Abstract
Enzyme-linked immunosorbent assay was used to identify the antibodies of toxoplasmosis, brucellosis and chlamydiosis in Nineveh governorate-north of Iraq. Sera from 100 sample of sheep aborted from any reason were randomly collected. The results showed that 32.8%, 56% and 11.2% were positive for toxoplasmosis, brucellosis and chlamydiosis respectively. Percentage of identified and unidentified agents causing abortion were 63% and 37% respectively. First of occurrence of abortion was the most common in the unidentified pathogen (27 cases), however, the repeated occurrence of abortion was almost caused by toxoplasmosis which was 19 cases. Stillbirth was found to be the commonest in brucella infection as compared with other months of abortion or other pathogens causing abortion. Chlamydiosis were the first record in this region. The findings of the current work indicated that toxoplasmosis and brucellosis was widely prevailing and may be the cause of sheep abortion in northern Iraq.