In 2007, nonsuppurative encephalitis was identified in a killer whale at a marine park in Texas, United States. Panviral DNA microarray of brain tissue suggested West Nile virus (WNV); WNV was confirmed by reverse transcription PCR and sequencing. Immunohistochemistry demonstrated WNV antigen within neurons. WNV should be considered in cases of encephalitis in cetaceans.

Original languageEnglish
Pages (from-to)23-25
Number of pages3
JournalJournal of Wildlife Rehabilitation
Issue number3
StatePublished - Dec 1 2011


  • Cetaceans
  • Killer whale
  • Orcinus orca
  • West Nile virus


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