Variables Total number Number positive (%) P-value
Age     0.147
Young ≤ 12 months 221 13 (5.9)  
Adult > 12 months 332 12 (3.6)  
Sex     <0.001
Females 244 20 (8.2)  
Males 309 5 (1.62)  
Origin     <0.001
Ambo 54 0  
Bishoftu 246 1 (0.4)  
Addis Ababa area 192 16 (8.3)  
Adama area 61 8 (13.1)  
Total 553 25 (4.5)  
Table 1: Seroprevalence of brucellosis in pigs based on age, sex and origin.