Ornithosis, a disease of birds that can be transmitted to humans, is caused by
Psittacosis is an infectious disease usually transmitted to humans from birds in the parrot family, turkeys and pigeons. Birds in the parrot family, or psittacines, include parrots, macaws, budgerigars (parakeets), and cockatiels.The disease is caused by a bacteria called Chlamydophila psittaci.sittacosis is an infectious disease usually transmitted to humans from birds in the parrot family, turkeys and pigeons. Birds in the parrot family, or psittacines, include parrots, macaws, budgerigars (parakeets), and cockatiels.