studies on calf diarrhoea in mozambique prevalence of bacterial pathogens研究小腿腹泻患病率在莫桑比克的细菌病原体.pdf

Acta vet. scand. 2004, 45, 27-36. Studies on Calf Diarrhoea in Mozambique: Prevalence of Bacterial Pathogens 1,2 2 3 1 4 2 By S. J. Achá , I. Kühn , P. Jonsson , G. Mbazima , M. Katouli and R. Möllby 1 2 National Veterinary Research Institute (INIVE), Maputo, Mozambique, MTC, Karolinska Institutet, Stock- holm and 3Länsstyrelsen, Nyköping, Sweden, and 4Faculty of Science, University of the Sunshine Coast, Maroochydore, Australia. Achá SJ, Kühn I, Jonsson P, Mbazima G, Katouli M, Möllby R: Studies on calf diarrhoea in Mozambique: Prevalence of bacterial pathogens. Acta vet. scand. 2004, 45, 27-36. – The prevalence of diarrhoea in calves was investigated in 8 dairy farms in Mozambique at 4 occasions during 2 consecutive years. A total of 1241 calves up to 6 months of age were reared in the farms, and 63 (5%) of them had signs of diar- rhoea. Two farms had an overall higher prevalence (13% and 21%) of diarrhoea. Faecal samples were collected from all diarrhoeal calves (n=63) and from 330 healthy calves and analysed for Salmonella species, Campylobacter jejuni and enterotoxigenic Es- cherichia coli (ETEC). Salmonella spp. was isolated in only 2% of all calves. Campy- lobacter was isolated in 11% of all calves, irrespective of health condition, and was more frequent (25%) in one of the 2 diarrhoeal farms (p=0.001). 80% of the isolates were identified as C. jejuni. No ETEC strains were detected among the 55 tested strains from diarrhoeal calves, but 22/55 (40%) strains from diarrhoeal calves and 14/88 (16%)