Kamala Benjamin, Loll Dana, Msolla Ruth, Dadi David, Gitanya Peter, Mwalimu Charles, Chacky Frank, Kajange Stella, Khamis Mwinyi, Ballard Sarah-Blythe, Serbantez Naomi, Poyer Stephen
PMI Vector Control Project, Johns Hopkins University Center for Communication Programs, Dar es Salaam 14113, Tanzania.
School of Public Health and Social Sciences, Muhimbili University of Health and Allied Sciences, Dar es Salaam 65001, Tanzania.
Trop Med Infect Dis. 2025 Jun 19;10(6):175. doi: 10.3390/tropicalmed10060175.
The private sector in Tanzania has played an essential role in improving coverage and access to mosquito nets. This follow-up study assessed the overall market share for untreated and insecticide-treated nets (ITNs) and misleading or counterfeit ITN products in commercial markets. This study was conducted from March to April 2024 in ten regions in Tanzania. The study used mixed methods: (1) a quantitative survey among sampled outlets supported by photographic documentation of all net products and (2) key informant interviews of retailers and wholesalers. We assessed the relationship between market share and population access using ANOVA and Pearson correlation. No counterfeit or misleading nets were found, consistent with results from 2017, 2021, and 2022 surveys. Untreated nets dominated all markets, comprising 99% of all products observed and 99% of estimated net sales 3 months before the survey. Legitimate ITNs were crowded out from the studied markets. Leaked nets from free distributions were present but extremely limited (1%) and at their lowest level of the survey rounds. Untreated nets were more expensive than leaked ITNs for both regular- and queen-size nets. Despite ongoing efforts, increasing the share of legitimate ITNs remains a significant challenge in a context of large-scale public sector distributions.
坦桑尼亚的私营部门在提高蚊帐覆盖率和可及性方面发挥了重要作用。这项后续研究评估了商业市场中未处理蚊帐和经杀虫剂处理蚊帐（ITN）以及误导性或假冒ITN产品的总体市场份额。该研究于2024年3月至4月在坦桑尼亚的十个地区进行。研究采用了混合方法：（1）对抽样销售点进行定量调查，并辅以所有蚊帐产品的照片记录；（2）对零售商和批发商进行关键信息访谈。我们使用方差分析和皮尔逊相关性评估了市场份额与人口可及性之间的关系。未发现假冒或误导性蚊帐，这与2017年、2021年和2022年的调查结果一致。未处理蚊帐在所有市场中占主导地位，在所观察到的所有产品中占99%，在调查前3个月的估计蚊帐销售额中占99%。合法的经杀虫剂处理蚊帐在研究市场中被挤出。免费分发中泄露的蚊帐存在，但极其有限（1%），且处于调查轮次中的最低水平。对于常规尺寸和加大尺寸的蚊帐，未处理蚊帐比泄露的经杀虫剂处理蚊帐更贵。尽管一直在努力，但在大规模公共部门分发的背景下，提高合法经杀虫剂处理蚊帐的份额仍然是一项重大挑战。
