Genetic characteristics of VP1 region of enterovirus Coxsackievirus A16 in Xining city from 2017 to 2018 / 中华实验和临床病毒学杂志

ABSTRACT

Objective@#To investigate the genetic characteristics of VP1 coding region of enterovirus Coxsackievirus A16(CV-A16) and etiological features of hand, foot and mouth disease (HFMD) in 2017 in Xining city.@*Methods@#The pharyngeal swab specimens were collected from HFMD patients, and detected by real-time reverse transcription-polymerase chain reaction (RT-PCR). For CV-A16 positive samples, virus isolation was performed. Then RNA was extracted, and then VP1 coding region was amplified by RT-PCR. The phylogenetic tree was constructed by comparing with other genotypes and sub-genotypes strains of EV-A71.@*Results@#It was shown that 70 strains of CV-A16 were isolated from 2017 to 2018 in Xining city. In 2017, 10 strains were isolated and divided into two different lineages by phylogenetic analysis, 3 strains of B1a and 7 stains of B1b. In 2018, 60 stains were isolated, which were all belong to B1b.@*Conclusions@#B1a and B1b of CV-A16 are prevalent in Xining city from 2017 to 2018, in which B1b is the prominent isolates.