From Bird to Man Dealing With Psittacosis

In the Netherlands the first report on human psittacosis dates from 1930(1). The
import of parrots from Argentina was thought to be the source of infection. This led
to quarantine and hygienic rules for the importation of psittacine birds. Currently psittacosis is a notifiable disease in man and pet birds. The disease is caused by the gram negative intracellular bacterium Chlamydia psittaci. On a yearly base thirty to seventy animal cases and forty to eighty human cases are reported to veterinary or public health authorities, but this might be an underestimation of the actual number of cases. […]