Stained placental smear shows coccoid elementary bodies. Chlamydiosis is characterized by abortion during the last month of gestation. The disease is also called Enzootic Abortion of Ewes (EAE) and is caused by a bacterium of the Chlamidiaceae family, Chlamydophila abortus (previously Chlamydia psittaci). The agent is not a virus, but it does have a virus-like life cycle.
Drost M (1974)