Indian Journal of Medical Research

ORIGINAL ARTICLE
Year
: 2016  |  Volume : 144  |  Issue : 1  |  Page : 128--133

A novel indirect ELISA for diagnosis of dengue fever


Rohan Narayan, Senthil Raja, Senthil Kumar, Mohana Sambasivam, Raja Jagadeesan, Kavita Arunagiri, Kaveri Krishnasamy, Gunasekaran Palani 
 Department of Virology, King Institute of Preventive Medicine & Research, Chennai, India

Correspondence Address:
Kaveri Krishnasamy
Department of Virology, King Institute of Preventive Medicine & Research, Guindy, Chennai 600 032, Tamil Nadu
India

Background & objectives: Dengue fever (DF) is associated with significant morbidity and mortality in the tropical and sub-tropical regions of the world. Since there are no effective antiviral drugs for treatment, clinicians often rely on the accurate diagnosis of dengue fever to begin supportive therapy at early stages of the illness. The objective of this study was to develop an in-house dengue virus serotype 2 (DENV-2) non-structural protein- 5 (NS5) based indirect ELISA. Methods: DENV-2 was raised in Vero cells and the viral proteins were separated and subsequently the NS5 protein was eluted. Serum samples from primary and secondary dengue fever patients; and acute and convalescent samples from Japanese encephalitis (JE) and West Nile virus (WNV) cases were used to validate the ELISA. Results: The assay was found to be 100 per cent specific in detecting DENV-2 specific antibodies from patient«SQ»s serum. However, in terms of sensitivity, the assay could detect IgM antibodies only from 90 per cent of the primary dengue samples. The IgM/IgG ratio of the primary and secondary samples was 7.24 and 0.64, respectively. Interpretation & conclusions: The results indicate that the DENV-2 NS5 ELISA is dengue group specific and can be used to differentiate dengue infection from other circulating Flavivirus infections. This NS5 ELISA can also be used to distinguish between primary and secondary dengue fever on the basis of IgM/IgG ratios. Further studies with larger sample sizes and different DENV serotypes are required to validate the ELISA.


How to cite this article:
Narayan R, Raja S, Kumar S, Sambasivam M, Jagadeesan R, Arunagiri K, Krishnasamy K, Palani G. A novel indirect ELISA for diagnosis of dengue fever.Indian J Med Res 2016;144:128-133


How to cite this URL:
Narayan R, Raja S, Kumar S, Sambasivam M, Jagadeesan R, Arunagiri K, Krishnasamy K, Palani G. A novel indirect ELISA for diagnosis of dengue fever. Indian J Med Res [serial online] 2016 [cited 2020 Oct 20 ];144:128-133
Available from: https://www.ijmr.org.in/article.asp?issn=0971-5916;year=2016;volume=144;issue=1;spage=128;epage=133;aulast=Narayan;type=0