NCIt definition : A species of gram negative, obligately intracellular, spherical shaped bacteria belonging
to the phylum Chlamydiae. This species survives outside of its host as an elementary
body. C. psittaci is pathogenic, being the causative agent of endemic avian chlamydiosis
and epizootic infection in mammals.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Chlamydophila psittaci.;