ABSTRACT
Objective: study on the presence of Escherichia coli, Coccidia and Cryptosporidium in stool samples of neonatal diarrheic calves in Ghaemshahr and Babol, simultaneous shedding of Coccidia and Cvyptosporidium with Escherichia coli in these calves, serotyping of Escherichia coli, comparison of antibiotic sensitivity of K99+ and other serotypes of Escherichia coli
Animals: ninety three diarrheic neonatal calves [under one month]
Procedure: taking stool sample from rectum of the diarrheic calves, using standard methods for detection of Coccidia and Cryptosporidium, isolation of Escherichia coli canied out by using standard bacteriological methods and serotyping and antibiotic sensitivity test of isolates
Statistical analysis: results were reported by descriptive scales
Results: Escherichia coli were isolated from 40.8% of diarrheic calves from which only one isolate were K99+ [1.07%]. In 12 samples two pathogens have been diagnosed simultaneously which in 6 samples E. coli and Coccidia [6.4%] and 6 samples E. coli and Cryptosporidium [6.4%] have been isolated. Isolated Escherichia coli were resistant to many antibiotics which routinely used in treatment of diarrhea and there was no significant difference between K99+ and other isolates of Escherichia coli in antibiotic sensitivity test
Clinical implications: from the results of this study it seems that K99+ Escherichia coli is not a common isolate in neonatal diarrheic calves in Ghaemshahr and Babol