Evaluation of a protocol to reduce the incidence of neonatal calf diarrhoea on dairy herds

摘要: Calf diarrhoea causes substantial economic losses in cattle herds worldwide. Neonatal calves are particularly sensitive to infections with enteropathogens. The present study focused on prevention against the main infectious of neonatal calf i.e. Escherichia coli, rota- and coronavirus, Cryptosporidium parvum. Dairy (n=24) a high percentage scouring (>10%) were included sampled for presence these four To decrease problems among calves, standard protocol was tested 13 (treatment group) where both C. parvum either E. coli or coronavirus identified as being involved, other 11 served control group. consisted 2 points action: preventive vaccination dams administration halofuginone lactate newborn calves. average suffering from (39.7% versus 14.3%, P<0.01) faecal samples positive (34% 11%, P<0.05) differed significantly between treatment after implementation protocol. No significant differences group observed excreting rotavirus before at end trial. Furthermore, risk factors potentially associated development scours determined. Non-significant results obtained effect duration colostral IgG quantity diarrhoea. Passive immunity transfer status measured onset study, non-significant groups.