Organism
There are 11 species in the Yersinia genus; only Y. enterocolitica and
The gastroenteritis caused by Y. pseudotuberculosis.
The Gram-negative bacteria Y. enterocolitica and Y. pseudotuberculosis are tiny and rod-shaped. The first is frequently separated from clinical samples such wounds, faeces, sputum, and mesenteric lymph nodes.
It does not, however, belong to the typical human flora. A sick human appendix has yielded Y. pseudotuberculosis.
The fecal-oral route is used to spread both pathogens.
Animals like pigs, birds, beavers, cats, dogs, and, in the case of Y. enterocolitica, frogs, flies, and fleas, have all been known to harbour these two gastroenteritis-causing species. There have been reports of Y. enterocolitica in environmental sources like soil and water (e.g., ponds and lakes). Most isolates do not cause disease.
Y. enterocolitica may grow at temperatures as low as 4°C because it is psychrotrophic (a type of microbe that thrives at low temperatures). At 30°C, the doubling time is 34 minutes; at 22°C, it is 1 hour; and at 7°C, it is 5 hours. It can withstand freezing and endure for a long time in frozen foods.
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