Ectoparasite diversity and exposure to vector-borne disease agents in wild rodents in central coastal California

Nathan C. Nieto, Haydee Dabritz, Patrick Foley, Niki Drazenovich, Lee Calder, Jennifer Adjemian, Patricia A Conrad, Janet E Foley

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A survey of wild rodents was performed in the Morro Bay area of central coastal California to determine serological and polymerase chain reaction (PCR) prevalence of Anaplasma phagocytophilum Dumler, Barbet, Bekker, Dasch, Palmer, Ray, Rikihisa, and Rurangirwa, Borrelia burgdorferi Johnson, Schmidt, Hyde, Steigerwalt, and Brenner, Francisella tularensis McCoy, and Yersinia pestis Yersin; to describe the ectoparasitic fauna on important vector-borne disease hosts; and to determine whether pathogen exposure was associated with infestation by ectoparasites. We trapped 411 rodents from 10 species in 2004 and 2005. Anaplasma phagocytophilum exposure was detected in 11% of all wild rodents tested, with seropositive animals in eight species. Anaplasma phagocytophilum DNA was detected by PCR amplification in Neotoma fuscipes Baird and Reithrodontomys megalotis Baird (0.6% of all rodents). Yersinia spp. exposure was identified in 3.2% of all rodents tested, with highest detected exposure in peridomestic rodents, Mus musculus L. (20%), and Rattus rattus L. (50%). No individuals tested positive for the Y. pestis pla gene by PCR. In total, 338 fleas were identified from each of 10 rodent species examined. The most abundant flea was Malareus telchinus Rothschild. Relative density of flea infestation was highest on Spermophilus beecheyi Richardson and Microtus californicus Peale. Ticks recovered from trapped animals included Ixodes angustus Neumann, Ixodes pacificus Cooley & Kohls, Ixodes spinipalpis Hadwen & Nuttall, and Dermacentor occidentales Marx. Given the moderate climate and diversity of rodents and arthropods in the Morro Bay area, ongoing investigation of this region will be helpful in understanding disease maintenance cycles.

Original languageEnglish (US)
Pages (from-to)328-335
Number of pages8
JournalJournal of Medical Entomology
Volume44
Issue number2
StatePublished - Mar 2007

Fingerprint

Disease Vectors
vector-borne diseases
ectoparasites
Rodentia
rodents
Anaplasma phagocytophilum
Ixodes
Siphonaptera
Yersinia pestis
polymerase chain reaction
Polymerase Chain Reaction
Flea Infestations
Spermophilus beecheyi
Ixodes pacificus
Dermacentor
Sigmodontinae
Francisella tularensis
Neotoma
Yersinia
Sciuridae

Keywords

  • Anaplasma phagocytophilum
  • Fleas
  • Ixodes spp. Ticks
  • Yersinia pestis

ASJC Scopus subject areas

  • Insect Science
  • veterinary(all)

Cite this

Nieto, N. C., Dabritz, H., Foley, P., Drazenovich, N., Calder, L., Adjemian, J., ... Foley, J. E. (2007). Ectoparasite diversity and exposure to vector-borne disease agents in wild rodents in central coastal California. Journal of Medical Entomology, 44(2), 328-335.

Ectoparasite diversity and exposure to vector-borne disease agents in wild rodents in central coastal California. / Nieto, Nathan C.; Dabritz, Haydee; Foley, Patrick; Drazenovich, Niki; Calder, Lee; Adjemian, Jennifer; Conrad, Patricia A; Foley, Janet E.

In: Journal of Medical Entomology, Vol. 44, No. 2, 03.2007, p. 328-335.

Research output: Contribution to journalArticle

Nieto, NC, Dabritz, H, Foley, P, Drazenovich, N, Calder, L, Adjemian, J, Conrad, PA & Foley, JE 2007, 'Ectoparasite diversity and exposure to vector-borne disease agents in wild rodents in central coastal California', Journal of Medical Entomology, vol. 44, no. 2, pp. 328-335.
Nieto NC, Dabritz H, Foley P, Drazenovich N, Calder L, Adjemian J et al. Ectoparasite diversity and exposure to vector-borne disease agents in wild rodents in central coastal California. Journal of Medical Entomology. 2007 Mar;44(2):328-335.
Nieto, Nathan C. ; Dabritz, Haydee ; Foley, Patrick ; Drazenovich, Niki ; Calder, Lee ; Adjemian, Jennifer ; Conrad, Patricia A ; Foley, Janet E. / Ectoparasite diversity and exposure to vector-borne disease agents in wild rodents in central coastal California. In: Journal of Medical Entomology. 2007 ; Vol. 44, No. 2. pp. 328-335.
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abstract = "A survey of wild rodents was performed in the Morro Bay area of central coastal California to determine serological and polymerase chain reaction (PCR) prevalence of Anaplasma phagocytophilum Dumler, Barbet, Bekker, Dasch, Palmer, Ray, Rikihisa, and Rurangirwa, Borrelia burgdorferi Johnson, Schmidt, Hyde, Steigerwalt, and Brenner, Francisella tularensis McCoy, and Yersinia pestis Yersin; to describe the ectoparasitic fauna on important vector-borne disease hosts; and to determine whether pathogen exposure was associated with infestation by ectoparasites. We trapped 411 rodents from 10 species in 2004 and 2005. Anaplasma phagocytophilum exposure was detected in 11{\%} of all wild rodents tested, with seropositive animals in eight species. Anaplasma phagocytophilum DNA was detected by PCR amplification in Neotoma fuscipes Baird and Reithrodontomys megalotis Baird (0.6{\%} of all rodents). Yersinia spp. exposure was identified in 3.2{\%} of all rodents tested, with highest detected exposure in peridomestic rodents, Mus musculus L. (20{\%}), and Rattus rattus L. (50{\%}). No individuals tested positive for the Y. pestis pla gene by PCR. In total, 338 fleas were identified from each of 10 rodent species examined. The most abundant flea was Malareus telchinus Rothschild. Relative density of flea infestation was highest on Spermophilus beecheyi Richardson and Microtus californicus Peale. Ticks recovered from trapped animals included Ixodes angustus Neumann, Ixodes pacificus Cooley & Kohls, Ixodes spinipalpis Hadwen & Nuttall, and Dermacentor occidentales Marx. Given the moderate climate and diversity of rodents and arthropods in the Morro Bay area, ongoing investigation of this region will be helpful in understanding disease maintenance cycles.",
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