Search results for: Horse IgM ELISA Kit
#24745728 2014/04/18 To Up
Evaluation of the performance of a rapid enzyme-linked immunosorbent assay in the detection of Anaplasma phagocytophilum antibodies in horses.
The aim of this study was to evaluate the performance of a commercially available rapid enzyme-linked immonosorbent assay, the Snap® 4Dx test, in the detection of Anaplasma phagocytophilum antibodies in horses. Two hundred apparently healthy horses (asymptomatic) and 244 animals showing clinical symptoms (symptomatic), were tested for A. phagocytophilum immunoglobulin G (IgG) antibodies using both the Snap® 4Dx kit and an indirect fluorescence antibody test (IFAT), with the latter serving as a comparative test. Horses belonging to the symptomatic group were also tested for evidence of active infection with A. phagocytophilum by analysis of IFAT IgM titers and PCR assay amplifying a specific fragment of the 16S rRNA gene. The overall agreement between the results obtained using the two tests, as well as the relative performance exhibited by the Snap® 4Dx test in the two groups, was assessed. Forty of the 45 animals (89%) testing positive for IgG antibodies using IFAT were correctly identified using Snap® 4Dx testing. The agreement between the results of the two tests was very high (k>0.9), with almost identical performances in both symptomatic and asymptomatic animals. Conversely, within the symptomatic group, only 44% (no. 11/25) of Snap® 4Dx positives appeared to be associated with a state of active infection, whereas the remaining 56% (no. 14/25) were related both to not infected animals (no. 1) and to horses whose status of infection needed further evaluations to be confirmed (no. 13/25). This study suggests that the Snap® 4Dx test could represent a valid screening method for use during epidemiological surveys of equine populations. Nevertheless, in-clinic application of the test does not appear to be merited.Fabrizia Veronesi, Fabrizio Passamonti, Annabella Moretti, Giulia Morganti, Doron Moshe Vardi, Fulvio Laus, Maria Luisa Marenzoni, Andrea Spaterna, Mauro Coletti, Daniela Piergili Fioretti
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