American Veterinary Medical Association
"Compendium of Measures to Control Chlamydia psittaci Infection Among Humans (Psittacosis) and Pet Birds (Avian Chlamydiosis), 2001" provides comprehensive information.

CDC: Psittacosis
Concise information from the Centers for Disease Control Division of Bacterial and Mycotic Diseases (U.S.).

CCOHS Answers: Psittacosis
Information on the disease in birds and humans, and safety measures to prevent transmission, from the Canadian Centre for Occupational Health and Safety.

Fact Sheet: Psittacosis
Information from the Wisconsin Department of Health and Family Services.

Hawaii Department of Health
FAQs on psittacosis.

NYC Department of Health
Concise information from the New York City Department of Public Health Bureau of Communicable Disease.

South Dakota Dept. of Health
FAQs about psittacosis, from the South Dakota Department of Health - Office of Disease Prevention.