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  • Title: Detection of Japanese encephalitis virus in samples of JE patients by RT-PCR.
    Author: Sun J, Tso S, Chen B.
    Journal: Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi; 2000 Jun; 14(2):184-7. PubMed ID: 11503059.
    Abstract:
    OBJECTIVE: To set up and assess the feasibility of RT-PCR method for Japanese encephalitis virus (JEV) detection, and use this method to detect clinical specimens. METHODS: The sensitivity of this RT-PCR was measured by plaque formation test, and the specificity of primers was proved by detecting some other flaviviruses. This RT-PCR was also compared with PRHI. RESULTS: JEV RNA could be detected successfully from viral culturing supernatants and from mouse brain infected by JEV. Its sensitivity of detecting JEV RNA from viral culturing supernatants was 64 PFU. A total of 38 specimens (of which 25 were serum specimens, 13 CSF specimens) from 16 clinically susceptible JE patients were examined by RT-PCR and RPHI Summing up the detection results of RT-PCR and RPHI, 14 patients among the 16 susceptible patients were affirmed as Japanese encephalitis patients. This RT-PCR is specific to JEV. The sensitivity of joint use of RT-PCR and RPHI to detect JEV was 100%, higher than using RPHI alone, and was 7.7% higher than using RT-PCR only. RT-PCR is more suitable for epidemiological survey than virus isolation. CONCLUSIONS: This RT-PCR for JEV detection is highly specific and sensitive. Toxemia period of JE patient is very short, so grasping the time of blood specimen collection will affect virus detection rate.
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