Abstract
Background:To analyze the prevalence of latent infection of pathogens of hand, foot, and mouth disease (HFMD) in Chinese healthy population and its influencing factors, so as to provide reference for the prevention and control of HFMD.Methods:A systematic literature searching about the incidence of latent infection of HFMD was conducted in Chinese and English databases. The inclusion and exclusion criteria of the retrieved literature were established. The qualified literatures were screened and the data were extracted. The pooled rate and its 95% confidence interval was used to assess the latent infection rate of HFMD pathogens in healthy Chinese population, and subgroup analysis was conducted based on gender and age. All statistical analyses were performed using the STATA version 12.0 software.Results:A total of 31 literatures were included in this meta-analysis. The recessive infection rate of HFMD pathogens reported in the literature of Chinese healthy people ranged from 4.59% to 44.12%. The results of meta-analysis showed that the latent infection rate of human enteroviruses (HEVs) in healthy Chinese population was 17.5% (14.9–20.1%), among which, the latent infection rates of EV-A71, CV-A16, and other HEVs were 3.3% (2.2–4.4%), 1.7% (1.0–2.5%), and 15.1% (11.1–17.1%), respectively. The latent infection rates of HEVs in healthy men and women in China were 16.7% (12.9–20.4%) and 14.4% (10.8–18.0%), respectively. The latent infection rates of HEVs in the healthy population aged 0 to 5 years and over 5 years were 24.4% (20.4–28.5%) and 9.4% (6.5–12.2%), respectively. Meta regression showed that the factors affecting the latent infection rate of HEVs in Chinese healthy population included sampling period, sampling area, and study population.Conclusion:The latent infection rate of HEVs is high in healthy people in China, but it is mainly caused by other enteroviruses. The latent infection rate of HEVs in male was higher than that of female and was greater in people aged 0 to 5 than that of aged over 5 years. Limited by the quantity and quality of the included studies, more high-quality studies are needed for further verification in the future.
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