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10 July 2020 Distribution and Occurrence of Amblyomma maculatum sensu lato (Acari: Ixodidae) and Rickettsia parkeri (Rickettsiales: Rickettsiaceae), Arizona and New Mexico, 2017–2019
Joy A. Hecht, Michelle E. J. Allerdice, Sandor E. Karpathy, Hayley D. Yaglom, Mariana Casal, R. Ryan Lash, Jesus Delgado-de la Mora, Jesus D. Licona-Enriquez, David Delgado-de la Mora, Kathleen Groschupf, James W. Mertins, Amanda Moors, Don E. Swann, Christopher D. Paddock
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Abstract

Amblyomma maculatum Koch sensu lato (s.l.) ticks are the vector of Rickettsia parkeri in Arizona, where nine cases of R. parkeri rickettsiosis have been identified since the initial case in 2014. The current study sought to better define the geographic ranges of the vector and pathogen and to assess the potential public health risk posed by R. parkeri in this region of the southwestern United States. A total of 275 A. maculatum s.l. ticks were collected from 34 locations in four counties in Arizona and one county in New Mexico and screened for DNA of Rickettsia species. Rickettsia parkeri was detected in 20.4% of the ticks, including one specimen collected from New Mexico, the first report of R. parkeri in A. maculatum s.l. from this state.This work demonstrates a broader distribution of A. maculatum s.l. ticks and R. parkeri in the southwestern United States than appreciated previously to suggest that R. parkeri rickettsiosis is underrecognized in this region.

Published by Oxford University Press on behalf of Entomological Society of America 2020. This work is written by (a) US Government employee(s) and is in the public domain in the US.
Joy A. Hecht, Michelle E. J. Allerdice, Sandor E. Karpathy, Hayley D. Yaglom, Mariana Casal, R. Ryan Lash, Jesus Delgado-de la Mora, Jesus D. Licona-Enriquez, David Delgado-de la Mora, Kathleen Groschupf, James W. Mertins, Amanda Moors, Don E. Swann, and Christopher D. Paddock "Distribution and Occurrence of Amblyomma maculatum sensu lato (Acari: Ixodidae) and Rickettsia parkeri (Rickettsiales: Rickettsiaceae), Arizona and New Mexico, 2017–2019," Journal of Medical Entomology 57(6), 2030-2034, (10 July 2020). https://doi.org/10.1093/jme/tjaa130
Received: 13 March 2020; Accepted: 3 June 2020; Published: 10 July 2020
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KEYWORDS
Arizona
New Mexico
Rickettsia parkeri
tick-borne disease
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