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  • Title: TaqMan real-time RT-PCR assay for detecting Japanese encephalitis virus in swine blood samples and mosquitoes.
    Author: Pantawane PB, Dhanze H, Ravi Kumar GVPPS, M R G, Dudhe NC, Bhilegaonkar KN.
    Journal: Anim Biotechnol; 2019 Jul; 30(3):267-272. PubMed ID: 29938578.
    Abstract:
    Japanese encephalitis (JE) is an emerging mosquito-borne zoonotic flaviviral disease. The present study was undertaken with the objective to develop TaqMan real-time reverse-transcription polymerase chain reaction (RT-PCR) assay for rapid detection and quantification of Japanese encephalitis virus (JEV) in swine blood and mosquito vectors. The amplification of envelope (E) gene was targeted by designing gene-specific MGB TaqMan fluorescent probe along with the primers. The best performance in terms of sensitivity was achieved by standardized TaqMan real-time RT-PCR with a detection limit of 2.8 copies/reaction and it was found to be 4-log more sensitive than conventional RT-PCR. The applicability of the standardized TaqMan assay was evaluated by screening representative sets of field swine blood samples and mosquito pools for JEV. The viral load ranged between 3.32 × 107-4.2 × 102 copies/ml of swine blood samples, and 5.7 × 109-1.3 × 102 copies/pool of mosquitoes. The standardized assay which is highly sensitive, specific and rapid would aid in screening sentinel swine and mosquitoes under JEV surveillance programs for effective prevention and control of disease in human beings.
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