Unfortunately for him and for many other people, he had picked up severe acute respiratory syndrome, or SARS — perhaps directly from an
infected bat or from a small, arboreal
mammal called a civet, common in one of Guangdong's famous «wet markets» that sell
wild animals for food, or else from a person or chain of people ultimately
infected from one of those animal sources.
Dogs can develop heartworm disease by getting bit by a mosquito that has had contact with a heartworm
infected mammal (which includes a large assortment of
wild animals besides just dogs).
The primary hosts are domestic and
wild dogs (wolves, coyotes, foxes, etc.), but it can
infect cats, humans, and other
mammals.