SACIDS Africa Centre of Excellence for Infectious Diseases, Sokoine University of Agriculture, P.O. Box 3297 Morogoro, Tanzania.
Department of Veterinary Microbiology, Parasitology and Biotechnology, Sokoine University of Agriculture, P.O. Box 3015 Morogoro, Tanzania.
Viruses. 2021 Mar 24;13(4):536. doi: 10.3390/v13040536.
Dengue contributes a significant burden on global public health and economies. In Africa, the burden of dengue virus (DENV) infection is not well described. This review was undertaken to determine the prevalence of dengue and associated risk factors. A literature search was done on PubMed/MEDLINE, Scopus, Embase, and Google Scholar databases to identify articles published between 1960 and 2020. Meta-analysis was performed using a random-effect model at a 95% confidence interval, followed by subgroup meta-analysis to determine the overall prevalence. Between 1960 and 2020, 45 outbreaks were identified, of which 17 and 16 occurred in East and West Africa, respectively. Dengue virus serotype 1 (DENV-1) and DENV-2 were the dominant serotypes contributing to 60% of the epidemics. Of 2211 cases reported between 2009 and 2020; 1954 (88.4%) were reported during outbreaks. Overall, the prevalence of dengue was 29% (95% CI: 20-39%) and 3% (95% CI: 1-5%) during the outbreak and non-outbreak periods, respectively. Old age (6/21 studies), lack of mosquito control (6/21), urban residence (4/21), climate change (3/21), and recent history of travel (3/21) were the leading risk factors. This review reports a high burden of dengue and increased risk of severe disease in Africa. Our findings provide useful information for clinical practice and health policy decisions to implement effective interventions.
登革热对全球公共卫生和经济造成了重大负担。在非洲,登革热病毒(DENV)感染的负担描述得并不完善。本综述旨在确定登革热的流行情况和相关的危险因素。我们在 PubMed/MEDLINE、Scopus、Embase 和 Google Scholar 数据库中进行了文献检索,以确定 1960 年至 2020 年间发表的文章。采用 95%置信区间的随机效应模型进行荟萃分析,然后进行亚组荟萃分析以确定总体流行率。在 1960 年至 2020 年间,共发现 45 起暴发事件,其中东非和西非分别发生了 17 起和 16 起。登革热病毒血清型 1(DENV-1)和 DENV-2 是导致 60%流行的主要血清型。在 2009 年至 2020 年间报告的 2211 例病例中;1954 例(88.4%)发生在暴发期间。总体而言,登革热的流行率为 29%(95%CI:20-39%),暴发和非暴发期间分别为 3%(95%CI:1-5%)。高龄(21 项研究中的 6 项)、缺乏蚊虫控制(21 项研究中的 6 项)、城市居住(21 项研究中的 4 项)、气候变化(21 项研究中的 3 项)和近期旅行史(21 项研究中的 3 项)是主要的危险因素。本综述报告了非洲登革热负担沉重,并且疾病严重程度的风险增加。我们的研究结果为临床实践和卫生政策决策提供了有用的信息,以实施有效的干预措施。