Vtq. Huong et al., GENETIC-STUDY OF JAPANESE ENCEPHALITIS VIRUSES FROM VIETNAM, The American journal of tropical medicine and hygiene, 49(5), 1993, pp. 538-544
Citations number
19
Categorie Soggetti
Public, Environmental & Occupation Heath","Tropical Medicine
Two hundred eighty-five nucleotides from the capsid/premembrane gene r
egion of 16 isolates of Japanese encephalitis (JE) virus from the sout
hern and northern regions of Vietnam obtained during the period 1964-1
988 were sequenced and compared with each other and with wild JE virus
strains from China and Japan. The 16 Vietnamese isolates showed low r
ates of genetic evolution (less-than-or-equal-to 3.2%) and were classi
fied into one genotype with an overall similarity of greater-than-or-e
qual-to 95.4%, including the Japanese JaArOS982 strain taken as refere
nce, and earlier isolated strains from Japan (Nakayama 1935) and China
(Beijing-1 1949 and SA14 1954), the wild-type strains used to derive
JE vaccines. The implications of the close genetic relationship among
Vietnamese strains of JE virus analyzed in our study in relation to th
eir epidemiology and evolution are discussed.