Performance of Five Serological Assays for Diagnosis of Rhodococcus equi Pneumonia in Foals
AUTOR(ES)
Giguère, Steeve
FONTE
American Society for Microbiology
RESUMO
The performance of four enzyme-linked immunosorbent assays (ELISAs) (ELISA-6939, ELISA-33701, ELISA-VapA, and ELISA-California) and an agar gel immunodiffusion test for diagnosis of Rhodococcus equi pneumonia in foals was evaluated. Antibody concentrations of foals with culture-confirmed R. equi pneumonia (n = 41) were compared to those of age-matched pasturemates that remained clinically healthy during the entire breeding season (n = 24). For each serological assay evaluated, selection of a low cutoff resulted in high sensitivity but low specificity. Increasing the cutoff value resulted in better specificity but to the detriment of sensitivity. The best diagnostic performance was achieved with ELISA-California at a cutoff of 40%, resulting in a sensitivity of 59% and a specificity of 88%. We conclude that current serological assays do not differentiate between diseased and clinically healthy foals.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=150531Documentos Relacionados
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