Volume 84, Issue 2
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



A recurrent focus of infestation was investigated in a suburban area of southern California after reports of suspected Rocky Mountain spotted fever in two dogs on the same property. Abundant quantities of were collected on the property and repeatedly from each dog, and DNA was detected by polymerase chain reaction (PCR). Whole blood and serum samples from four dogs were tested by using PCR and microimmunofluorescent assay for antibodies against spotted fever group rickettsiae. Serum samples from all four dogs contained antibodies reactive with , , , and 364D but no rickettsial DNA was detected by PCR of blood samples. Serum cross-absorption and Western blot assays implicated as the most likely spotted fever group rickettsiae responsible for seropositivity. To our knowledge, this is the first detection of in ticks in California.


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  • Received : 22 Jun 2010
  • Accepted : 01 Nov 2010

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