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Exp Appl Acarol. 2008 Jan;44(1):57-60. doi: 10.1007/s10493-008-9128-z. Epub 2008 Feb 5.

Molecular evidence for a novel Coxiella from Argas monolakensis (Acari: Argasidae) from Mono Lake, California, USA.

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Department 3354, College of Agriculture, USDA-ARS-ABADRL, 1000 E University Ave, Laramie, WY 82071, USA.


Argasid ticks are vectors of viral and bacterial agents of humans and animals. Recent reports indicate that some ornithophilic argasids harbored rickettsial agents. A Nearctic tick, Argas monolakensis Schwan, Corwin, Brown is ornithophilic and has not previously been examined for rickettsial agents. Thirty adult A. monolakensis were tested by PCR for DNA from Rickettsia or Coxiella. Amplicons from a Coxiella sp. that were divergent from Coxiella burnetii were detected in 16/30 A. monolakensis. These molecular isolates were similar but not identical to C. burnetii, the Coxiella spp. of other ticks, and "Coxiella cheraxi" a pathogen of crayfish.

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