The genotype distribution and phylodynamic of measles viruses circulating in the east of China in postvaccine era, 2005-2017.
J Med Virol
; 93(8): 5141-5145, 2021 08.
Article
em En
| MEDLINE
| ID: mdl-33527448
ABSTRACT
The increase of the evolutionary pressure will cause phylodynamics changes of viruses. In post-vaccine coverage era, measles viruses face more immune pressure than ever before. Vice versa, the phylodynamic changes may reflect herd immunity level provided by vaccination. In this study, we analyzed phylodynamic characteristics of measles viruses isolated from 2005 to 2017 in Jiangsu province of China using nucleoprotein gene sequences of measles viruses. The phylogenetic tree was constructed with Markov chain Monte Carlo algorithm. The mean gene distance within each group was computed with MEGA7.0 software. Our results showed that a decline trend is observed in the gene distance of nucleoprotein gene with time as well as incidence of measles from epidemic surveillance system. Two clusters of H1a genotype show cocirculation of multiple variants in early years and the disappearance of most variants with time. We explore the phylodynamic of measles virus under high immune pressure. Our findings highlight that phylodynamic of measles viruses is a helpful tool to assess the effectiveness of epidemic control.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Vacina contra Sarampo
/
Sarampo
/
Vírus do Sarampo
País/Região como assunto:
Asia
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
China