Yersinia pseudotuberculosis Yersinia pseu·do·tu·ber·cu·lo·sis (s&oomacr;'dō-t&oobreve;-bûr'kyə-lō'sĭs, -ty&oobreve;-) n. A bacterium that causes acute mesenteric lymphadenitis in humans. Also called Pasteurella pseudotuberculosis.
