Epidemiological characteristics of influenza A infection among the inbound population at Shenzhen ports, 2016-2019
TAN Xiao-yan1,2, GU Da-yong2, HE Jian-an2, ZHU Tian-chuan1,2, LI Lang2, SONG Li2, LONG Jun1
1. Department of Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China; 2. International Travel Health Care Center of ShenZhen, Inspection and Quarantine Academy of Shenzhen, Shenzhen 518010, China
Abstract：To analyze the epidemiological characteristics of influenza A infections among inbound passengers at Shenzhen ports in the past 4 years, and to provide a scientific basis for the monitoring and prevention of influenza A outbreaks, we collected nasopharyngeal swabs from passengers with fever at Shenzhen ports between January 2016 and December 2019. The influenza virus were detected and typed with the real-time RT-PCR method, and the prevalence of different types of influenza-positive cases of was analyzed in Excel and SPSS 20.0. A total of 104 115 nasopharyngeal swab samples were collected, and 14 026 cases of influenza A virus were detected, at a detection rate of 13.5%, with a male to female ratio of 1.75:1. The detection rate of influenza A virus was highest in people 51-60 years and over 60 years of age, at rates of 18.5% and 18.9%, respectively. The detection rate of the H3 subtype was higher than that of the H1N1 subtype in all age groups. There were three peaks of influenza A in 2016 to 2018. The first was mainly H1N1, from February to April of 2016. The second was mainly the H3 subtype, which surged in July 2017 and became the main epidemic strain. The third was also mainly H1N1, from January 2019. From 2016 to 2018, both H1N1 subtypes and H3 subtypes were present among people infected with influenza A at Shenzhen ports, and alternating epidemic characteristics were observed. Influenza was primarily detected in people over 51 years of age, and the detection rates of influenza virus subtypes differed by sex and age.
谭小艳, 顾大勇, 何建安, 朱天川, 李浪, 宋荔, 龙军. 2016-2019年深圳口岸入境人群感染甲型流感的流行病学特征分析[J]. 中国人兽共患病学报, 2020, 36(11): 922-927.
TAN Xiao-yan, GU Da-yong, HE Jian-an, ZHU Tian-chuan, LI Lang, SONG Li, LONG Jun. Epidemiological characteristics of influenza A infection among the inbound population at Shenzhen ports, 2016-2019. Chinese Journal of Zoonoses, 2020, 36(11): 922-927.
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2020, Vol. 36 
