Antigen sandwich ELISA predicts RT-PCR detection of dengue virus genome in infected culture fluids of Aedes albopictus C6/36 cells.
Southeast Asian J Trop Med Public Health
;
2008 Sep; 39(5): 817-21
Article
in English
| IMSEAR
| ID: sea-33932
ABSTRACT
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 > or = 4.001 were positive for viral genome detection by RT-PCR. The sensitivity and specificity of antigen sandwich ELISA with RT-PCR 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.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Humans
/
Enzyme-Linked Immunosorbent Assay
/
Sensitivity and Specificity
/
Genome, Viral
/
Aedes
/
Reverse Transcriptase Polymerase Chain Reaction
/
Dengue Virus
/
Animals
/
Antigens, Viral
Type of study:
Diagnostic study
/
Prognostic study
Language:
English
Journal:
Southeast Asian J Trop Med Public Health
Year:
2008
Type:
Article
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