In non-psittacine birds, which species are most frequently reservoirs for Chlamydia psittaci?

• A. Pigeons and Doves
• B. Parrots
• C. Cockatiels
• D. Budgerigars

Answer: (A)

Pigeons and doves are the most frequent reservoirs for Chlamydia psittaci in birds that are not psittacines. These species are widespread in urban and suburban environments and commonly shed the organism in feces and respiratory secretions, leading to contamination of roosts, feed areas, and buildings. People can inhale dried droppings or dust containing the bacteria, making exposure more likely in settings where pigeons and doves Congregate. The other options refer to psittacine birds (parrots and related species), which are not the non-psittacine group this question targets. Thus, pigeons and doves best fit the scenario.