In the '16-'17 Microbial Diseases List, they states that "Chlamydiasis" would be one of the bacterial diseases. But, I believe that they are referring to "Chlamydia". Did they misspell the disease name, or was "Chlamydiasis" the former spelling of this disease?
Chlamydiasis, a disease that affects a wide range of bird species, is actually a different disease than Chlamydia, which is a sexually transmitted disease in humans. I believe that they meant Chlamydiasis, the bird disease, but knowing some information on Chlamydia as well wouldn't hurt.