2018 Dec 4. doi: 10.1093/jme/tjy213. [Epub ahead of print]

Borrelia parkeri in Ornithodoros parkeri (Ixodida: Argasidae) Collected Using Compact Dry Ice Traps in Madera County, California.


Tick-borne relapsing fever (TBRF) is a potentially serious vector-borne disease endemic to the western United States. Vector surveillance is compromised by the nidicolous life history of the three Ornithodoros species that transmit TBRF to people in this region. Large-scale stationary trapping methods were developed to survey a wide geographical range of Ornithodoros spp. which are known to vector relapsing fever Borrelia spp. in California. Ninety-six Ornithodoros parkeri were collected from four locations in the foothills of Fresno and Madera Counties. Two of these O. parkeri nymphs were PCR positive for Borrelia parkeri, and their collection at a popular recreation site increases the public health concern.


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