The aim of this investigation was to determine the flock-level and animal-level prevalences of Chlamydophila abortus in sheep from the semiarid region of Northeastern Brazil, as well as to identify risk factors. Blood samples were collected from 476 sheep of 72 flocks in 14 counties in the Sertão mesoregion, state of Paraíba. For the serological diagnosis of Chlamydophila abortus infection the complement fixation test (FC) was carried out. A flock was positive when presented at least one seropositive animal. From the 72 flocks, 38 (52.8%) presented at least one seropositive sheep, and 94 (19.7%) of the 476 animals were seropositive. Participation in animal expositions (odds ratio= 4.31; 95% CI= 1.80-10.35; p=0.011) was identified as risk factor. It is suggested that C. abortus infection is spread in sheep of the region, and based on the risk factor analysis sanitary control in animal expositions is recommended.
Chlamydophila abortus; small ruminants; epidemiology; semiarid of Brazil
