West Nile virus infection in two alpacas.

TitleWest Nile virus infection in two alpacas.
Publication TypeJournal Article
Year of Publication2004
AuthorsKutzler MA, Bildfell RJ, Gardner-Graff KK, Baker RJ, Delay JP, Mattson DE
JournalJournal of the American Veterinary Medical Association
Volume225
Issue6
Pagination921-4, 880
Date Published2004 Sep 15
ISSN0003-1488
KeywordsAnimals, Antibodies, Viral, Camelids, New World, Diagnosis, Differential, Fatal Outcome, Female, Male, Reverse Transcriptase Polymerase Chain Reaction, Tick Infestations, Ticks, West Nile Fever, West Nile virus
Abstract

A male alpaca acutely developed signs of anorexia and fever. Within 2 days, neurologic signs (head tremors and asymmetric ataxia) developed. West Nile virus (WNV) infection was considered a primary differential diagnosis on the basis of 6 previous cases on nearby alpaca farms on which animals had similar clinical signs. Four days after the male alpaca became ill, a female alpaca from the same farm developed similar neurologic signs. In addition to anti-inflammatory and supportive treatments, both alpacas received a transfusion of llama plasma with antibodies against WNV Seven days after the onset of clinical signs, the female alpaca had made a full recovery; however, the more severely affected male died. West Nile virus infection was confirmed post mortem by use of reverse transcriptase-polymerase chain reaction assay and immunohistochemical staining.

Alternate JournalJ. Am. Vet. Med. Assoc.