Which pathogen is linked to exposure to birds?

Chlamydophila psittaci is a pathogen primarily associated with exposure to birds, particularly parrots and other psittacine birds. It is the causative agent of psittacosis, which is an infectious disease that can be transmitted to humans from infected birds through inhalation of dried secretions or inhalation of aerosols containing the bacteria. When individuals, such as pet owners, avian veterinarians, or those in close proximity to birds, become infected, they may experience symptoms ranging from mild flu-like symptoms to severe pneumonia.

In contrast, other pathogens listed, while they may also have zoonotic origins, are linked to different animal exposures or environments. Histoplasma capsulatum is more commonly associated with exposure to bat droppings or bird feces but is not specific to bird exposure alone. Coxiella burnetii is linked to cattle and sheep, while Francisella tularensis is primarily linked to rodents and lagomorphs (like rabbits). Thus, Chlamydophila psittaci is the most accurately associated with bird exposure among the options provided.