| dc.description.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. | en_US |
