Abstract: Chlamydiae can infect a large number of animals. But sheep, swine and cattle are easy infection. The syndrome of the disease from female animals is mainly abortion and orchitis from male animals. In China, six provinces had reported about sheep chlamydiae, 15 provinces had reported about swine chlamydiae and 11 provinces had reported about cattle chlamydiae, which caused a huge economy loss. So it is necessary to recognise and prevent the disease during the process of animal industry.

Key words: chlamydiae; sheep; cattle; swine; epidemic