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African Health Sciences
Makerere University Medical School
ISSN: 1680-6905
EISSN: 1680-6905
Vol. 13, No. 2, 2013, pp. 266-269
Bioline Code: hs13038
Full paper language: English
Document type: Research Article
Document available free of charge

African Health Sciences, Vol. 13, No. 2, 2013, pp. 266-269

 en Is there a suburban sleeping sickness in Libreville?
Kohagne, T L; Mavoungou, J F; Fako Hendji, G C; Pamba, R & Mbatchi, B

Abstract

Background: The transmission of sleeping sickness occurs primarily in rural areas, and exposed populations are those living from rural activities such as agriculture, fishing, animal husbandry or hunting. However, urban and suburban foci are more and more reported in T. b. gambiense check for this species in other resources areas. In Libreville town, sleeping sickness cases are regularly diagnosed. In order to investigate about the establishment of a transmission cycle of that disease, we have carried out an entomological survey in two quarters in the vicinity of the town.
Methods: Vavoua traps were set out in all suitable biotopes for tsetse flies during four days and examined twice a day. Flies were collected, identified and dissected.
Results: Two species of Glossina check for this species in other resources were caught: G. palpalis check for this species in other resources palpalis (90.58%) and G. caliginea check for this species in other resources (9.42%). A total infection rate of 9.37% was observed after dissection of all non-teneral flies captured.
Conclusion: These results suggest the establishment of a trypanosomiasis transmission cycle in the area. No salivary gland was found infected. Given that infected persons are regularly detected, we can think about the existence of a suburban sleeping sickness focus in Libreville. More analysis is needed concerning the identification of human trypanosomes and the origin of Glossina blood meals that may confirm the existence of that focus.

Keywords
sleeping sickness; suburban focus; Glossina; Libreville; Gabon

 
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