Yersinia pestis

(redirected from plague bacillus)
Also found in: Dictionary, Thesaurus.

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 ?
With the discovery of the modern plague bacillus, Yersinia pestis, in 1894, the issue seemed resolved: the Black Death was the disease now known as bubonic plague.
Goebbels, terrified of the momentum of the collapse, described the surrender as a 'plague bacillus'.
Endemic plague foci result from circulation of the plague bacillus in its rodent reservoir, the source of human plague cases (1).
The plague bacillus is believed to have originated <20,000 years ago in central Asia (2), from which it has spread on multiple occasions and caused 3 well-documented pandemics (1).
We also reiterate the potential risk for human infection by the plague bacillus (Yersinia pestis) as a result of bed sharing, as illustrated by the case reported from Oregon in 2010 (5).
Mechanisms range from the relatively simple, as with the plague bacillus, Yersinia pestis, to the elaborately intricate, as with parasites in the genera Plasmodium and Leishmania.
Yersinia infections: centennial of the discovery of the plague bacillus. Clin Infect Dis.
The hypothesis of recent importation of the plague bacillus in Kehailia is therefore tempting but is tempered by the fact that 1) the grain is primarily imported from Europe, which is not affected by plague, and from North America where natural foci exist but have very limited areas of overlap with those regions where cereal grains are grown, 2) no higher mortality rate in the murine population of the port was noted, 3) no human cases occurred in this sector of the city, and 4) a 3IS-restriction fragment length polymorphism (11) analysis grouped these strains in a cluster clearly distinct from the strains isolated from Africa and America (V.
Except during the 2 months of August and September 1997, bubo samples arrived at the central plague laboratory in Antananarivo as long as 2 or 3 weeks after being collected, which led to false-negative results because they were contaminated or the plague bacillus had died.