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Factors affecting the propensity of tsetse flies to enter houses and attack humans inside : increased risk of sleeping sickness in warmer climates

dc.contributor.authorVale, Glyn A.en_ZA
dc.contributor.authorHargrove, John W.en_ZA
dc.contributor.authorChamisa, Andrewen_ZA
dc.contributor.authorHall, David R.en_ZA
dc.contributor.authorMangwiro, Clementen_ZA
dc.contributor.authorTorr, Stephen J.en_ZA
dc.date.accessioned2016-03-30T10:00:59Z
dc.date.available2016-03-30T10:00:59Z
dc.date.issued2013-04
dc.identifier.citationVale, G.A. et al. 2013. Factors affecting the propensity of tsetse flies to enter houses and attack humans inside: increased risk of sleeping sickness in warmer climates. PLos Neglected Tropical Diseases, 7(4):e2193, doi:10.1371/journal.pntd.0002193.en_ZA
dc.identifier.issn1935-2735 (online)
dc.identifier.otherdoi:10.1371/journal.pntd.0002193
dc.identifier.urihttp://hdl.handle.net/10019.1/98891
dc.descriptionCITATION: Vale, G.A. et al. 2013. Factors affecting the propensity of tsetse flies to enter houses and attack humans inside: increased risk of sleeping sickness in warmer climates. PLos Neglected Tropical Diseases, 7(4):e2193, doi:10.1371/journal.pntd.0002193.en_ZA
dc.descriptionThe original publication is available at http://journals.plos.org/plosntds
dc.description.abstractBackground: Sleeping sickness, or human African trypanosomiasis, is caused by two species of Trypanosoma brucei that are transmitted to humans by tsetse flies (Glossina spp.) when these insects take a bloodmeal. It is commonly assumed that humans must enter the normal woodland habitat of the flies to become infected, but recent studies found that tsetse frequently attack humans inside buildings. Factors affecting human/tsetse contact in buildings need identification. Methodology/Principal Findings: In Zimbabwe, tsetse were allowed access to a house via an open door. Those in the house at sunset, and those alighting on humans in the house during the day, were caught using hand-nets. Total catches were unaffected by: (i) the presence of humans in the house and at the door, (ii) wood smoke from a fire inside the house or just outside, (iii) open windows, and (iv) chemicals simulating the odor of cattle or of humans. Catches increased about 10-fold with rising ambient temperatures, and during the hottest months the proportion of the total catch that was taken from the humans increased from 5% to 13%. Of the tsetse caught from humans, 62% consisted of female G. morsitans morstans and both sexes of G. pallidipes, i.e., the group of tsetse that normally alight little on humans. Some of the tsetse caught were old enough to be effective vectors. Conclusion/Significance: Present results confirm previous suggestions that buildings provide a distinctive and important venue for transmission of sleeping sickness, especially since the normal repellence of humans and smoke seems poorly effective in such places. The importance of the venue would be increased in warmer climates.en_ZA
dc.description.urihttp://journals.plos.org/plosntds/article?id=10.1371/journal.pntd.0002193
dc.format.extent7 pages : illustrations
dc.language.isoen_ZAen_ZA
dc.publisherPLoSen_ZA
dc.subjectTsetse-flies -- Zimbabween_ZA
dc.subjectTsetse flies -- Habitat -- Zimbabween_ZA
dc.titleFactors affecting the propensity of tsetse flies to enter houses and attack humans inside : increased risk of sleeping sickness in warmer climatesen_ZA
dc.typeArticleen_ZA
dc.description.versionPublisher's versionen_ZA
dc.rights.holderAuthors retain copyrighten_ZA


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