Zembere, Kennedy, Chirombo, James, Nasoni, Peter, McDermott, Daniel, Divala, Lizzie, Hawkes, Frances ORCID: 0000-0002-0964-3702 and Jones, Christopher M. (2022) The human-baited host decoy trap (HDT) is an efficient sampling device for exophagic malaria mosquitoes within irrigated lands in southern Malawi. Scientific reports, 12:3428. ISSN 2045-2322 (Online) (doi:https://doi.org/10.1038/s41598-022-07422-x)

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Abstract

Irrigation schemes provide an ideal habitat for Anopheles mosquitoes particularly during the dry season. Reliable estimates of outdoor host-seeking behaviour are needed to assess the impact of vector control options and this is particularly the case for Anopheles arabiensis which displays a wide range of behaviours that circumvent traditional indoor-insecticide based control. In this study we compared the Host Decoy Trap (HDT) with the Human Landing Catch (HLC) and Suna trap in a repeated Latin square design in two villages on an irrigated sugar estate in southern Malawi. Over the course of 18 trapping nights we caught 379 female Anopheles, the majority of which were identified as An. arabiensis. Overall, the HDT and HLC caught a similar number of Anopheles per night with both methods catching significantly higher densities than the Suna trap across both villages. Regardless of the density of Anopheles mosquitoes in each village the HLC and HDT demonstrated broadly similar sampling efficacy. We conclude that the HDT is an effective sampling device for outdoor host seeking An. arabiensis in southern Malawi. The presence of An. arabiensis in irrigated lands during the dry season poses a challenge for ongoing indoor vector control efforts.

Item Type:	Article
Uncontrolled Keywords:	anopheles, mosquito trap, malaria vectors, host decoy trap, sugarcane
Subjects:	G Geography. Anthropology. Recreation > GF Human ecology. Anthropogeography Q Science > QR Microbiology > QR355 Virology R Medicine > RA Public aspects of medicine > RA0421 Public health. Hygiene. Preventive Medicine
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > Natural Resources Institute Faculty of Engineering & Science > Natural Resources Institute > Agriculture, Health & Environment Department
Related URLs:	http://www.biorxiv.org/content/10.1101/2...
Last Modified:	09 Mar 2022 10:08
URI:	http://gala.gre.ac.uk/id/eprint/35169

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