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Assessment of RNA amplification by multiplex RT-PCR and IgM detection by indirect and capture ELISAs for the diagnosis of measles and rubella

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Sanz JC, Mosquera M, Ramos B, Ramírez R, de Ory F, Echevarria JE. Assessment of RNA amplification by multiplex RT-PCR and IgM detection by indirect and capture ELISAs for the diagnosis of measles and rubella. APMIS 2010; 118: 203–9.

The aim of the study was to compare RNA amplification using multiplex RT-PCR and IgM detection by means of indirect and capture ELISAs for the diagnosis of measles and rubella. A total of 229 cases of maculopapular rash with serum and throat swab samples were included. Specific serological IgM to measles and rubella was determined by Enzygnost® (Siemens) and PlateliaTM (Bio-Rad). Both viruses were researched using multiplex RT-PCR performed on throat samples. Criteria for inclusion of measles or rubella cases were a positive RT-PCR result for one virus and negative for the other; and/or a positive IgM result for one virus by both ELISAs and negative RT-PCR for the other virus. A total of 74 cases were classified as measles and 54 as rubella. In measles, sensitivity and specificity were 93.2% and 100% for RT-PCR, 97.3% and 98.1% for Enzygnost®, and 90.5% and 95.5% for PlateliaTM. For rubella, these values were 42.6% and 100% for RT-PCR, 100% and 97.1% for Enzygnost®, and 94.4% and 98.3% for PlateliaTM. Enzygnost® and PlateliaTM are useful techniques for detecting IgM against measles and rubella. RNA amplification by RT-PCR was both sensitive and specific for the diagnosis of measles; however, for rubella, the sensitivity of this technique must be improved.
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Keywords: ELISA; IgM; Measles; RT-PCR; rubella

Document Type: Research Article

Affiliations: 1: Laboratorio Regional de Salud Pública de la Comunidad de Madrid, Madrid 2: Centro Nacional de Microbiología, Instituto de Salud Carlos III, Madrid 3: Servicio de Epidemiología de la Comunidad de Madrid, Madrid, Spain

Publication date: 01 March 2010

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