Autor(es): Buerano, Corazon C.; Natividad, Filipinas F.; Contreras, Rodolfo C.; Ibrahim, Ima Nurisa; Mangada, Marlou Noel M.; Hasebe, Futoshi; Inoue, Shingo; Matias, Ronald R.; Igarashi, Akira

Resumo: Antigen detection by sandwich ELISA was evaluated to predict RT-PCR detection of dengue viral genome in infected culture fluid of Aedes albopictus clone C6/36 cells. Serum specimens collected from dengue patients within 5 days from onset of fever in 2 hospitals in Metro Manila, Philippines, were inoculated into C6/36 cells, and incubated at 28 degrees C. A total of 282 infected culture fluid specimens were harvested and examined by sandwich ELISA and RT-PCR to detect dengue viral antigen and genome, respectively. In the sandwich ELISA, the P/N ratio was calculated by dividing optical density (OD) of a given test specimen by the OD of the standard negative specimen. Samples with a P/N ratio >= 4.001 were positive for viral genome detection by RT-PCR. The sensitivity and specificity of antigen sandwich ELISA with RTPCR as the standard, were 90.4% and 100%, respectively. Although antigen sandwich ELISA is less sensitive than RT-PCR, its usefulness lies in its capability to screen a large number of samples at a minimum cost, especially during an outbreak. Samples that meet a set cutoff value can undergo confirmation by RT-PCR for further epidemiological studies.

Imprenta: Southeast Asian Journal of Tropical Medicine and Public Health, v. 39, n. 5, p. 817-821, 2008

Descritores: Aedes aegypti - Genome ; Aedes aegypti - Infectious diseases ; Aedes aegypti - PCR detection ; Aedes aegypti - RT-PCR

Data de publicação: 2008

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