impact of Shiga toxin producing Escherichia coli in some wild bird species

Research (Published online: 24-09-2017)

17. Characterization and zoonotic impact of Shiga toxin producing Escherichia coli in some wild bird species

Hanaa Mohamed Fadel, Rabab Afifi and Dheyazan Mohammed Al-Qabili

Veterinary World, 10(9): 1118-1128

ABSTRACT

Aim: Wild birds are considered silent vectors of some zoonotic water and food borne pathogens of public health significance. Owing to the importance of Shiga toxin producing Escherichia coli (STEC) as the most pathogenic among the emerging diarrheagenic E. coli groups that can infect man; the present study was designed to detect the occurrence of STEC among wild birds in Egypt.

Materials and Methods: A total of 177 intestinal content swab samples originating from five wild bird species were investigated for the presence of E. coli and STEC by standard culture methods. Suspect STEC isolates were further characterized by serotyping, random amplified polymorphic DNA polymerase chain reaction (RAPD PCR), antimicrobial resistance pattern and PCR detection of stx1, stx2, and eae genes.

Results: A total of 30 suspect STEC isolates from 30 positive birds' samples were detected and identified on STEC CHROMagar (semi-captive pigeons, 15; house crows, 8; cattle egrets, 3; moorhens, 2; and house teals, 2). 25 isolates were grouped into 13 serogroups (O:20, O:25, O:26, O:27, O:63, O:78, O:111, O:114, O:125, O:128, O:142, O:153, and O:158), while five were rough strains. The distribution of STEC virulence genes among wild birds was as follows: 16 birds carried stx1 gene only (nine pigeons [28.1%], six crows [7.1%], and one cattle egret [5.6%]). stx1 and stx2 genes together were detected in four birds (one cattle egret [5.6%], two moorhens [6.1%], and one house teal, [10%]). Only one pigeon (3.1%) possessed the three alleles. Disk diffusion test results showed that cefixime was the most effective against STEC serotypes with (93.3%) sensitivity, followed by gentamycin (56.7%), and amoxicillin (50%). On the other hand, all the recovered STEC isolates were resistant to cefotaxime, doxycycline, cephalothin, and sulfisoxazole. RAPD fingerprinting using primers OPA-2 and OPA-9 showed that STEC isolates were heterogeneous; they yielded 30 and 27 different clusters, respectively.

Conclusion: Wild birds carry STEC and may add to the contamination of the surrounding environment.

Keywords: antibiotic, eae, random-amplified polymorphic DNA polymerase chain reaction, Shiga toxin producing Escherichia coli, stx1, stx2, wild birds.