Which condition is associated with the spread of psittacosis?

Psittacosis, also known as parrot fever, is primarily associated with exposure to infected birds, particularly psittacine birds such as parrots, as well as other bird species, including pigeons. Handling pigeon droppings can lead to the transmission of the bacteria Chlamydia psittaci, which causes this illness. The bacteria are often present in the feces of infected birds, and when dried droppings are disturbed, they can become aerosolized and inhaled, leading to infection in humans.

The other conditions listed do not have a significant association with the spread of psittacosis. While various animals can transmit different diseases, guinea pigs have not been linked to the transmission of psittacosis, and exposure to contaminated water is more commonly associated with illnesses caused by waterborne pathogens. Lastly, consumption of raw eggs is related to other foodborne illnesses, particularly those caused by Salmonella, rather than psittacosis.