Evaluation of improved coloured targets to control riverine tsetse in East Africa: A Bayesian approach

Santer, Roger D, Okal, Michael N, Esterhuizen, Johan and Torr, Steve ORCID: https://orcid.org/0000-0001-9550-4030 (2021) 'Evaluation of improved coloured targets to control riverine tsetse in East Africa: A Bayesian approach'. PLoS Neglected Tropical Diseases, Vol 15, Issue 6, e0009463.

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Abstract

Background
Riverine tsetse (Glossina spp.) transmit Trypanosoma brucei gambiense which causes Gambian Human African Trypanosomiasis. Tiny Targets were developed for cost-effective riverine tsetse control, and comprise panels of insecticide-treated blue polyester fabric and black net that attract and kill tsetse. Versus typical blue polyesters, two putatively more attractive fabrics have been developed: Vestergaard ZeroFly blue, and violet. Violet was most attractive to savannah tsetse using large targets, but neither fabric has been tested for riverine tsetse using Tiny Targets.
Methods
We measured numbers of G. f. fuscipes attracted to electrified Tiny Targets in Kenya and Uganda. We compared violets, Vestergaard blues, and a typical blue polyester, using three replicated Latin squares experiments. We then employed Bayesian statistical analyses to generate expected catches for future target deployments incorporating uncertainty in model parameters, and prior knowledge from previous experiments.
Results
Expected catches for average future replicates of violet and Vestergaard blue targets were highly likely to exceed those for typical blue. Accounting for catch variability between replicates, it remained moderately probable (70–86% and 59–84%, respectively) that a given replicate of these targets would have a higher expected catch than typical blue on the same day at the same site. Meanwhile, expected catches for average violet replicates were, in general, moderately likely to exceed those for Vestergaard blue. However, the difference in medians was small, and accounting for catch variability, the probability that the expected catch for a violet replicate would exceed a Vestergaard blue equivalent was marginal (46– 71%).

Item Type:	Article
Subjects:	QX Parasitology > QX 4 General works QX Parasitology > Insects. Other Parasites > QX 505 Diptera QX Parasitology > Protozoa > QX 70 Mastigophora. (e.g., Giardia. Trichomonas. Trypanosoma. Leishmania) WA Public Health > Preventive Medicine > WA 240 Disinfection. Disinfestation. Pesticides (including diseases caused by) WA Public Health > Health Problems of Special Population Groups > WA 395 Health in developing countries
Faculty: Department:	Biological Sciences > Vector Biology Department
Digital Object Identifer (DOI):	https://doi.org/10.1371/journal.pntd.0009463
Depositing User:	Mel Finley
Date Deposited:	27 Jul 2021 14:26
Last Modified:	27 Jul 2021 14:26
URI:	https://archive.lstmed.ac.uk/id/eprint/18494

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