Risk factors associated with E. coli causing neonatal calf diarrhea |
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Authors: | Safaa Abd El-Moneim Mohammed Sherif Abd El-Moneimb Marouf Ahmed M Erfana Jakeen Kamal Abd El-Haleem El-Jakee Ashgan M Hessain Turki M Dawoud Saleh A Kabli Ihab M Moussa |
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Institution: | 1. Animal Health Research Institute, Giza 12618, Egypt;2. Department of Microbiology, Faculty of Veterinary Medicine, Cairo University, Egypt;3. Department of Health Science, College of Applied Studies and Community Service, King Saud University, P.O. Box 22459, Riyadh 11495, Saudi Arabia;4. Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;5. Department of Biology, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, Saudi Arabia |
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Abstract: | Calf diarrhea is one of the major health challenges in cattle herds. The bacteriological examination of fecal samples collected from apparently healthy and diarrheic calves' revealed isolation of 26 E. coli isolates out of 56 calves with an incidence of 46.4%. Serogroups O1, O26, O44, O55, O115, O119, O125, O146, and O151 were identified from the collected fecal samples. Using PCR all isolates was positive for ompA gene species specific for E. coli. While stx1 and eaeA genes detected with incidence of 3.8 and 19.2% respectively from the isolates. The presence of stx2 gene was negative in the fecal isolates. Among colostrum samples 4 E. coli isolates were detected and serogrouped to O26, O55 and O119. They were negative for eaeA, stx1 and stx2 except strain number 4 (O55) was positive for stx1. E. coli strains were sensitive to norfloxacin (80.7%) and resistant to ampicillin and cefotaxime (100% each). Based on our findings, there was no association between occurrence of E. coli and age of calf (2–14 days), while bottle feeding calf colostrum may be a source of E. coli contamination. |
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Keywords: | Corresponding author Risk factors Calves Colostrum Sensitivity test |
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