Yersinia pestis

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Related to Y. pestis: bubonic plague

Yer·sin·i·a pes·tis

a bacterial species causing plague in humans, rodents, and many other mammalian species and transmitted from rat to rat and from rat to humans by the rat flea, Xenopsylla; it is the type species of the genus Yersinia.
Farlex Partner Medical Dictionary © Farlex 2012

Yer·sin·i·a pes·tis

(yĕr-sin'ē-ă pes'tis)
A bacterial species that causes plague in humans, rodents, cats, and many other mammals; it is transmitted from rat to rat and from rat to human host by as many as 30 species of flea, including the rat flea Xenopsylla; the bacterium can also be transmitted by aerosol droplets dispersed by humans or animals (especially cats) manifesting a pneumonic form of plague, or by deliberate dissemination by means of an aerosol mechanism as a form of bioterrorism; the bacterium is the type species of the genus Yersinia.
Synonym(s): Kitasato bacillus.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


Alexandre Émil Jean, Swiss bacteriologist and surgeon, 1863-1943.
Yersinia enterocolitica - a species causing yersiniosis.
Yersinia pestis - a species causing plague. Synonym(s): Kitasato bacillus
Yersinia pseudotuberculosis - a species causing pseudotuberculosis in birds and rodents; rarely in humans Synonym(s): Pasteurella pestis
yersiniosis - infectious disease caused by Yersinia enterocolitica.
Medical Eponyms © Farlex 2012
References in periodicals archive ?
Y. pestis genomes from the Bronze Age lacked a gene that enabled later forms of the bacterium to survive inside the flea gut.
On September 18, CDPH, IDPH, CDC, and the university initiated a joint investigation to determine the source of Y. pestis infection, identify any potential additional infections, and implement prevention and control measures.
Epizootics spread as Y. pestis is disseminated by blocked fleas as they regurgitate overwhelming doses of organisms into the host which becomes septicemic and dies, forcing blocked starving fleas to seek the next available host.
Thus, a real-time PCR assay based on a unique chromosomal nucleotide sequence found in either Y. pestis or Y.
Plague patients with no history of exposure to rodents can be infected by Y. pestis if their pets carry infected rodent fleas into the home.
The molecular beacons designed to detect Y. pestis (Table 1, probe 1), F.
The woman was hospitalized with fever, septic shock, and a painful right axillary swelling; blood cultures grew Y. pestis. She responded to treatment with gentamicin and levofloxacin.
Using published single-nucleotide polymorphisms (15), we assigned isolates from 2 case-patients and 1 recently sampled rat to the Y. pestis q3 phylogenetic subgroup within group I (node k).
The patient received a presumptive diagnosis of bubonic plague because of her clinical signs and symptoms and the recovery of Y. pestis from her husband's blood culture.
In vitro assays suggest that ciprofloxacin is comparable to streptomycin and superior to doxycycline or gentamicin for killing of intracellular Y. pestis (4), and efficacy has been demonstrated in rodent and nonhuman primate models (8).
That made sense given the life cycle of Y. pestis. The plague bacterium infects and causes disease in rodents.
Additional isolates from postmortem brain, liver, lung, and vitreous fluid cultures were confirmed as Y. pestis at CDC.