بررسي فراواني فيمبريه F5 در باكتري هاي E. COLI جدا شده از گوساله هاي مبتلا به اسهال در شهرستان اراك

Survey of F5 fimbriae in Escherichia coil isolated from diarrhea) calves in Arak city(lran)

Escherichia cob is one of the common agents of diarrhea in new born calves. Bacteria has characteristics which from them, the presence of fimbriae is very important. The purpose of this research was determination of prevalence of F5 timbriae in isolated bacteria from diarrhea) calves. In this research, 234 fecal samples were collected from diarrheal calves with less than one month old. After isolation of E.coli, the presence of F5 fimbriae in isolated bacteria was examined by specific antiserum (F5 antiserum). From 234 samples 21 cases (9%) were positive. Frequency of positive cases was 19% in calves with less than 5 days old and 5% in calves with more than 5 days old, also frequency of positive cases in rural dairy farms (20%) was significantly higher than industrial dairy fauns (2/6%). According to results, E. coli plays role in calves diarrhea in Arak city and it must be noted.