Please use this identifier to cite or link to this item: https://doi.org/10.4269/ajtmh.13-0100
Title: Short report: Comparison of the mosquito inoculation technique and quantitative real time polymerase chain reaction to measure dengue virus concentration
Authors: Choy, M.M.
Ellis, B.R.
Ellis, E.M.
Gubler, D.J. 
Issue Date: Nov-2013
Source: Choy, M.M., Ellis, B.R., Ellis, E.M., Gubler, D.J. (2013-11). Short report: Comparison of the mosquito inoculation technique and quantitative real time polymerase chain reaction to measure dengue virus concentration. American Journal of Tropical Medicine and Hygiene 89 (5) : 1001-1005. ScholarBank@NUS Repository. https://doi.org/10.4269/ajtmh.13-0100
Abstract: An accurate measure of infectious dengue virus in human and mosquito tissues is critical to fully understand virus-host relationships, disease severity, viral fitness, and pathogenesis. In recent years, RNA copy number measured by quantitative real time-polymerase chain reaction has been used to measure dengue virus concentration in vitro and in vivo. In this study, we detail important differences in the measurement of viral growth kinetics in Vero and C6/36 tissue cultures, in Aedes aegypti mosquitoes, and in viremic human sera using RNA genomic equivalents and mosquito infectious dose 50 (MID 50). Although there was reasonably good correlation between the two methods, RNA copy number was 2 to 5 logs greater than infectious virus titers. These differences varied significantly depending on virus strain, viral platform, infectious virus assay, and viral growth phase. The results have important implications for the correct interpretation of biological and epidemiological data from experimental and clinical studies, and show that genomic equivalents should be interpreted with caution when used as a proxy for infectious virus in such studies. Copyright © 2013 by The American Society of Tropical Medicine and Hygiene.
Source Title: American Journal of Tropical Medicine and Hygiene
URI: http://scholarbank.nus.edu.sg/handle/10635/110266
ISSN: 00029637
DOI: 10.4269/ajtmh.13-0100
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