Variation in bluetongue virus real-time reverse transcription polymerase chain reaction assay results in blood samples of sheep, cattle, and alpaca

Barbara P. Brito, Ian Gardner, Sharon K. Hietala, Beate Crossley

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Bluetongue is a vector-borne viral disease that affects domestic and wild ruminants. The epidemiology of this disease has recently changed, with occurrence in new geographic areas. Various real-time quantitative reverse transcription polymerase chain reaction (real-time qRT-PCR) assays are used to detect Bluetongue virus (BTV); however, the impact of biologic differences between New World camelids and domestic ruminant samples on PCR efficiency, for which the BTV real-time qRT-PCR was initially validated are unknown. New world camelids are known to have important biologic differences in whole blood composition, including hemoglobin concentration, which can alter PCR performance. In the present study, sheep, cattle, and alpaca blood were spiked with BTV serotypes 10, 11, 13, and 17 and analyzed in 10-fold dilutions by real-time qRT-PCR to determine if species affected nucleic acid recovery and assay performance. A separate experiment was performed using spiked alpaca blood subsequently diluted in 10-fold series in sheep blood to assess the influence of alpaca blood on performance efficiency of the BTV real-time qRT-PCR assay. Results showed that BTV-specific nucleic acid detection from alpaca blood was consistently 1-2 logs lower than from sheep and cattle blood, and results were similar for each of the 4 BTV serotypes analyzed.

Original languageEnglish (US)
Pages (from-to)753-756
Number of pages4
JournalJournal of Veterinary Diagnostic Investigation
Volume23
Issue number4
DOIs
StatePublished - Jul 2011

Keywords

  • Bluetongue
  • extraction
  • polymerase chain reaction inhibitors
  • real-time quantitative reverse transcription polymerase chain reaction
  • test validation

ASJC Scopus subject areas

  • veterinary(all)

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