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Hussein, Mohammed Ali
- Confirmatory Detection of Escherichia coli O157:H7 in Diarrhoeic and Non-Diarrhoeic Calves by using Real Time PCR with Studying the Antimicrobial Susceptibility of These Bacteria
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Authors
Affiliations
1 Department of Internal and Preventive Vet. Medicine, College of Vet. Med., University of Fallujah, IQ
2 Department of Internal and Preventive Vet. Medicine, College of Vet. Med., University of Baghdad, IQ
1 Department of Internal and Preventive Vet. Medicine, College of Vet. Med., University of Fallujah, IQ
2 Department of Internal and Preventive Vet. Medicine, College of Vet. Med., University of Baghdad, IQ
Source
Research Journal of Pharmacy and Technology, Vol 12, No 1 (2019), Pagination: 245-250Abstract
Shiga toxigenic E. coli O157:H7 is one of the Shiga-toxin producing types of E. coli, which can produce disease in man and animals. The aims of this study were to detect O gene (rfbO157) and H gene( fliCH7) and determine the pattern of antimicrobial susceptibility of 32 E. coli O157:H7 isolates. The isolates isolated by conventional culture methods and latex test from faecal samples of 4 calves suffering from diarrhoea and 28 calves apparent normal. DNA was extracted from these isolates and the real time PCR was applied on the extracted DNA for confirming the diagnosis of rfbO157 and flic H7 genes. Seven antimicrobial discs were used in this study. The result presented that all the (32) isolates were possessed the rfbO157 and flics H7 genes. The susceptibility test of the isolates revealed that all isolates were highly resistant to Erythromycin (100%) and Cephalothin (96.87%). Less resistance to Tetracycline, Trimethoprim-Sulfamethoxazole and Chloramphenicol at different percentage (31.25%), (12.5%) and (9.37%) respectively and all isolates showed high sensitivity to Gentamicin (100%), Enrofloxacin (100%). In conclusion, the real time PCR can be used as a sensitive and reliable tool for diagnosis of E. coli O157:H7, and this bacteria showed high resistance to antibiotic.Keywords
E. coli O157:H7, Real Time PCR, rfbO157, flic H7, Antibiotic Susceptibility.
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