Bacteriological Load In Milk And Prevalence Of Selected Diseases Of Intensification In Addis Ababa Dairy Farms

A cross sectional investigation of the bacteriological quality of milk and the prevalence of selected diseases of intensification was carried out on 31 intensive farms which were selected as clusters. Data was collected using questionnaire survey, farm observation, clinical examination, CMT, bacterial count, comparative intradermal tuberculin test and milk ring test. The results of this study showed that none of the modern farms (n=31) kept records except one farm. All except three farms were poorly drained and less hygienic. Univariate ANOVA indicated that there was no significant variation observed in the mean log cfu/ml of SPC between the different categories of hygienic practices, availability of potable water and herd size (p>0.05). Herd level prevalence of clinical and subclinical mastitis was 38.75% and 100%, respectively. The prevalence of subclinical mastitis at quarter, cow and herd level was 83.03% (n=1042), 81.8% (n=327) and 100% (n=31), respectively. The prevalence of clinical mastitis at quarter, cow and herd was 3.4% (n=52), 6.5% (n=26) and 38.7% (n=12), respectively. Moreover, 7% of cows were with at least one blind teat and the quarter level teat blindness is 2.81%. Quarter level clinical mastitis was significantly associated with parity number (p

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