TY - JOUR
T1 - Development and evaluation of a rapid immunochromatographic test for mumps-specific IgM in oral fluid specimens and use as a matrix for preserving viral nucleic acid for RT-PCR
AU - Warrener, Lenesha
AU - Slibinskas, Rimas
AU - Brown, David
AU - Sasnauskas, Kestutis
AU - Samuel, Dhanraj
PY - 2010
Y1 - 2010
N2 - The use of oral fluid specimens for diagnosis of mumps by detection of virus-specific IgM or nucleic acid is now well established. The utility of oral fluids would be improved further if testing could be performed closer to the patient. A near patient test (NPT) for the detection of mumpsspecific IgM in oral fluid specimens was developed and evaluated using 196 oral fluid specimens from suspected cases of mumps and measles. Compared to enzyme immunoassay (EIA), the sensitivity, specificity, positive and negative predictive value of the mumps IgM NPT were 79.5%, 100%, 100%, and 72.6%, respectively. On oral fluid specimens with a test to negative control optical density ratio (T/N) ≥10 in the EIA, sensitivity of the NPT increased to 95.2%. To determine whether viral nucleic acid from oral fluid was preserved on the NPT strips used for IgM detection, reverse transcription-polymerase chain reaction (RT-PCR)was performedon 58 oral fluids before and after testing on NPT strips. In RT-PCR-positive oral fluids, mumps virus was detected in 19/21 (90.5%) specimens extracted from NPT strips. Mumps virus RNA was not detected in 37/37 (100%) NPT strips from mumps RT-PCR-negative oral fluid specimens. Mumps IgM NPT is rapid and simple to perform, with an acceptable level of performance for confirmation of a clinical diagnosis outside of the laboratory. The NPT strip is also a suitable matrix for preserving nucleic acid, enabling virus-specific RT-PCR to be performed.
AB - The use of oral fluid specimens for diagnosis of mumps by detection of virus-specific IgM or nucleic acid is now well established. The utility of oral fluids would be improved further if testing could be performed closer to the patient. A near patient test (NPT) for the detection of mumpsspecific IgM in oral fluid specimens was developed and evaluated using 196 oral fluid specimens from suspected cases of mumps and measles. Compared to enzyme immunoassay (EIA), the sensitivity, specificity, positive and negative predictive value of the mumps IgM NPT were 79.5%, 100%, 100%, and 72.6%, respectively. On oral fluid specimens with a test to negative control optical density ratio (T/N) ≥10 in the EIA, sensitivity of the NPT increased to 95.2%. To determine whether viral nucleic acid from oral fluid was preserved on the NPT strips used for IgM detection, reverse transcription-polymerase chain reaction (RT-PCR)was performedon 58 oral fluids before and after testing on NPT strips. In RT-PCR-positive oral fluids, mumps virus was detected in 19/21 (90.5%) specimens extracted from NPT strips. Mumps virus RNA was not detected in 37/37 (100%) NPT strips from mumps RT-PCR-negative oral fluid specimens. Mumps IgM NPT is rapid and simple to perform, with an acceptable level of performance for confirmation of a clinical diagnosis outside of the laboratory. The NPT strip is also a suitable matrix for preserving nucleic acid, enabling virus-specific RT-PCR to be performed.
KW - Enzyme immunoassay
KW - Near patient test
KW - Point-of-care test
KW - Recombinant nucleoprotein
UR - http://www.scopus.com/inward/record.url?scp=75449084792&partnerID=8YFLogxK
U2 - 10.1002/jmv.21693
DO - 10.1002/jmv.21693
M3 - Article
C2 - 20087926
AN - SCOPUS:75449084792
SN - 0146-6615
VL - 82
SP - 485
EP - 493
JO - Journal of Medical Virology
JF - Journal of Medical Virology
IS - 3
ER -