Diversity of rickettsial pathogens in Columbian black-tailed deer and their associated keds (Diptera: Hippoboscidae) and ticks (Acari: Ixodidae)

Janet E Foley, Jeomhee M. Hasty, Robert S. Lane

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Cervids host multiple species of ixodid ticks, other ectoparasites, and a variety of rickettsiae. However, diagnostic test cross-reactivity has precluded understanding the specific role of deer in rickettsial ecology. In our survey of 128 Columbian black-tailed deer (Odocoileus hemionus columbianus (Richardson)) and their arthropod parasites from two northern Californian herds, combined with reports from the literature, we identified four distinct Anaplasma spp. and one Ehrlichia species. Two keds, Lipoptena depressa (Say) and Neolipoptena ferrisi Bequaert, and two ixodid ticks, Ixodes pacificus Cooley and Kohls and Dermacentor occidentalis Marx, were removed from deer. One D. occidentalis was PCR-positive for E. chaffeensis; because it was also PCR-positive for Anaplasma sp., this is an Anaplasma/Ehrlichia co-infection prevalence of 4.3%. 29% of L. depressa, 23% of D. occidentalis, and 14% of deer were PCR-positive for Anaplasma spp. DNA sequencing confirmed A. bovis and A. ovis infections in D. occidentalis, A. odocoilei in deer and keds, and Anaplasma phagocytophilum strain WI-1 in keds and deer. This is the first report of Anaplasma spp. in a North America deer ked, and begs the question whether L. depressa may be a competent vector of Anaplasma spp. or merely acquire such bacteria while feeding on rickettsemic deer.

Original languageEnglish (US)
Pages (from-to)41-47
Number of pages7
JournalJournal of Vector Ecology
Volume41
Issue number1
DOIs
StatePublished - Jun 1 2016

Fingerprint

Hippobosca
Hippoboscidae
Anaplasma
Odocoileus hemionus
tick
Dermacentor occidentalis
Ixodidae
deer
ticks
Acari
pathogen
pathogens
Ehrlichia
Anaplasma bovis
Lipoptena
Anaplasma ovis
Ixodes pacificus
Odocoileus
Anaplasma phagocytophilum
testcrosses

Keywords

  • Anaplasma phagocytophilum
  • Human granulocytic anaplasmosis
  • Odocoileus hemionus
  • Rickettsiales
  • Tick-borne disease

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology

Cite this

Diversity of rickettsial pathogens in Columbian black-tailed deer and their associated keds (Diptera : Hippoboscidae) and ticks (Acari: Ixodidae). / Foley, Janet E; Hasty, Jeomhee M.; Lane, Robert S.

In: Journal of Vector Ecology, Vol. 41, No. 1, 01.06.2016, p. 41-47.

Research output: Contribution to journalArticle

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abstract = "Cervids host multiple species of ixodid ticks, other ectoparasites, and a variety of rickettsiae. However, diagnostic test cross-reactivity has precluded understanding the specific role of deer in rickettsial ecology. In our survey of 128 Columbian black-tailed deer (Odocoileus hemionus columbianus (Richardson)) and their arthropod parasites from two northern Californian herds, combined with reports from the literature, we identified four distinct Anaplasma spp. and one Ehrlichia species. Two keds, Lipoptena depressa (Say) and Neolipoptena ferrisi Bequaert, and two ixodid ticks, Ixodes pacificus Cooley and Kohls and Dermacentor occidentalis Marx, were removed from deer. One D. occidentalis was PCR-positive for E. chaffeensis; because it was also PCR-positive for Anaplasma sp., this is an Anaplasma/Ehrlichia co-infection prevalence of 4.3{\%}. 29{\%} of L. depressa, 23{\%} of D. occidentalis, and 14{\%} of deer were PCR-positive for Anaplasma spp. DNA sequencing confirmed A. bovis and A. ovis infections in D. occidentalis, A. odocoilei in deer and keds, and Anaplasma phagocytophilum strain WI-1 in keds and deer. This is the first report of Anaplasma spp. in a North America deer ked, and begs the question whether L. depressa may be a competent vector of Anaplasma spp. or merely acquire such bacteria while feeding on rickettsemic deer.",
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