Isolation and identification of Japanese encephalitis virus in Liaoning Province
Wang, J-wen.; Fu, S-hong.; Wang, H-yu.; Mao, X-yan.; Liu, W-bin.; He, Y.; Sun, X-hong.; Cai, Z-lin.; Wu, L-ping.; Zhao, X-fang.; Han, R-hong.; Jing, Y.; Liang, G-dong.
Zhonghua Shi Yan He Lin Chuang Bing du Xue Za Zhi 20(1): 61-65
2006
ISSN/ISBN: 1003-9279 PMID: 16642222 Document Number: 604697
A study was conducted to investigate arboviruses carried by mosquitoes in Liaoning Province, China. 4927 mosquitoes were collected from Liaoning Province in July 2002. Virus strains were isolated by inoculation into BHK-21, C6/36 and Vero cells. The newly isolated strains were identified by serological (ELISA and IFA) and molecular methods (real-time polymerase chain reaction (PCR)). Two strains were isolated from mosquitoes causing cytopathogenic effect on cells and were fatal to suckling mice. Serological tests showed that both strains were positive for Japanese encephalitis virus (JEV) antibody. The PrM and E genes were cloned and sequenced. The phylogenetic analysis showed that the new isolates belonged to genotype I, JEV. Sequence analysis showed that the homology of nucleotide sequences and amino acid (AA) sequences between the 2 strains was 100%. Compared with the nucleotide sequences between the 2 strains and the standard JEV vaccine strain SA14-14-2, the difference was up to 4.11%, and the difference of AA was 0.6%.