Malaria prevalence before and 2 years after implementation of seasonal malaria chemoprevention in Saraya, Senegal

Seasonal malaria chemoprevention (SMC) is adopted and implemented in Senegal since 2013 in the southern regions in children aged between 3 and 120 months. Scaling up of this strategy requires its evaluation to assess its impact. This study was carried out to determine the dynamics of Plasmodium falciparum carriage before and after two years of SMC implementation. Four household surveys were conducted in villages in the health district of Saraya, which is a SMC implementation area in Senegal. These villages were selected using probability proportional to size sampling. Each of the selected villages was divided into segments containing at least 50 children. In each selected segment, a household questionnaire was administered to the parents or legal representatives of children aged 3 to 120 months. Blood smears were collected to determine Plasmodium falciparum prevalence by microscopy one month before the first round of SMC and one month after the last round of the first SMC campaign and t...季节性疟疾化学预防（Seasonal Malaria Chemoprevention, SMC）自2013年起在塞内加尔南部地区面向3至120月龄儿童推行并实施。扩大该干预策略的应用规模需对其干预效果开展评估。本研究旨在探明实施两年季节性疟疾化学预防前后，恶性疟原虫（Plasmodium falciparum）携带状态的动态变化。 本研究在塞内加尔实施季节性疟疾化学预防的萨雷亚卫生辖区内的村庄中开展了四项家庭入户调查。研究采用按规模比例抽样法选取目标村庄，将每个选中的村庄划分为至少包含50名儿童的片区。在每个选中的片区中，向3至120月龄儿童的父母或法定监护人发放家庭问卷并完成访谈。分别于首轮季节性疟疾化学预防实施前1个月、首轮季节性疟疾化学预防活动最后一轮结束后1个月及……采集血涂片，通过显微镜镜检确定恶性疟原虫感染率。