Description and epidemiology of Theileria youngi n. sp. from a northern Californian dusky-footed woodrat (Neotoma fuscipes) population

A. M. Kjemtrup, T. Robinson, Patricia A Conrad

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

An epidemiologic study designed to identify the small mammal reservoir for the zoonotic WA1-type babesial parasite resulted in the discovery of a small, intraerythrocytic piroplasm in smeared blood from dusky-footed woodrats (Neotoma fuscipes) in northern California. The woodrat parasites were isolated and compared to other piroplasm parasites based on their morphology, antigenicity, and genetic characteristics. These studies indicated that the woodrat parasites were not the WA1-type babesial agent but were of the genus Theileria. We accordingly named it Theileria youngi. The prevalence in the woodrat population was high (61%). Infection was unrelated to gender or age of the woodrats. Potential vectors for this tick-transmitted parasite included 3 species of ticks recovered from the woodrats, Dermacentor occidentalis, Ixodes woodi, and Ixodes pacificus. Mostly larval or nymphal stages were recovered, suggesting transtadial transmission is possible. This is the first piroplasm fully characterized from a dusky-footed woodrat.

Original languageEnglish (US)
Pages (from-to)373-378
Number of pages6
JournalJournal of Parasitology
Volume87
Issue number2
StatePublished - 2001

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Parasitology
  • Microbiology

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