| Autor: |
Paddock, Christopher D, Zambrano, Maria L, Clover, James R, Ladd-Wilson, Stephen, Dykstra, Elizabeth A, Salamone, Amy, Kangiser, David, Ayres, Bryan N, Shooter, Savannah L, Karpathy, Sandor E, Kjemtrup, Anne M, Beati, Lorenza, Levin, Michael L, Lane, Robert S, Zazueta, Oscar E |
| Zdroj: |
Journal of Medical Entomology; May 2024, Vol. 61 Issue: 3 p781-790, 10p |
| Abstrakt: |
The Pacific Coast tick (Dermacentor occidentalisMarx, 1892) is a frequently encountered and commonly reported human-biting tick species that has been recorded from most of California and parts of southwestern Oregon, southcentral Washington, and northwestern Mexico. Although previous investigators have surveyed populations of D. occidentalisfor the presence of Rickettsiaspecies across several regions of California, populations of this tick have not been surveyed heretofore for rickettsiae from Baja California, Oregon, or Washington. We evaluated 1,367 host-seeking, D. occidentalisadults collected from 2015 to 2022 by flagging vegetation at multiple sites in Baja California, Mexico, and Oregon and Washington, United States, using genus- and species-specific assays for spotted fever group rickettsiae. DNA of Rickettsia364D, R. bellii, and R. tillamookensiswas not detected in specimens from these regions. DNA of R. rhipicephaliwas detected in D. occidentalisspecimens obtained from Ensenada Municipality in Baja California and southwestern Oregon, but not from Washington. All ompA sequences of R. rhipichephalithat were amplified from individual ticks in southwestern Oregon were represented by a single genotype. DNA of the Ixodes pacificusrickettsial endosymbiont was amplified from specimens collected in southwestern Oregon and Klickitat County, Washington; to the best of our knowledge, this Rickettsiaspecies has never been identified in D. occidentalis. Collectively, these data are consistent with a relatively recent introduction of Pacific Coast ticks in the northernmost extension of its recognized range. |
| Databáze: |
Supplemental Index |
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