Viable echerichia coli counts in chicks experimentally exposed to dust and ammonia
2005
Harish, B.R. | Vijayasarathi, S.K. | Gowda, R.N. Sreenivas | Rao, S. | Satyanarayan, M.L.
The effects of ammonia, dust and E.coli on the normal respiratory tract of broiler chicks were investigated in the present study. Fifteen chicks of Group I were exposed to ammonia at the rate of 175-200 ppm/lit of air. Whereas Group II chicks were exposed to dust at the concentration of 6 mg/cu. ft. Group III chicks received both ammonia and dust. Whereas chicks of Group IV were exposed to E. coli (5 x 10 organisms/ml) and dust. The chicks of Group V were exposed to dust, ammonia and E. coli. Three chicks from each groups including controls were sequentially sacrificed at 24 hourly interval up to 120 hours. The mean viable counts were found to be statistically significant (P0.05) in the various treatment groups at several time points as compared to the controls. Further viable E. coli count was noticed to be highest in the Group V chicks exposed to dust, ammonia and E.coli. The least viable E.coli count was recorded in Group II chicks exposed to dust alone.
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