TY - JOUR
T1 - Accuracy of a commercial IgM ELISA for the diagnosis of human leptospirosis in Thailand
AU - Desakorn, Varunee
AU - Wuthiekanun, Vanaporn
AU - Thanachartwet, Vipa
AU - Sahassananda, Duangjai
AU - Chierakul, Wirongrong
AU - Apiwattanaporn, Apichat
AU - Day, Nicholas P.
AU - Limmathurotsakul, Direk
AU - Peacock, Sharon J.
PY - 2012/3
Y1 - 2012/3
N2 - The Leptospira immunoglobulin M enzyme-linked immunosorbent assay (IgM ELISA) has been recommended for the rapid diagnosis of leptospirosis in endemic areas. We conducted a retrospective case-control study of 218 patients (109 leptospirosis cases confirmed by Leptospira culture and/or microscopic agglutination test and 109 control patients with acute febrile illness) to evaluate the diagnostic accuracy of a commercial IgM ELISA (Panbio) in northeast Thailand. Paired serum samples taken on admission and at least 10 days after the onset of symptoms were tested. Using the cutoff value recommended by the manufacturer (11 Panbio units), sensitivity and specificity of IgM ELISA on paired sera were 90.8% and 55.1%. A receiver operating characteristic curve was used to determine the optimal cutoff value. This was 20 Panbio units, which gave a sensitivity and specificity of 76.1% and 82.6%, respectively, on paired sera. We conclude that using either cutoff value, the accuracy of IgM ELISA is limited in our setting.
AB - The Leptospira immunoglobulin M enzyme-linked immunosorbent assay (IgM ELISA) has been recommended for the rapid diagnosis of leptospirosis in endemic areas. We conducted a retrospective case-control study of 218 patients (109 leptospirosis cases confirmed by Leptospira culture and/or microscopic agglutination test and 109 control patients with acute febrile illness) to evaluate the diagnostic accuracy of a commercial IgM ELISA (Panbio) in northeast Thailand. Paired serum samples taken on admission and at least 10 days after the onset of symptoms were tested. Using the cutoff value recommended by the manufacturer (11 Panbio units), sensitivity and specificity of IgM ELISA on paired sera were 90.8% and 55.1%. A receiver operating characteristic curve was used to determine the optimal cutoff value. This was 20 Panbio units, which gave a sensitivity and specificity of 76.1% and 82.6%, respectively, on paired sera. We conclude that using either cutoff value, the accuracy of IgM ELISA is limited in our setting.
UR - http://www.scopus.com/inward/record.url?scp=84859571938&partnerID=8YFLogxK
U2 - 10.4269/ajtmh.2012.11-0423
DO - 10.4269/ajtmh.2012.11-0423
M3 - Article
C2 - 22403329
AN - SCOPUS:84859571938
SN - 0002-9637
VL - 86
SP - 524
EP - 527
JO - American Journal of Tropical Medicine and Hygiene
JF - American Journal of Tropical Medicine and Hygiene
IS - 3
ER -
