Entomological Surveillance Planning Tool (ESPT)-generated actionable evidence on human and vector behaviours optimizes present interventions and reduces exposure to Anopheles vectors in two communities of Guna Yala, Panamá

Malaria Journal

Research

Daragh Gibson¹  Nicolas Presley¹  Mariela Mosquera Renteria¹  Eileen Jeffrey Gutiérrez²  Élodie A. Vajda²  Allison Tatarsky²  Neil F. Lobo³  Daniel O’Reilly⁴  Mario I. Ávila⁴ 

[1] Clinton Health Access Initiative (CHAI), Panama City, Panama;Malaria Elimination Initiative (MEI), University of California, San Francisco (UCSF), San Francisco, USA;Malaria Elimination Initiative (MEI), University of California, San Francisco (UCSF), San Francisco, USA;Eck Institute for Global Health, University of Notre Dame (UND), Notre Dame, IN, USA;Ministerio de Salud de Panamá (MINSA), Panama City, Panama;

关键词: Bionomics;    Exophagic;    Human behavior;    Gap in protection;    Malaria;    Ny. albimanus;   

DOI  :  10.1186/s12936-023-04453-1

 received in 2022-10-05, accepted in 2023-01-10,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundAlthough most of Panamá is free from malaria, localized foci of transmission persist, including in the Guna Yala region. Government-led entomological surveillance using an Entomological Surveillance Planning Tool (ESPT) sought to answer programmatically relevant questions on local entomological drivers of transmission and gaps in protection to guide local vector control decision-making.MethodsThe ESPT was used to design a sampling plan to answer priority programmatic questions about the appropriateness of Long Lasting Insecticidal Nets (LLINs) and spaces and times where humans remain exposed to Anopheles bites (gaps in protection) in the communities of Permé and Puerto Obaldía, Guna Yala. Adult Anopheles were sampled at three time points via human landing catches (HLCs) during the rainy and dry seasons (2018/2019). Human behaviour observations (HBOs) were conducted alongside HLCs to examine intervention use, indoor versus outdoor activity, and sleeping patterns. HLC and HBO data were integrated to evaluate HBO-adjusted human biting rate (HBR).ResultsA total of 7,431 adult Anopheles were collected across both sites. Of the 450 specimens molecularly confirmed to species-level, 75.5% (n = 340) were confirmed as Anopheles Nyssorhynchus albimanus, followed by Anopheles (Ny.) aquasalis. Anopheles host seeking activity was demonstrated to be primarily exophagic throughout all sampling periods and in both communities. When adjusted with HBOs, exposure to mosquito bites was predominantly indoors and overnight in Permé (Nov, Mar), compared to predominantly outdoors in Puerto Obaldía (Nov, Mar, Jul). Differences in site-specific human-vector exposure profiles were due to contrasting cultural and lifestyle practices between Permé and Puerto Obaldía (possibly partly influenced by the absence of electricity in Permé), and lower LLIN use in Permé. This evidence supported a previously planned LLIN campaign alongside a social behaviour change communication (SBCC) strategy in the Guna Yala Comarca (Jul 2019), which increased LLIN use. In turn, this led to a reduction of indoor exposure to mosquito bites, and a shift to predominant outdoor exposure to mosquito bites.ConclusionESPT-based question-driven planning and the integration of HBOs, intervention, and HLC data generated evidence towards answering the programmatic questions. This evidence enabled the characterization of site-specific human-vector exposure profiles, and the quantification of remaining gaps in protection. These data also provide important insights into remaining gaps in protection that must be addressed to further reduce human exposure to mosquito bites at these sites.

【 授权许可】

CC BY   
© The Author(s) 2023

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