STUDY ON CALF MORBIDITY AND MORTALITY ON FARM CONDITION WITHSPECIAL EMPHASIS ON COLIBACILLOSIS

Abstract

farms worldwide especially in the dairy farms including Bangladesh. The present study was conducted in different dairy farms of Sylhet sadar upzilla. About 121 calf of different ages were selected where sick calf manifesting the characteristics clinical sign of colibacillosis. (The calves were started to show signs of disease as the watery diarrhea persists and became weak, depressed and lose its appetite. The eyes may become sunken and the calf unable to stand etc). From thirteen dairy farms in Sylhet sadar upazilla rectal swab of sick calves were collected aseptically in sterile test tubes. After collection of swab from affected calf, the test tube kept in incubator for 24 hours for further bacteriological examination. Out of 121 samples 75 were observed affected with colibacillosis. The overall morbidity of calf colibacillosis was 61.98% and mortality were 00.00%. Data analysis showed that the calf colibacillosis in dairy farms due to many factors such as age was the only risk factor (calf factor) which was highly significantly (X =13.003, P-value =0.000) washing of udder just before sucking milk to calf was statistically highly significant (X 2 =7.373, P-value =0.007) which means washing of udder just before sucking milk to calf lowers the calf morbidity due to colibacillosis. Milk replacer sanitation was statistically significant (X 2 =6.5, P-value = 0.011) water supply to the calf was statistically significant (X 2 =4.247, P-value =0.039) which means hygienic water supply to calf lowers the calf morbidity due to colibacillosis. Proper drainage system(X 2 =4.069, P-value = 0.044) and daily use of disinfectant in farm premises (X 2 2 =6.163, P-value =0.013). The mortality of calf due to colibacillosis was null because of proper treatment, knowledge of management of diseased calf and availability of veterinarians. Morbidity and mortality of calf colibacillosis in different dairy farm at Sylhet sadar upazila were 61.98% and 0.00% respectively.