Genotype and epidemiological characteristics of human metapneumovirus among hospitalized cases of acute respiratory infection in children in Changchun City, Jilin Province from 2019 to 2023
10.3760/cma.j.cn112150-20240208-00120
- VernacularTitle:2019—2023年吉林省长春市儿童急性呼吸道感染住院病例中人偏肺病毒的基因型别和流行特征分析
- Author:
Zhibo XIE
1
;
Aili CUI
;
Liwei SUN
;
Yage WANG
;
Yao ZHANG
;
Liwu WANG
;
Baicheng XIA
;
Xin SUN
;
Yan ZHANG
Author Information
1. 传染病溯源预警与智能决策全国重点实验室 国家卫生健康委医学病毒和病毒病重点实验室 中国疾病预防控制中心病毒病预防控制所，北京 102206
- Keywords:
Respiratory tract infections;
Children;
Human metapneumovirus;
Epidemiological characteristics
- From:
Chinese Journal of Preventive Medicine
2024;58(6):862-868
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the genotype and epidemiological characteristics of human metapneumovirus (HMPV) among hospitalized cases with acute respiratory infections (ARI) in children in Changchun City, Jilin Province, China.Methods:From June 2019 to June 2023, throat swabs of ARI inpatients in Changchun Children′s Hospital were collected, and their epidemiological and clinical information were also collected. Quantitative reverse transcription-PCR was used to identify HMPV-positive cases, followed by the amplification of the G gene and genetic analysis in the HMPV-positive cases.Results:A total of 3 311 children hospitalized with ARI were included in this study. Their age ranged from 0 to 17 years old, and the M ( Q1, Q3) of age was 2 (1, 3) years. About 1 811 (54.70%) cases were males. A total of 167 HMPV-positive cases were detected with a positive rate of 5.04%, of which 92.81% (155/167) were children under 5 years old. The positive rate of HMPV in 2019 was 6.37% (30/471), which dropped to the lowest in 2020 (2.31%, 10/432). The HMPV-positive rate was then rebounded in 2021 (4.70%, 60/1 277) and 2022 (4.56%, 21/461), which increased to 6.87% (46/670) in 2023. The difference in HMPV-positive rate among each year was statistically significant ( P<0.05). The prevalence peak of HMPV varied in different years, showing either a unimodal or bimodal distribution in one year. A total of 79 HMPV G gene sequences were obtained, of which subtype A and subtype B accounted for 48.10% and 51.90%, respectively. All of the subtype A sequences were clarified as A2c duplicated variants, and subtype B was mainly B2 genotype. Besides, subtypes A and B were prevalent alone or co-circulated in different years, and there was a subtype replacement pattern in HMPV. Conclusion:The positive rate of HMPV in hospitalized ARI cases in children is significantly different from 2019 to 2023 in Changchun City. Notably, there are certain switch patterns of HMPV subtypes A and B in different years.
