Yersinia pestis
Y ersinia pestis GENERAL CHARACTERISTICS Gram’s classification – Gram negative Shape – Rod shape (Bacilli) Motility – Non-motile Capsule – Absent Endospores – Absent Respiration – Facultative anaerobic Optimum Temperature – 28 to 30℃ Optimum pH – 7.2 to 7.6 Habitat – Y. pestis has two main habitats in the stomach of proventriculus of various flea species at ambient temperature or the blood or tissues of a rodent host at body temperature. Alexandre Yersin (Swiss physician and bacteriologist) discovered the Yersinia pestis in 1894. PATHOGENIITY OF Yersinia pestis DISEASE TRANSMISSION Plague is an infectious disease caused by the bacteria Yersinia pestis, a zoonotic bacteria, usually found in small mammals and their fleas. It is transmitted between animals through fleas. Humans can be infected through the bite of infected vector...