Coccidioides immitis is a topic covered in the Johns Hopkins Antibiotic (ABX) Guide.

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  • Dimorphic fungus: large spherule 15-75µm diameter often containing endospores 2-5 µm in diameter at 37°C [ Fig].
  • Prefers warm but dry environs; low deserts.
  • C. immitis found only in San Joaquin Valley while closely related C. posadasii is found elsewhere in desert regions of southwest U.S. Mexico, and Central/South America.
  • Grows readily on standard fungal media.

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Last updated: February 2, 2012