The Frequency of the Shedding of Cryptosporidium parvum, F5 Escherichia coli, Rotavirus, Coronavirus and Salmonella spp. in Young Dairy Calves in Mitidja Area (Algeria)

摘要

To estimate the frequency of the shedding of Cryptosporidium parvum, F5 Escherichia coli, rotavirus, coronavirus and Salmonella sp. in 96 dairy farms of Mitidja (Algeria), 220 calves aged from 1 to 45 days (119 diarrheic vs 101 no diarrheic) wereexamined. The results showed that C. parvum was detected in 23,4% of farms against 18.7% for rotavirus, 14.5% for F5 E. coli, 12.5% for coronavirus and 3 for Salmonella. However, C.parvum is the most isolated infectious germ in calves, followed by rotavirus, coronavirus, F5 E. coli and Salmonella with respective rates 23.6%, 13.6%, 10.4%, 10% and 3%. The prevalence of the agents was higher in diarrheic calves than in no diarrheic, 43 against 9 calves (36.13% vs 8.91%) for C.parvum,18 against 4 (21.84% vs 3.96%) for rotavirus, 22 against 1 (18.48% vs 0.09%) for coronavirus, 18 against 4 for F5 E. coli (15.12% vs 3.96%) and 2 against 1 for Salmonella (1.60% vs 0.09%) respectively. However, the age of the calvesseems to play a major role in apparition of different germs. In fact, F5 E.coli was significantly detected in 1-3 days group and rotavirus infection in 4-7 days group. Undeniably, C.parvumwas preferentially affected 8-15 and 14-21days age groups, followed by rotavirus. Moreover, coronavirus and Salmonella were mostly frequent respectively in 22-30 and 31-45 days agesgroups.