Rickettsia prowazekii
Scientific classification
Kingdom: Bacteria Phylum: Proteobacteria Class: Alpha Proteobacteria Order: Rickettsiales Family: Rickettsiaceae Genus: Rickettsia Species: R. prowazekii
Binomial name
Rickettsia prowazekii da Rocha-Lima, 1916

Rickettsia prowazekii is a species of gram negative, rod shaped, aerobic bacteria that is the etiologic agent of epidemic typhus, transmitted in the feces of lice and fleas. R. prowazekii is often surrounded by a protein microcapsular layer and slime layer; the natural life cycle of the bacteria generally involves a vertebrate and an invertebrate host, usually an arthropod. A form of R. prowazekii that exists in the feces of arthropods remains stably infective for months. Henrique da Rocha Lima , a brazilian doctor discovered this bacteria, in 1916. Vaccines against R. prowazekii were developed in the 1940s, and were highly effective in reducing typhus deaths among U.S. soldiers during World War II. Immunity following recovery from infection with, or by immunization against, R. prowazekii is lifelong in most cases. However, R. prowazekii can establish a latent infection, which can reactivate after years or decades. From http://www. ... Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. ... Phyla/Divisions Actinobacteria Aquificae Bacteroidetes/Chlorobi Chlamydiae/Verrucomicrobia Chloroflexi Chrysiogenetes Cyanobacteria Deferribacteres Deinococcus-Thermus Dictyoglomi Fibrobacteres/Acidobacteria Firmicutes Fusobacteria Gemmatimonadetes Nitrospirae Omnibacteria Planctomycetes Proteobacteria Spirochaetes Thermodesulfobacteria Thermomicrobia Thermotogae Bacteria (singular, bacterium) are a major group of living organisms. ... Orders Alpha Proteobacteria    Caulobacterales - e. ... Orders Alpha Proteobacteria    Caulobacterales - e. ... Families Rickettsiaceae Ehrlichiaceae Holosporaceae The Rickettsiales are an order of small proteobacteria. ... Genera Rickettsia Orientia Wolbachia The Rickettsiaceae are a family of bacteria, including most notably the genus Rickettsia. ... Species Rickettsia felis Rickettsia prowazekii Rickettsia rickettsii Rickettsia typhi Rickettsia conorii Rickettsia africae etc. ... In biology, binomial nomenclature is the formal system of naming species. ... Gram-negative bacteria are those that retain crystal violet dye in the Gram staining protocol. ... Look up Aerobic in Wiktionary, the free dictionary. ... Phyla Actinobacteria Aquificae Chlamydiae Bacteroidetes/Chlorobi Chloroflexi Chrysiogenetes Cyanobacteria Deferribacteres Deinococcus-Thermus Dictyoglomi Fibrobacteres/Acidobacteria Firmicutes Fusobacteria Gemmatimonadetes Lentisphaerae Nitrospirae Planctomycetes Proteobacteria Spirochaetes Thermodesulfobacteria Thermomicrobia Thermotogae Verrucomicrobia Bacteria (singular: bacterium) are unicellular microorganisms. ... It has been suggested that this article or section be merged with Epidemic typhus. ... The term capsule in microbiology refers to a layer that lies outside the cell wall of bacteria. ... For other uses, see Green slime (disambiguation). ... Classes and Clades See below Male and female Superb Fairy-wren Vertebrates are members of the subphylum Vertebrata (within the phylum Chordata), specifically, those chordates with backbones or spinal columns. ... Invertebrate is a term that describes any animal without a spinal column. ... Subphyla and Classes Subphylum Trilobitomorpha Trilobita - trilobites (extinct) Subphylum Chelicerata Arachnida - spiders,scorpions, etc. ... Henrique da Rocha Lima (1879–1956) was a Brazilian physician, pathologist and infectologist. ... Combatants Allied powers: China France Great Britain Soviet Union United States and others Axis powers: Germany Italy Japan and others Commanders Chiang Kai-shek Charles de Gaulle Winston Churchill Joseph Stalin Franklin Roosevelt Adolf Hitler Benito Mussolini Hideki Tōjō Casualties Military dead: 17,000,000 Civilian dead: 33,000... Immunity is a medical term that describes a state of having sufficient biological defenses to avoid infection, disease, or other unwanted biological invasion. ... Virus latency is the ability of a pathogenic virus to lie dormant within a cell (latent infection). ...

References

• NIAID Biodefense Research Agenda for Category B and C Priority PathogensPDF (1.44 MiB) National Institutes of Health, National Institute of Allergy and Infectious Diseases. NIH Publication No. 03-5315. (January 2003).