Research Article
Prevalence and Bacterial Isolates of Mastitis in Dairy Farms in Selected Districts of Eastern Harrarghe Zone, Eastern Ethiopia
Table 4
The prevalence of both clinical and subclinical mastitis in milking cows based on age, stage of lactation, parity number, and breed.
| Host risk factors | Total number of animals examined | Number of animals affected | Prevalence (%) | | value |
| Age | | | | | | Young adult | 153 | 48 | 31.4 | 43.449 | 0.000 | Adult | 195 | 130 | 66.7 | Old | 36 | 21 | 58.3 |
| Lactation | | | | | | Early | 152 | 77 | 50.7 | 3.808 | 0.149 | Mid | 80 | 49 | 61.3 | Late | 152 | 73 | 48.0 |
| Parity number | | | | | | 1 calf | 126 | 40 | 31.7 | 32.428 | 0.000 | 2 calves | 101 | 58 | 57.4 | 3 calves | 53 | 37 | 69.8 | 4 calves | 59 | 36 | 61.0 | 5 calves | 37 | 23 | 62.2 | 6 calves | 8 | 5 | 62.5 |
| Breed | | | | | | Cross | 327 | 170 | 52.0 | 0.024 | 0.877 | Local | 57 | 29 | 50.9 |
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