Sheep skin odor improves trap captures of mosquito vectors of Rift Valley fever

Show simple item record Tchouassi, David Poumo Sang, Rosemary Sole, Catherine L. Bastos, Armanda D.S. Mithoefer, Klaus Torto, Baldwyn 2013-02-08T06:56:27Z 2013-02-08T06:56:27Z 2012-11-01
dc.description.abstract In recent years, the East African region has seen an increase in arboviral diseases transmitted by blood-feeding arthropods. Effective surveillance to monitor and reduce incidence of these infections requires the use of appropriate vector sampling tools. Here, trapped skin volatiles on fur from sheep, a known preferred host of mosquito vectors of Rift Valley fever virus (RVFV), were used with a standard CDC light trap to improve catches of mosquito vectors. We tested the standard CDC light trap alone (L), and baited with (a) CO2 (LC), (b) animal volatiles (LF), and (c) CO2 plus animal volatiles (LCF) in two highly endemic areas for RVF in Kenya (Marigat and Ijara districts) from March–June and September–December 2010. The incidence rate ratios (IRR) that mosquito species chose traps baited with treatments (LCF, LC and LF) instead of the control (L) were estimated. Marigat was dominated by secondary vectors and host-seeking mosquitoes were 3–4 times more likely to enter LC and LCF traps [IRR = 3.1 and IRR = 3.8 respectively] than the L only trap. The LCF trap captured a greater number of mosquitoes than the LC trap (IRR = 1.23) although the difference was not significant. Analogous results were observed at Ijara, where species were dominated by key primary and primary RVFV vectors, with 1.6-, 6.5-, and 8.5-fold increases in trap captures recorded in LF, LC and LCF baited traps respectively, relative to the control. These catches all differed significantly from those trapped in L only. Further, there was a significant increase in trap captures in LCF compared to LC (IRR = 1.63). Mosquito species composition and trap counts differed between the RVF sites. However, within each site, catches differed in abundance only and no species preferences were noted in the different baited-traps. Identifying the attractive components present in these natural odors should lead to development of an effective odor-bait trapping system for population densitymonitoring and result in improved RVF surveillance especially during the inter-epidemic period. en
dc.description.librarian am2013 en
dc.description.librarian ab2013
dc.description.sponsorship The authors acknowledge the German Academic Exchange Service (DAAD) for a studentship to DPT. This research was funded by, the philanthropic arm of Google. en
dc.description.uri en
dc.identifier.citation Tchouassi DP, Sang R, Sole CL, Bastos ADS, Mithoefer K, et al. (2012) Sheep Skin Odor Improves Trap Captures of Mosquito Vectors of Rift Valley Fever. PLoS Negl Trop Dis 6(11): e1879. DOI: 10.1371/journal.pntd.0001879 en
dc.identifier.issn 1935-2727
dc.identifier.other 10.1371/journal.pntd.0001879
dc.language.iso en en
dc.publisher Public Library of Science en
dc.rights © 2012 Tchouassi et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License en
dc.subject RVFV en
dc.subject Mosquito vectors en
dc.subject.lcsh Rift Valley fever en
dc.subject.lcsh Sheep en
dc.subject.lcsh Mosquitoes as carriers of disease en
dc.title Sheep skin odor improves trap captures of mosquito vectors of Rift Valley fever en
dc.type Article en

Files in this item

This item appears in the following Collection(s)

Show simple item record