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 Cryptosporidium 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 carried 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
co/i 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. J. Fac. Vet Med. Univ. Tehran. 59, 2: 131-136, 2004.