General Information: Causes glanders in horses. This organism is rarely associated with human infection, and is more commonly seen in domesticated animals such as horses, donkeys, and mules where it causes glanders, a disease first described by Aristotle. The pathogen is host-adapted and is not found in the environment outside of its host. Rapid-onset pneumonia, bacteremia (spread of the organism through the blood), pustules, and death are common outcomes during infection. No vaccine exists for this potentially dangerous organism.