Dear Editor,Adenoviruses are non-enveloped,double-stranded DNA viruses belonging to the Adenoviridae family.To date,100unique genotypes of adenoviruses have been identified,from species A to G,could cause respiratory ...Dear Editor,Adenoviruses are non-enveloped,double-stranded DNA viruses belonging to the Adenoviridae family.To date,100unique genotypes of adenoviruses have been identified,from species A to G,could cause respiratory tract,gastrointestinal tract and ocular infections in human (Akello et al.2020).展开更多
Influenza A(H3N2)virus has a faster evolution rate than other types of influenza viruses.In this study,whole genome sequencing was performed to better understand themolecular evolution of influenzaH3N2 and the protect...Influenza A(H3N2)virus has a faster evolution rate than other types of influenza viruses.In this study,whole genome sequencing was performed to better understand themolecular evolution of influenzaH3N2 and the protective effect of influenza virus vaccine in Qinghai Province,China,in 2017.Complete sequences of eight gene segments of two seasonal influenza H3N2 isolates were sequenced and analyzed using DNASTAR and MEGA 6.06 software.Additionally,the three-dimensional structure of the HA protein was predicted using the SWISS-MODEL server.Phylogenetic and amino acid sequence analysis revealed that two Qinghai H3N2 isolates were typical low-pathogenic influenza viruses,and were relatively closely related to the 2016–2017 vaccine strain,3C.2a-A/Hong Kong/4801/2014.The presence of several antigenic site substitutions(T131K,G/R142K,K160T and R261Q in the HA protein)were specific for the two Qinghai H3N2 virus strains.In addition,amino acid substitution of K160T at the glycosylation site of HA and H75P in PB1-F2 in Qinghai isolatesmight affect the antibody binding ability and virulence of the influenza virus.The presence of several antigenic site mutations in the Qinghai H3N2 isolates confirmed the evolution of circulating H3N2 strains.展开更多
基金supported by Doctor Research Startup Foundation of Changzhi Medical College (BS201912, BS201921)Key Project of Qinghai Health and Family Planning Commission (2017-wjzd-08)Qinghai Thousand People Plan。
文摘Dear Editor,Adenoviruses are non-enveloped,double-stranded DNA viruses belonging to the Adenoviridae family.To date,100unique genotypes of adenoviruses have been identified,from species A to G,could cause respiratory tract,gastrointestinal tract and ocular infections in human (Akello et al.2020).
基金supported by Doctor research startup foundation of Changzhi Medical College(BS201912,BS201921)Key Project of Qinghai Health and Family Planning Commission(2017-wjzd-08)and Qinghai Thousand People Plan.
文摘Influenza A(H3N2)virus has a faster evolution rate than other types of influenza viruses.In this study,whole genome sequencing was performed to better understand themolecular evolution of influenzaH3N2 and the protective effect of influenza virus vaccine in Qinghai Province,China,in 2017.Complete sequences of eight gene segments of two seasonal influenza H3N2 isolates were sequenced and analyzed using DNASTAR and MEGA 6.06 software.Additionally,the three-dimensional structure of the HA protein was predicted using the SWISS-MODEL server.Phylogenetic and amino acid sequence analysis revealed that two Qinghai H3N2 isolates were typical low-pathogenic influenza viruses,and were relatively closely related to the 2016–2017 vaccine strain,3C.2a-A/Hong Kong/4801/2014.The presence of several antigenic site substitutions(T131K,G/R142K,K160T and R261Q in the HA protein)were specific for the two Qinghai H3N2 virus strains.In addition,amino acid substitution of K160T at the glycosylation site of HA and H75P in PB1-F2 in Qinghai isolatesmight affect the antibody binding ability and virulence of the influenza virus.The presence of several antigenic site mutations in the Qinghai H3N2 isolates confirmed the evolution of circulating H3N2 strains.
