Molecular and Epidemiological Analysis of Respiratory Syncytial Virus Detected in Tokyo, Japan in 2021 Season.
Jpn J Infect Dis
; 76(1): 87-90, 2023 Jan 24.
Article
em En
| MEDLINE
| ID: mdl-36184395
ABSTRACT
During the COVID-19 pandemic in 2021, Japan experienced an outbreak of respiratory syncytial virus (RSV) infection. A total of 51 RSV cases were detected in infant specimens, including 38 rhinorrhea and 13 nasopharyngeal swabs, collected at the Tokyo Metropolitan Institute of Public Health. Of the 51 cases, 12 were RSV-A and 39 were RSV-B. The G protein gene sequence of RSV-A belonged to the ON1 genotype, whereas RSV-B belonged to the BA9 genotype; thus, different types of RSV were detected during the same period, suggesting that the unusual 2021 RSV season was not due to a single strain or genotype. Of all RSV-positive cases, the proportion of patients aged ≥2 years was 56.8% in 2021, higher than the 31.2% reported in the past 5 years. This indicates that infants aged <1 year who were originally susceptible to RSV infection were less likely to be infected with RSV because of the COVID-19 control measures. The 2021 epidemic peaked in the 28th week, 9 weeks earlier than the average from 2016 to 2020. Therefore, it seems necessary to accumulate and analyze further data, such as factors that led to the outbreak and the characteristics of the detected viruses in 2021.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Vírus Sincicial Respiratório Humano
/
Infecções por Vírus Respiratório Sincicial
/
COVID-19
Limite:
Humans
/
Infant
País/Região como assunto:
Asia
Idioma:
En
Revista:
Jpn J Infect Dis
Assunto da revista:
DOENCAS TRANSMISSIVEIS
Ano de publicação:
2023
Tipo de documento:
Article
País de afiliação:
Japão