Bayesian estimation of Tritrichomonas foetus diagnostic test sensitivity and specificity in range beef bulls

Andrés Perez, Eduardo Cobo, Alfredo Martínez, Carlos Campero, Ernesto Späth

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Accuracy of culture for diagnosis of Tritrichomonas foetus was investigated in 2832 naturally exposed range beef bulls from 124 herds. Preputial fluid samples were inoculated into the culture medium, incubated at 37 °C, and daily examined. Diagnostic test was evaluated using Bayesian techniques to estimate sensitivity and specificity without a gold standard. Median posterior test sensitivity was 72.04% (95% probability interval: 58.07-86.38%) and specificity was 95.37% (95% probability interval: 94.07-96.65%). Low diagnostic test accuracy may have resulted from host and/or diagnostic test procedure related factors. Under natural range conditions, more accurate methods for T. foetus diagnostic and repeated preputial samplings of bulls may be necessary on trichomonosis control programs.

Original languageEnglish (US)
Pages (from-to)159-162
Number of pages4
JournalVeterinary Parasitology
Volume142
Issue number1-2
DOIs
StatePublished - Nov 30 2006
Externally publishedYes

Keywords

  • Bayesian
  • Culture
  • Diagnostic tests
  • Tritrichomonas foetus

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