Detection of Neorickettsia risticii from various freshwater snail species collected from a district irrigation canal in Nevada County, California

Nicola Pusterla, Daniel Hagerty, Samantha Mapes, Josh VanGeem, Lindsey T. Groves, Mario Dinucci, Langdon C. Fielding, Jill C. Higgins

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

This study investigated the role of a district irrigation canal in Nevada County, California, USA, as the point source of infection for Neorickettsia risticii, causative agent of equine neorickettsiosis (EN). A total of 568 freshwater snails comprising Juga spp., Planorbella subcrenata (Carpenter, 1857) (Rough Rams-horn), Physella virgata (Gould, 1855) (Protean Physa) and feces from three horses with EN were collected and tested for N. risticii by real-time PCR. A total of four freshwater snails tested PCR positive for N. risticii. Phylogenetic analysis showed 99.8-100% homology between the different snail and horse N. risticii isolates. This study represents the first report of infection with N. risticii in Planorbella subcrenata and suggests that the irrigation canal was the aquatic environment responsible for the spread of N. risticii.

Original languageEnglish (US)
Pages (from-to)489-491
Number of pages3
JournalVeterinary Journal
Volume197
Issue number2
DOIs
StatePublished - Aug 2013

Keywords

  • Equine neorickettsiosis
  • Freshwater snails
  • Horse
  • Irrigation canal
  • Neorickettsia risticii
  • Potomac horse fever

ASJC Scopus subject areas

  • Animal Science and Zoology
  • veterinary(all)

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