Which of the following birds can be a source of Psittacosis?

Cockatiels are indeed known to be a source of Psittacosis, which is an infectious disease caused by the bacterium Chlamydia psittaci. This disease commonly affects birds, particularly those in the parrot family, and can be transmitted to humans who handle infected birds or are in close proximity to them. Psittacosis can manifest in humans as a flu-like illness, and it is important for those who work with or care for birds to be aware of its potential for zoonotic transmission.

While other birds, such as pigeons, can carry related diseases or serve as reservoirs for other infections, it is the parrot family, including cockatiels, which is most specifically associated with Psittacosis. Chickens and geese do not typically carry this pathogen, further underscoring the link of Psittacosis primarily with parrots and their relatives. Understanding the specific associations of diseases with different bird species is crucial for environmental health professionals in order to assess risks and implement appropriate preventive measures.