Query: NC_017062:508500 Rickettsia typhi str. B9991CWPP chromosome, complete genome Lineage: Rickettsia typhi; Rickettsia; Rickettsiaceae; Rickettsiales; Proteobacteria; Bacteria General Information: This genus, like other Rickettsial organisms such as Neorickettsia and Anaplasma, is composed of obligate intracellular pathogens. The latter is composed of two organisms, Rickettsia prowazekii and Rickettsia typhi. The bacteria are transmitted via an insect, usually a tick, to a host organism, in this case humans, where they target endothelial cells and sometimes macrophages. They attach via an adhesin, rickettsial outer membrane protein A, and are internalized where they persist as cytoplasmically free organisms. Transovarial transmission (from mother to offspring) occurs in the invertebrate host. This organism causes murine typhus and is an obligate intracellular pathogen that infects both the flea vector and hosts such as human, rat, and mouse. R. prowazekii, and genomic comparisons demonstrate colinearity and similarity to the genome of that organism except for two independent inversions near the origin and terminus. In the flea vector, the bacterium penetrates the gut epithelial barrier and is found in the feces which become infective.
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General Information: Staphylococcus haemolyticus JCSC1435 was isolated from a Japanese inpatient at Juntendo Hospital, Tokyo, in 2000. This strain is a highly resistant strain which has been shown to generate spontaneous antibiotic sensitive mutants. Causes opportunistic infections in humans. Staphylcocci are generally found inhabiting the skin and mucous membranes of mammals and birds. Some members of this genus can be found as human commensals and these are generally believed to have the greatest pathogenic potential in opportunistic infections. Staphylococcus haemolyticus was originally isolated from human skin and traditionally considered to be a nonpathogenic commensal. Recently this organism has been recognized as a pathogen in animals and humans. It is known to be involved in opportunistic infections associated with the implantation of foreign bodies, paticularly in those with compromised immune systems. Resistance to multiple antibiotics has been observed in clinical isolates and it is possible S. haemolyticus could serve a donor or resistance genes to other more virulent staphlococci.