What does yersinia mean?
Yersinia is a genus of Gram-negative bacteria in the family Yersiniaceae. Its best-known member, Yersinia pestis, causes plague, while other species can produce intestinal illnesses collectively known as yersiniosis. The name honors Alexandre Yersin, the Swiss-French bacteriologist who isolated the plague bacterium during the 1894 Hong Kong outbreak. In scientific writing, the generic name is capitalized and italicized: Yersinia. In general prose it may be treated as an ordinary common noun and written in lowercase, especially when referring to an organism or an infection without identifying a particular species. Public-health discussions often concern foodborne outbreaks associated with Yersinia enterocolitica and Yersinia pseudotuberculosis, although exposure does not always result in illness. Recognizing that Yersinia names an entire genus, rather than one bacterium, prevents confusion between the broad category and its especially notorious member, Y. pestis.
nounAny bacterium of the genus Yersinia, a group of Gram-negative bacteria that includes species causing plague, yersiniosis, and certain foodborne infections.
- A bacterium belonging to the genus Yersinia, including the species responsible for plague, yersiniosis, and some foodborne illnesses.
"The specimen was sent for testing after clinicians suspected a Yersinia infection."
"Laboratory testing confirmed that the patient had a Yersinia infection."
"Yersinia pestis is the plague bacterium within the genus Yersinia."
Yersiniae is the traditional Latinized plural, while yersinias is also used.
"The culture contained several Yersiniae."
Yersinia pestis was isolated by Alexandre Yersin during the 1894 Hong Kong plague outbreak—and the genus now bears his name.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of yersinia
The name Yersinia was formed from the surname Yersin with the taxonomic suffix -ia in honor of the bacteriologist Alexandre Yersin. The binomial Yersinia pestis combines that commemorative genus name with the Latin word pestis, meaning “plague” or “pestilence.”
How yersinia is actually used
In formal scientific writing, Yersinia is capitalized and italicized when it names the taxonomic genus. In general prose, it may appear in lowercase when used as an ordinary common noun, although usage varies between medical and scientific publications.