what are the characteristics of Yersinia
Yersinia pestis (formerly Pasteurella pestis) is a Gram-negative, rod-shaped coccobacillus, a facultative anaerobic bacterium that can infect humans and animals.It causes the deadly disease named plague.. pestis was discovered in 1894 by Alexandre Yersin, a Swiss / French physician and bacteriologist from the Pasteur Institute, during an epidemic of plague in Hong Kong. Yersin was a member of the Pasteur school of thought.