Borrelia | bacteria genus | Britannica (original) (raw)

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cause of relapsing fever

• In relapsing fever
  …spiral-shaped bacteria, of the genus Borrelia. The spirochetes are transmitted from one person to another by lice (genus Pediculus) and from animals to humans by soft-bodied ticks of the genus Ornithodoros or by the hard-bodied tick Ixodes scapularis. Epidemics of the disease have occurred during wars,
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description of spirochete

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  In spirochete
  Borrelia includes several species transmitted by lice and ticks and causing relapsing fever (B. recurrentis and others) and Lyme disease (B. burgdorferi) in humans. Spirochaeta are free-living nonpathogenic inhabitants of mud and water, typically thriving in anaerobic (oxygen
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