Spatial repellency of transfluthrin-treated hessian strips against laboratory-reared <it>Anopheles arabiensis </it>mosquitoes in a semi-field tunnel cage
<p>Abstract</p> <p>Background</p> <p>Vapour phase spatial repellents deter mosquitoes from attacking one or more humans in a protected space. Simulation models indicate that high coverage of spatial repellents can enhance the impact of long - lasting insecticide nets (L...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
BMC
2012-03-01
|
| Series: | Parasites & Vectors |
| Subjects: | |
| Online Access: | http://www.parasitesandvectors.com/content/5/1/54 |
| _version_ | 1811249991236190208 |
|---|---|
| author | Ogoma Sheila B Ngonyani Hassan Simfukwe Emmanuel T Mseka Anthony Moore Jason Killeen Gerry F |
| author_facet | Ogoma Sheila B Ngonyani Hassan Simfukwe Emmanuel T Mseka Anthony Moore Jason Killeen Gerry F |
| author_sort | Ogoma Sheila B |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>Vapour phase spatial repellents deter mosquitoes from attacking one or more humans in a protected space. Simulation models indicate that high coverage of spatial repellents can enhance the impact of long - lasting insecticide nets (LLINs) and indoor residual spraying (IRS) where mosquito vectors commonly bite humans outdoors. Here we report a preliminary evaluation of an effective, user-friendly prototype product for delivering spatial repellents to protect against malaria vector mosquitoes.</p> <p>Findings</p> <p>Protective efficacy of a 4.0 × 0.3 m strip of hessian sacking treated with 10 ml of transfluthrin was evaluated in a 60 m × 2 m ×2.5 m netting tunnel with malaria-free insectary-reared <it>Anopheles arabiensis </it>Patton mosquitoes. Personal protection, in terms of proportional reduction of exposure to bites, was measured by comparing human landing catches of volunteers with treated and untreated strips. A freshly treated hessian strip reduced mosquito attack rate on human volunteers by > 99% and consistently conferred > 90% protective efficacy for a period of 6 months. Over the entire study period, only 22 out of 1400 released mosquitoes bit volunteers using the treated sacking strip while 894 out of 1400 mosquitoes released into cages containing volunteers using an untreated strip fed upon them.</p> <p>Conclusion</p> <p>Locally available natural fibers may be promising absorbent substrates for delivering spatial repellents, such as transfluthrin, to protect against mosquitoes in tropical settings. However, these observations relate to a single prototype specimen of this particular device, therefore, much more detailed, well replicated studies are essential to establish long-term efficacy, effectiveness, practicability and affordability.</p> |
| first_indexed | 2024-04-12T15:57:10Z |
| format | Article |
| id | doaj.art-6cb664847b804cef883441de9d1ca0a0 |
| institution | Directory Open Access Journal |
| issn | 1756-3305 |
| language | English |
| last_indexed | 2024-04-12T15:57:10Z |
| publishDate | 2012-03-01 |
| publisher | BMC |
| record_format | Article |
| series | Parasites & Vectors |
| spelling | doaj.art-6cb664847b804cef883441de9d1ca0a02022-12-22T03:26:20ZengBMCParasites & Vectors1756-33052012-03-01515410.1186/1756-3305-5-54Spatial repellency of transfluthrin-treated hessian strips against laboratory-reared <it>Anopheles arabiensis </it>mosquitoes in a semi-field tunnel cageOgoma Sheila BNgonyani HassanSimfukwe Emmanuel TMseka AnthonyMoore JasonKilleen Gerry F<p>Abstract</p> <p>Background</p> <p>Vapour phase spatial repellents deter mosquitoes from attacking one or more humans in a protected space. Simulation models indicate that high coverage of spatial repellents can enhance the impact of long - lasting insecticide nets (LLINs) and indoor residual spraying (IRS) where mosquito vectors commonly bite humans outdoors. Here we report a preliminary evaluation of an effective, user-friendly prototype product for delivering spatial repellents to protect against malaria vector mosquitoes.</p> <p>Findings</p> <p>Protective efficacy of a 4.0 × 0.3 m strip of hessian sacking treated with 10 ml of transfluthrin was evaluated in a 60 m × 2 m ×2.5 m netting tunnel with malaria-free insectary-reared <it>Anopheles arabiensis </it>Patton mosquitoes. Personal protection, in terms of proportional reduction of exposure to bites, was measured by comparing human landing catches of volunteers with treated and untreated strips. A freshly treated hessian strip reduced mosquito attack rate on human volunteers by > 99% and consistently conferred > 90% protective efficacy for a period of 6 months. Over the entire study period, only 22 out of 1400 released mosquitoes bit volunteers using the treated sacking strip while 894 out of 1400 mosquitoes released into cages containing volunteers using an untreated strip fed upon them.</p> <p>Conclusion</p> <p>Locally available natural fibers may be promising absorbent substrates for delivering spatial repellents, such as transfluthrin, to protect against mosquitoes in tropical settings. However, these observations relate to a single prototype specimen of this particular device, therefore, much more detailed, well replicated studies are essential to establish long-term efficacy, effectiveness, practicability and affordability.</p>http://www.parasitesandvectors.com/content/5/1/54Outdoor mosquito controlSpatial repellencyHessian strips |
| spellingShingle | Ogoma Sheila B Ngonyani Hassan Simfukwe Emmanuel T Mseka Anthony Moore Jason Killeen Gerry F Spatial repellency of transfluthrin-treated hessian strips against laboratory-reared <it>Anopheles arabiensis </it>mosquitoes in a semi-field tunnel cage Parasites & Vectors Outdoor mosquito control Spatial repellency Hessian strips |
| title | Spatial repellency of transfluthrin-treated hessian strips against laboratory-reared <it>Anopheles arabiensis </it>mosquitoes in a semi-field tunnel cage |
| title_full | Spatial repellency of transfluthrin-treated hessian strips against laboratory-reared <it>Anopheles arabiensis </it>mosquitoes in a semi-field tunnel cage |
| title_fullStr | Spatial repellency of transfluthrin-treated hessian strips against laboratory-reared <it>Anopheles arabiensis </it>mosquitoes in a semi-field tunnel cage |
| title_full_unstemmed | Spatial repellency of transfluthrin-treated hessian strips against laboratory-reared <it>Anopheles arabiensis </it>mosquitoes in a semi-field tunnel cage |
| title_short | Spatial repellency of transfluthrin-treated hessian strips against laboratory-reared <it>Anopheles arabiensis </it>mosquitoes in a semi-field tunnel cage |
| title_sort | spatial repellency of transfluthrin treated hessian strips against laboratory reared it anopheles arabiensis it mosquitoes in a semi field tunnel cage |
| topic | Outdoor mosquito control Spatial repellency Hessian strips |
| url | http://www.parasitesandvectors.com/content/5/1/54 |
| work_keys_str_mv | AT ogomasheilab spatialrepellencyoftransfluthrintreatedhessianstripsagainstlaboratoryreareditanophelesarabiensisitmosquitoesinasemifieldtunnelcage AT ngonyanihassan spatialrepellencyoftransfluthrintreatedhessianstripsagainstlaboratoryreareditanophelesarabiensisitmosquitoesinasemifieldtunnelcage AT simfukweemmanuelt spatialrepellencyoftransfluthrintreatedhessianstripsagainstlaboratoryreareditanophelesarabiensisitmosquitoesinasemifieldtunnelcage AT msekaanthony spatialrepellencyoftransfluthrintreatedhessianstripsagainstlaboratoryreareditanophelesarabiensisitmosquitoesinasemifieldtunnelcage AT moorejason spatialrepellencyoftransfluthrintreatedhessianstripsagainstlaboratoryreareditanophelesarabiensisitmosquitoesinasemifieldtunnelcage AT killeengerryf spatialrepellencyoftransfluthrintreatedhessianstripsagainstlaboratoryreareditanophelesarabiensisitmosquitoesinasemifieldtunnelcage |