Yersinia Pestis is a Gram-negative non-motile, non-spore-forming coccobacillus measuring approximately 1.5 μm x 0.75 μm, capable of both aerobic and anaerobic growth. The pathogen can remain viable for days in water or moist soil and can resist drying if protected by mucus or other substances but is killed by a few hours of direct exposure to sunlight.
