rickettsias

• plural

  plural

  The grammatical form denoting more than one person, place, thing, or idea.

  of rickettsia.
  rickettsia

  noun

  any member of the genus Rickettsia, comprising rod-shaped to coccoid microorganisms that resemble bacteria but can be as small as a large virus and reproduce only inside a living cell, parasitic in fleas, ticks, lice, and mites and transmitted by bite to vertebrate hosts, including humans, causing such severe diseases as typhus and Rocky Mountain spotted fever.

Example Sentences

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rickettsias

Like Chloromycetin, it deals with many of the rickettsias.

From Time Magazine Archive

Chloramphenicol plugged a big gap in the antibiotic field: it proved particularly deadly against the rickettsias, untouched by either penicillin or streptomycin.

From Time Magazine Archive

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