Get answers to your questions about this form of ehrlichiosis.

On May 31, 2010, a 2-year-old 27-kg neutered male mixed-breed dog was presented to the University of Missouri Veterinary Medical Teaching Hospital's Community Practice clinic for progressive lethargy and difficulty walking of about 4 days' duration.

In many parts of the United States, infection of dogs with the pathogen Ehrlichia ewingii is far more common than infection with the better-known Ehrlichia canis.

Since 1990, more than 22 Bartonella species have been described, of which at least half have been implicated or confirmed as animal or human pathogens.

Dr. Edward Breitschwerdt provides insight into his bartonellosis research.

Of all known organisms, 61% are zoonotic, and of the emerging pathogens, the vast majority are zoonotic organisms.