Two simple immunoassays using endemic leptospiral antigens for serodiagnosis of human leptospirosis.
Southeast Asian J Trop Med Public Health
;
2005 Mar; 36(2): 302-11
Artículo
en Inglés
| IMSEAR
| ID: sea-31213
ABSTRACT
Two simple enzyme immunoassays, a conventional microplate and dot-ELISA, were developed to detect specific IgM antibodies using pool sonicated antigen prepared from three of the most reactive serovars of Leptospira associated with disease in Thailand. Both assays were evaluated and compared with the standard microscopic agglutination test (MAT) performed with 343 serum samples. A battery of 16 pathogenic serovars of L. interrogans were used as antigens in the MAT assay. The result of MAT at serum titers > or = 1400 showed three pathogenic serovars of leptospira, Bratislava (71.88%), Sejroe (63.54%) and Pyrogenes (36.46%), were among the most commonly reacted serovars and they were selected for preparation of pool sonicated antigen for both IgM ELISA tests. The microplate IgM-ELISA, performed with sera at 180 dilution using the cutoff OD of 0.60, demonstrated sensitivity, specificity and efficiency of 87.50, 97.57, and 94.75%, respectively. The same values for IgM dot-ELISA performed with sera at 1160 dilution were 98.96, 93.93, and 95.33%, respectively. Both ELISA methods showed results with statistically significant differences from MAT (p < 0.05). The agreement rate of IgM dot-ELISA compared with microplate IgM-ELISA was 0.85 by Kappa analysis. Both assays offered relatively high negative predictive values (95.26-99.57%), thus making the assays ideally suited for rapid screening. Future applications of the IgM dot-ELISA as a test kit would be suitable for use at the peripheral level as a rapid screening test for human leptospirosis.
Texto completo:
Disponible
Índice:
IMSEAR (Asia Sudoriental)
Asunto principal:
Tailandia
/
Femenino
/
Humanos
/
Masculino
/
Inmunoglobulina M
/
Pruebas de Aglutinación
/
Ensayo de Inmunoadsorción Enzimática
/
Pruebas Serológicas
/
Niño
/
Técnicas para Inmunoenzimas
Tipo de estudio:
Estudio diagnóstico
País/Región como asunto:
Asia
Idioma:
Inglés
Revista:
Southeast Asian J Trop Med Public Health
Año:
2005
Tipo del documento:
Artículo
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