Yersinia pseudotuberculosis is a Gram - negative bacterium that causes Far East scarlet - like fever in humans most often through the food - borne route .
Humans occasionally get infected zoonotically .
Yersinia pseudotuberculosis is a Gram - negative bacterium that causes Far East scarlet - like fever in humans , who occasionally get infected zoonotically , most often through the food - borne route .