Prevalence of <i>Borrelia burgdorferi</i> in Ixodidae Tick around Asia: A Systematic Review and Meta-Analysis

Lyme disease (LD) is a common arthropod-borne inflammatory disorder prevalent in the northern hemisphere. LD is caused by a spirochete named <i>Borrelia burgdorferi</i> s.l., which is transmitted to humans by ticks. Climate, environment, and other factors affect land use; recreational-be...

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Main Authors: Zhenhua Ji, Miaomiao Jian, Peng Yue, Wenjing Cao, Xin Xu, Yu Zhang, Yingyi Pan, Jiaru Yang, Jingjing Chen, Meixiao Liu, Yuxin Fan, Xuan Su, Shiyuan Wen, Jing Kong, Bingxue Li, Yan Dong, Guozhong Zhou, Aihua Liu, Fukai Bao
Format: Article
Language:English
Published: MDPI AG 2022-01-01
Series:Pathogens
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Online Access:https://www.mdpi.com/2076-0817/11/2/143
Description
Summary:Lyme disease (LD) is a common arthropod-borne inflammatory disorder prevalent in the northern hemisphere. LD is caused by a spirochete named <i>Borrelia burgdorferi</i> s.l., which is transmitted to humans by ticks. Climate, environment, and other factors affect land use; recreational-behavior changes affect human contact with infected ticks. Studies in Europe and North America have looked at these aspects, but studies in Asia have not. We searched databases to identify all relevant abstracts published until March 2021. A meta-analysis was undertaken using the standard methods and procedures established by the Cochrane Collaboration. Ninety-one articles were included in our meta-analysis. The literature search identified data from nine countries (China, Japan, Malaysia, Mongolia, Pakistan, Russia Siberia region, South Korea, Thailand and Turkey). Furthermore, 53,003 ticks from six genera (<i>Amblyomma</i>, <i>Dermacentor</i>, <i>Haemaphysalis</i>, <i>Hyalomma</i>, <i>Ixodes</i> and <i>Rhipicephalus</i>) were inspected for infection with <i>B. burgdorferi.</i> The pooled prevalence was 11.1% (95% CI = 8.3–14.2%). Among the nine countries, China had the most studies (56) and Malaysia had the highest infection rate (46.2%). Most infected ticks were from the genera <i>Ixodes</i> and <i>Haemaphysalis</i>. Ticks of the genus <i>Ixodes</i> had the highest infection rate (16.9%). Obvious heterogeneity was noted in our meta-analysis. We analyzed the heterogeneity with regard to countries, genera, time points, and detection methods. This study suggests that <i>Ixodes</i>, <i>Haemaphysalis</i> and <i>Dermacentor</i> may be the most common tike of <i>B. burgdorferi</i>-positive in Asia. The highest proportion of ticks infected by <i>B. burgdorferi</i> were from the genus <i>Ixodes.</i> This meta-analysis is the first attempt to explain the <i>B. burgdorferi</i> infection of hard-body ticks in Asia. The infection rate for each country and infection rate of different tick genera were analyzed: there were large differences between them. The literature is concentrates mainly on East Asia, and data are limited. Our study can provide a reference for a more comprehensive and in-depth investigation of ticks in Asia infected by <i>B. burgdorferi</i> spirochetes.
ISSN:2076-0817