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