Some virulence factors of Escherichia coli isolated from diarrheic calves | ||||
| Journal of Veterinary Medical Research | ||||
| Article 8, Volume 25, Issue 1, June 2018, Page 92-99 PDF (550.25 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jvmr.2018.43305 | ||||
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| Authors | ||||
| Ghada Sayed Ibrahim Osman1; Walid H. Hassan2; Ragab Azzam3; Abeer Ahmed El-Sayed Shehata4 | ||||
| 1Research Assistant Department of Microbiology, Animal Health Research Institute Beni-Suef Laboratory | ||||
| 2Professor of Bacteriology, Mycology and Immunology - Faculty of Veterinary Medicine, Beni-Suef University | ||||
| 3Professor of Infectious Diseases - Faculty of Veterinary Medicine, Beni-Suef University | ||||
| 4Senior Researcher - Department of Bacteriology, Animal Health Research Institute El_Fayoum Laboratory | ||||
| Abstract | ||||
| Escherichia coliare the most common cause of diarrhea in calves. Diarrhea in calvesremains one of the most important problems faced by livestock, causing great economic losses. Some strains ofE. coli characterized by the presence of specific virulence factors including haemolysin production, resistance to bactericidal effects of serum and Congo red binding activity. In this studyfecal samples were collected from 115 diarrheic calves aged from 3 days to one year and from different localities in Egypt along the period from February to August 2015.The prevalence of E. coli in diarrheic calves was 72.2%. 39.8% of isolated E. coli were haemolytic to sheep blood agar, 68.7% were serum resistant, 100% showed Congo red binding activity. | ||||
| Keywords | ||||
| Escherichia coli; prevalence; haemolysin; serum bactericidal resistance; Congo red binding | ||||
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