The United States banned the import of birds because of the threat of disease. But they partially lifted the ban in 1967. This organism infects bird taxa other than parrots. It has been identified in at least 140 avian species. Scientists believe that all species of birds can get infected by this organism.
Psittacosis can infect more than just birds.
It has been known that Chlamydia psittaci, the organism that causes psittacosis, it can infect sheep, cattle, horses, goats, dogs, cats, most species of rodentia, and maybe frogs. Approximately 100 cases of human psittacosis are reported each year. About one of them dies every year.