Rickettsia species identified in adult, host-seeking Dermacentor occidentalis (Acari: Ixodidae) from Baja California, Mexico, and Oregon and Washington, United States.

Autor:	Paddock CD; Rickettsial Zoonoses Branch, Centers for Disease Control and Prevention, Atlanta, GA,USA., Zambrano ML; Rickettsial Zoonoses Branch, Centers for Disease Control and Prevention, Atlanta, GA,USA., Clover JR; Biological Consultant, Grants Pass, OR, USA., Ladd-Wilson S; Public Health Division, Oregon Health Authority, Portland, OR, USA., Dykstra EA; Water Resources and Sustainability, City of Tumwater, Tumwater, WA, USA., Salamone A; Water Resources and Sustainability, City of Tumwater, Tumwater, WA, USA., Kangiser D; Water Resources and Sustainability, City of Tumwater, Tumwater, WA, USA., Ayres BN; Rickettsial Zoonoses Branch, Centers for Disease Control and Prevention, Atlanta, GA,USA., Shooter SL; Rickettsial Zoonoses Branch, Centers for Disease Control and Prevention, Atlanta, GA,USA., Karpathy SE; Rickettsial Zoonoses Branch, Centers for Disease Control and Prevention, Atlanta, GA,USA., Kjemtrup AM; California Department of Public Health, Richmond, CA, USA., Beati L; Institute for Coastal Plain Science, Georgia Southern University, Statesboro, GA, USA., Levin ML; Rickettsial Zoonoses Branch, Centers for Disease Control and Prevention, Atlanta, GA,USA., Lane RS; Department of Environmental Science, Policy and Management, University of California, Berkeley, CA, USA., Zazueta OE; State Epidemiologist, Instituto de Servicios de Salud Pública del Estado de Baja California, Mexicali, Baja California, Mexico.
Jazyk:	angličtina
Zdroj:	Journal of medical entomology [J Med Entomol] 2024 May 13; Vol. 61 (3), pp. 781-790.
DOI:	10.1093/jme/tjae023
Abstrakt:	The Pacific Coast tick (Dermacentor occidentalis Marx, 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. occidentalis for the presence of Rickettsia species 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. occidentalis adults 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 Rickettsia 364D, R. bellii, and R. tillamookensis was not detected in specimens from these regions. DNA of R. rhipicephali was detected in D. occidentalis specimens obtained from Ensenada Municipality in Baja California and southwestern Oregon, but not from Washington. All ompA sequences of R. rhipichephali that were amplified from individual ticks in southwestern Oregon were represented by a single genotype. DNA of the Ixodes pacificus rickettsial endosymbiont was amplified from specimens collected in southwestern Oregon and Klickitat County, Washington; to the best of our knowledge, this Rickettsia species 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. (Published by Oxford University Press on behalf of Entomological Society of America 2024.)
Databáze:	MEDLINE
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