| Autor: |
Osborne, Cameron J, Wakeman-Hill, Alya J, Loa, Steven E, Crosbie, Paul R, Van Laar, Tricia A |
| Zdroj: |
Journal of Medical Entomology; September 2020, Vol. 57 Issue: 5 p1596-1603, 8p |
| Abstrakt: |
Tick-borne disease surveillance in North America has long focused on Lyme disease, though there is currently a significant shift towards comprehensive pathogen surveillance in ticks. Central California has often been overlooked in regular tick-borne pathogen surveillance despite the presence of numerous medically important tick species. The bacterial genus Rickettsiacontains tick-borne species that are known pathogens, such as those in the spotted fever group; nonpathogenic endosymbionts; and many species with unknown pathogenic potential. Five common tick species (Ixodes pacificusCooley and Kohls [Acari: Ixodidae], Dermacentor occidentalisMarx [Acari: Ixodidae], D. variabilisSay, Rhipicephalus sanguineusLatreille [Acari: Ixodidae], and Ornithodoros parkeriCooley [Acari: Argasidae]) of California were collected by both traditional and modern techniques, and subsequently screened for Rickettsiaspp. Many individuals from all five tick species were PCR positive for Rickettsiaspp., and a combination of species-specific primers, a restriction fragment length polymorphism assay, and DNA sequencing was used to further characterize the species composition in these ticks. Probable Rickettsia philipii(Rickettsia364D) was detected in one (1.56%) D. occidentaliscollected in Fresno County; R. rhipicephaliwas detected in 23.4% of D. occidentalisfrom Fresno Co.; R. belliiwas detected in 88.2% of D. variabilis, 7.8% of D. occidentalis, and in one R. rhipicephalus(1.1%) from Fresno Co.; R. monacensisstr. Humboldt was detected in three (100%) of I. pacificuscollected in both Fresno and Madera Co.; and an uncharacterized Rickettsiawas detected in (26.4%) of O. parkericollected in both Fresno and Madera Co. The findings in this study highlight the need for ongoing surveillance in this region of California. |
| Databáze: |
Supplemental Index |
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