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Environmental mutations in the Campo focus challenge elimination of sleeping sickness transmission in Cameroon

Melachio Tanekou, Tito Tresor, Bouaka Tsakeng, Calmes Ursain, Tirados, Inaki ORCID:, Torr, Steve ORCID:, Njiokou, Flobert, Acho, Alphonse and Wondji, Charles ORCID: (2022) 'Environmental mutations in the Campo focus challenge elimination of sleeping sickness transmission in Cameroon'. Medical and Veterinary Entomology, Vol 36, Issue 3, pp. 260-268.

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Sleeping sickness is still prevalent in Campo, southern Cameroon, despite the efforts of World Health Organization and the National Control Programme in screening and treating cases. Reducing disease incidence still further may need the control of tsetse vectors. We update entomological and parasitological parameters necessary to guide tsetse control in Campo. Tsetse flies were trapped, their apparent densities were evaluated as the number of flies captured per trap per day and mapped using GIS tools. Polymerase chain reaction based methods were used to identify their trypanosome infection rates. Glossina palpalis palpalis was the dominant vector species representing 93.42% and 92.85% of flies captured respectively during the heavy and light dry seasons. This species presented high densities, that is, 3.87, 95% CI [3.84–3.91], and 2.51, 95% CI [2.49–2.53] flies/trap/day in the two seasons. Moreover, 16.79% (of 1054) and 20.23% (of 1132 flies) were found infected with at least 1 trypanosome species for the 2 seasons respectively, Trypanosoma congolense being the most prevalent species, and Trypanosoma. brucei gambiense identified in 4 samples. Tsetse flies are abundant in Campo and present high trypanosome infection rates. The detection of tsetse infected with human trypanosomes near the newly created palm grove show workers' exposition. Tsetse densities maps built will guide vector control with ‘Tiny Targets’.

Item Type: Article
Additional Information: This article also appears in: Special Issue: Sustainable Vector Biology Research Systems in Africa
Subjects: QX Parasitology > QX 20 Research (General)
QX Parasitology > Insects. Other Parasites > QX 505 Diptera
QX Parasitology > Insects. Other Parasites > QX 650 Insect vectors
WC Communicable Diseases > Tropical and Parasitic Diseases > WC 705 Trypanosomiasis
Faculty: Department: Biological Sciences > Vector Biology Department
Digital Object Identifer (DOI):
SWORD Depositor: JISC Pubrouter
Depositing User: JISC Pubrouter
Date Deposited: 08 Sep 2022 13:25
Last Modified: 14 Jun 2023 10:19


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