A disease of birds which can be passed to humans as a form of pneumonia.
An infection of birds with the micro-organism known as Chlamydia psittaci, which is transmissible to humans.
Any acute, generalized, infectious disease of birds and domesticated fowls sometimes communicated to humans.
An ailment affecting birds, induced by the microorganism Chlamydia Psittaci, which can lead to psittacosis in humans.