[Genotyping of Plasmodium vivax in China-myanmar border by circumsporozoite protein].

By using a series of type-specific primers for Plasmodium vivax circumsporozoite protein (CSP) gene and nested PCR, genotyping was conducted for the specimens of Plasmodium vivax isolated from China-Myanmar border. In 174 isolates of P. vivax, four genotypes, namely, tropical zone family strain, temperate zone family strain, genotype-mixed infection and PV-II type, were identified each accounting for 54.6%, 35.6%, 6.9%, and 2.9%, respectively. The tropical zone family strain was dominant in the border area. There was no significant difference on the P.v CSP genotype constitution between Laza isolate of Myanmar and Tengchong isolate of Yunnan, China.