An epidemiological investigation on occurrence of enterohemorrhagic Escherichia coli in raw milk

Research (Published online: 25-08-2018)

22. An epidemiological investigation on occurrence of enterohemorrhagic Escherichia coli in raw milk

H. D. Vanitha, C. Sethulekshmi and C. Latha

Veterinary World, 11(8): 1164-1170

ABSTRACT

Aim: The aim of the present investigation was to study the epidemiology of enterohemorrhagic Escherichia coli (EHEC) in raw milk and molecular characterization of isolates using multiplex polymerase chain reaction (PCR).

Materials and Methods: A total of 125 raw milk samples were subjected to isolation, identification, and confirmation of virulence-associated genes by multiplex PCR (mPCR). The samples were collected from a milk cooperative society of Thrissur district, Kerala. For further epidemiological investigation, samples such as dung (126), hair coat of cow (60), udder swab (60), udder wash (60), milking utensil wash (36), Milker's hand wash (36), water (36), soil (36), and feed (36) were collected from the households from which the raw milk tested positive for EHEC.

Results: The occurrence of EHEC in individual raw milk samples was found to be 8.8%. The major source of contamination to raw milk was found to be dung (19.84%) followed by udder swab (16.67%), hair coat of cow (15%), Milker's hand and milking utensils and water (11.11% each), and udder wash and soil (8.33% each). For identification of virulence genes, all the isolates were subjected to mPCR, of 75 isolates 73.33% of isolates harbored stx 2 gene while 53.33, 36, and 36% of isolates were encoded by stx 1, eae A, and hly A genes, respectively. On epidemiological survey, the multiple risk factors accountable for occurrence of EHEC in raw milk were found to be the quality of water used, improper and inadequate udder preparation, unhygienic hands of Milker's, use of insufficiently cleaned milking utensils, and using common utensil for washings of udder and milking purposes.

Conclusion: The result of the present study signifies that raw milk was contaminated with EHEC and possesses a high public health threat. As dairy cattle and its environment serve as a potential niche for EHEC, hygienic milking practices should be adopted to curb the occurrence of EHEC in raw milk.

Keywords: Enterohemorrhagic Escherichia coli, epidemiological investigation, epidemiological survey, multiplex polymerase chain reaction, raw milk.

Morphologic and morphometric characteristics of ascaroid worm, Ophidascaris piscatori in Xenochrophis piscator snake in Sidoarjo, Indonesia

Research (Published online: 25-08-2018)

21. Morphologic and morphometric characteristics of ascaroid worm, Ophidascaris piscatori in Xenochrophis piscator snake in Sidoarjo, Indonesia

Lucia Tri Suwanti, Inggarsetya Syah Audini, Setiawan Koesdarto and Emmanuel Djoko Poetranto

Veterinary World, 11(8): 1159-1163

ABSTRACT

Aim: The study was conducted to describe the morphology and morphometry of nematode worm in the stomach of Xenochrophis piscator snake macroscopically and microscopically using light and scanning electron microscopy (SEM).

Materials and Methods: The sample was 40 nematode worms that have been collected from 60 snakes which slaughtered at snake slaughterhouses in Sidoarjo, Indonesia. The worms (10 male and 10 female) were stained with carmine, and the others were sent to Indonesian Science Institute for ultrastructure observation by SEM. Some of the female worms were immersed in physiological NaCl and incubated to collect the worm eggs.

Results: Nematode worm in this study had three lips with almost the same size and it had papillae, so it was included in ascaridoid. The mouth of ascaridoids has three lips, the dorsal bearing two large outer papillae and the each lateroventral with one papilla. The body length and width of the male worm were 70-105 mm and 0.92-1.32, respectively, with head diameter of 0.22-0.28 mm. Dorsal and ventrolateral lips almost have the same size that was 0.10-0.12×0.11-0.13 mm. The length of interlabia was 0.06-0.08 mm, esophagus was 3.21-4 mm, tail was 0.17-0.23 mm, and spicule was 2.12-3.36 mm. The body length and width of the female worm were 85-130 mm and 1.28-1.71 mm, respectively. The head diameter was 0.29-0.38 mm. Dorsal and ventrolateral lips almost have the same size that was 0.13-0.16×0.15-0.19 mm. The interlabial length was 0.08-0.10 mm, esophagus was 3.04-4.67 mm, and tail was 0.22-0.31 mm. The distance of the vulva from the anterior edge was 56-88 mm with an average of 67.35 mm. The eggs have conspicuously pitted with length 0.08-0.09 mm and width 0.07-0.08 mm.

Conclusion: Based on the characteristics of morphology and morphometry, the ascaroid worms found on X. piscator snake from Sidoarjo, Indonesia, were O. piscatori.

Keywords: carmine, Ophidascaris piscatori, scanning electron microscopy, Sidoarjo Indonesia, Xenochrophis piscator snake.

Sporadic cases of lumpy skin disease among cattle in Sharkia province, Egypt: Genetic characterization of lumpy skin disease virus isolates and pathological findings

Research (Published online: 23-08-2018)

20. Sporadic cases of lumpy skin disease among cattle in Sharkia province, Egypt: Genetic characterization of lumpy skin disease virus isolates and pathological findings

Fatma M. Abdallah, Hend M. El Damaty and Gamilat F. Kotb

Veterinary World, 11(8): 1150-1158

ABSTRACT

Background and Aim: Lumpy skin disease (LSD) is a highly infectious viral disease upsetting cattle, caused by LSD virus (LSDV) within the family Poxviridae. Sporadic cases of LSD have been observed in cattle previously vaccinated with the Romanian sheep poxvirus (SPPV) vaccine during the summer of 2016 in Sharkia province, Egypt. The present study was undertaken to perform molecular characterization of LSDV strains which circulated in this period as well as investigate their phylogenetic relatedness with published reference capripoxvirus genome sequences.

Materials and Methods: A total of 82 skin nodules, as well as 5 lymph nodes, were collected from suspect LSD cases, and the virus was isolated in embryonated chicken eggs (ECEs). LSD was confirmed by polymerase chain reactions amplification of the partial and full-length sequences of the attachment and G-protein-coupled chemokine receptor (GPCR) genes, respectively, as well as a histopathological examination of the lesions. Molecular characterization of the LSDV isolates was conducted by sequencing the GPCR gene.

Results: Characteristic skin nodules that covered the whole intact skin, as well as lymphadenopathy, were significant clinical signs in all suspected cases. LSDV isolation in ECEs revealed the characteristic focal white pock lesions dispersed on the chorioallantoic membranes. Histopathologic examination showed characteristic eosinophilic intracytoplasmic inclusion bodies within inflammatory cell infiltration. Phylogenetic analysis revealed that the LSDV isolates were clustered together with other African and European LSDV strains. In addition, the LSDV isolates have a unique signature of LSDVs (A11, T12, T34, S99, and P199).

Conclusion: LSDV infections have been detected in cattle previously vaccinated with Romanian SPPV vaccine during the summer of 2016 and making the evaluation of vaccine efficacy under field conditions necessary.

Keywords: cattle, Egypt, lumpy skin disease, Poxviridae, Sharkia province.

Isolation and identification of bacteria from fresh guava (Psidium guajava) sold at local markets in Mymensingh and their antibiogram profile

Research (Published online: 23-08-2018)

19. Isolation and identification of bacteria from fresh guava (Psidium guajava) sold at local markets in Mymensingh and their antibiogram profile

Md. Atiqur Rahman Sarker, Md. Mazedul Haque, Rafia Afroze Rifa, Fateha Akther Ema, Md. Ariful Islam and Mst. Minara Khatun

Veterinary World, 11(8): 1145-1149

ABSTRACT

Aim: The study was conducted for the isolation, identification, and antibiogram of bacteria obtained from fresh guava (Psidium guajava).

Materials and Methods: A total of 25 fresh guavas were collected from five markets located in Mymensingh city. Guava samples were cultured onto various selective media such as eosin methylene blue, xylose lysine deoxycholate, thiosulfate-citrate-bile salts-sucrose, blood agar, and mannitol salt agar for the isolation of bacteria. Biochemical tests (dextrose, maltose, lactose, sucrose, mannitol, methyl red, Voges-Proskauer, and indole) were performed to identify the bacteria.

Results: Total viable counts of guava were ranged between log 6.56 colony-forming unit (cfu)/ml and 6.62 cfu/ml. A total of 106 bacterial isolates belonged to five genera (Escherichia coli, Salmonella spp., Vibrio spp., Bacillus spp., and Staphylococcus spp.) were identified. Salmonella spp. (23.6%) was the most prevalent, followed by E. coli (22.64%), Bacillus spp. (19.81%), Staphylococcus spp. (17.92%), and Vibrio spp. (16.03%). The results of antibiotic sensitivity test showed that Salmonella spp., Bacillus spp., and E. coli were sensitive to chloramphenicol, ciprofloxacin, and gentamicin and resistant to ampicillin and cephalexin. Vibrio spp. was sensitive to chloramphenicol and gentamicin, intermediately sensitive to ciprofloxacin and ampicillin and resistant to cephalexin.

Conclusion: The results of this study indicate that fresh guava contains multidrug-resistant bacteria which might pose a public health risk.

Keywords: antibiogram profile, bacteria, guava, identification, isolation, Mymensingh.

Slaughter of pregnant goats for meat at Nsukka slaughterhouse and its economic implications: A public health concern

Research (Published online: 17-08-2018)

18. Slaughter of pregnant goats for meat at Nsukka slaughterhouse and its economic implications: A public health concern

Onyinye Josephine Okorie-Kanu, Ekene Vivienne Ezenduka, Christian Onwuchokwe Okorie-Kanu, Chidiebere Ohazurike Anyaoha, Chukwuebuka Anselm Attah, Toochukwu Eleazar Ejiofor and S. Onyinye Onwumere-Idolor

Veterinary World, 11(8): 1139-1144

ABSTRACT

Aim: This study was conducted to determine the incidence rate of the slaughter of pregnant goats in Nsukka slaughterhouse, which has become a major cruel occurrence in Nigeria, as well as it's economic and public health implications.

Materials and Methods: All the goats slaughtered at Nsukka slaughterhouse over a period of 3 months (February-April, 2017) were screened. The data collected were: total number of goats slaughtered, age, breed and sex of goats slaughtered, pregnancy status of the goats, and sex of the fetuses observed, and gestational age of the fetuses estimated by crown-rump length.

Results: In the 3-month study, a total of 684 goats were slaughtered, of which 617 (90.2%) were females. 364 (59%) of the females slaughtered were pregnant, and more than 80% of the gestations were in the second and third trimesters. Of 661 fetuses recorded, 320 (48.3%) were males, and 341 (51.7%) were females with 438 (66.3%) predominantly twins. At the cost of ₦ 6,000 ($16) and ₦ 8,000 ($20) for male and female kids, respectively, a total of ₦ 4,648,000 ($11,620) was lost in just one slaughterhouse in 3 months.

Conclusion: This study shows that there is a high rate of slaughter of pregnant goats in Nsukka slaughterhouse with a tremendous economic loss, and most chevon sold in Nsukka are unwholesome and of low meat quality.

Keywords: economic implications, fetuses, low meat quality, pregnant goats, public health, unwholesome.

Seasonal changes of rumen and intestine morphology of the Qinghai yak (Bos grunniens)

Research (Published online: 16-08-2018)

17. Seasonal changes of rumen and intestine morphology of the Qinghai yak (Bos grunniens)

Bao A. Ding, Shuang Q. Ma, Zong R. Li, Xi L. Li and Stephen R. Madigosky

Veterinary World, 11(8): 1135-1138

ABSTRACT

Aim: The aim of the current study was to investigate the effects of seasonal changes in grass quality on the ruminal and intestinal morphology of male Qinghai yaks.

Materials and Methods: A total of four male yaks with the same age of 4 years old from each season (summer and winter) were randomly selected and slaughtered to determine the effect of different season on intestinal morphology of yak in the Qinghai-Tibetan Plateau.

Results: The histological analysis shows that male yak has the longer and wider papillae in rumen in green season. The height of villi in duodenum and jejunum was significantly higher in green season, and the width of villi on duodenum, jejunum, ileum, and rectum was significantly wider in green season. Surface area of villi and crypt depth in duodenum, jejunum, and ileum was significantly larger and deeper in green season. Submucosa thickness of duodenum, jejunum, ileum, and rectum was significantly thicker in green season. The muscular thickness of jejunum, cecum, and rectum was significantly thicker in green season.

Conclusion: According to this research, we found that the seasonal changes of ruminal and intestinal morphology of yak showed different length and width papillae, villi, crypt, and submucosa. This fact was confirmed the functional advantages resulting from the ability to successfully adapt to a dry climate and diets, flat, open, and cold grassland may allow yak to overcome both water shortage and energy deficiency in winter.

Keywords: green grass, intestine, morphology, Qinghai yak, rumen.

Potency of lactic acid bacteria isolated from balinese bovine (Bos sondaicus) intestinal waste from slaughterhouse to improve nutrient content of wheat pollard as animal feedstuff by fermentation process

Research (Published online: 16-08-2018)

16. Potency of lactic acid bacteria isolated from balinese bovine (Bos sondaicus) intestinal waste from slaughterhouse to improve nutrient content of wheat pollard as animal feedstuff by fermentation process

Widya Paramita Lokapirnasari, Adriana Monica Sahidu, Koesnoto Soepranianondo, Agus Supriyanto, Andreas Berny Yulianto and Anam Al Arif

Veterinary World, 11(8): 1127-1134

ABSTRACT

Aim: The purpose of this study was to know the genetic and biochemical identification of isolated lactic acid bacteria (LAB) from Balinese bovine (Bos sondaicus) intestinal waste, acidity, and ox bile salts and to inhibit the growth pathogen of Staphylococcus aureus and Escherichia coli and the potential of those isolated to improve nutrient value of wheat pollard as animal feed ingredient by fermentation process.

Materials and Methods: This research was divided into three stages. The first stage, isolated LAB were obtained from the bovine intestines at a slaughterhouse in Indonesia. Small intestinal samples were collected from 10 healthy Balinese beef cattle (B. sondaicus). The isolated LAB were identified by VITEK 2, polymerase chain reaction, and 16S rDNA. The basic local alignment search tool (BLAST) was performed to determine the phylogenetic tree. The second stage, the LAB were screened for their tolerance at pH 2, 3, and 4; bile salt, and antagonistic to enteric pathogen. In the third stage, to determine the potency of this isolate to increase nutrient content of wheat pollard by facultative anaerobe fermentation for 3 and 5 days.

Results: The result of the first stage showed that the isolate could be identified as Lactobacillus casei WPL 315. The result of the second stage showed that the isolate tolerance to low pH (pH 2, pH 3, and pH4) for 90 min and 24 h, and this isolate had viability tolerance in 0.3% bile salt. The isolate can inhibit S. aureus and E. coli. The result of the third stage by proximate analysis showed that crude protein increased by 23.08% after fermentation, while crude fiber decreased by 61.24% on the level 0.5% L. casei subsp. WPL 315 in the 3-day fermentation.

Conclusion: Based on the results, it showed that L. casei WPL 315 derived from indigenous intestinal Balinese beef cattle (B. sondaicus) has tolerant characteristic on acidity and ox bile salts, has antagonistic effect against E. coli and S. aureus, and has the ability to increase crude protein and decrease crude fiber content of wheat pollard. It would be interesting to determine whether the strain has a probiotic candidate.

Keywords: Escherichia coli, Lactobacillus casei, probiotics, Staphylococcus aureus, wheat pollard.