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Coverage-dependent effect of insecticide-treated curtains for dengue control in Thailand

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Abstract
Evidence on the effectiveness of insecticide-treated curtains (ITCs) for reducing densities of Aedes mosquitoes, the principal vectors of dengue, is scarce. In Laem Chabang southeast of Bangkok, Thailand, the Breteau Index (BI) (number of positive containers/100 houses) was 45 in October 2006. In March 2007, we distributed long-lasting ITCs in 22 clusters (2,032 houses) and selected 66 control clusters (661 houses). Routine control activities continued in all clusters. Six months after distribution, the BI was 25.8 and 77.6 in intervention and control areas, respectively (P < 0.001). Eighteen months after distribution, the BI was 21.8 and 23.8, respectively (P = 0.28). The average number of ITCs/house at cluster level was associated with the BI (P < 0.01) after six months, when 70.5% of households still used ITCs, but not at 18 months, when ITC coverage had decreased to 33.2%. Deployment of ITCs can result in considerable reductions in Aedes infestation levels, but the effect is coverage dependent.
Keywords
TRANSMISSION, LETHAL OVITRAP, ALBOPICTUS, CULICIDAE, EFFICACY, VILLAGES, AEDES-AEGYPTI DIPTERA, WATER CONTAINER COVERS, RANDOMIZED CONTROLLED-TRIAL, VECTOR CONTROL INTERVENTIONS

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Chicago
Vanlerberghe, Veerle, Yuwadee Trongtokit, Sochai Jirarojwatana, Ravisara Jirarojwatana, Audrey Lenhart, Chamnam Apiwathnasorn, Philip J McCall, and Patrick Van Der Stuyft. 2013. “Coverage-dependent Effect of Insecticide-treated Curtains for Dengue Control in Thailand.” American Journal of Tropical Medicine and Hygiene 89 (1): 93–98.
APA
Vanlerberghe, Veerle, Trongtokit, Y., Jirarojwatana, S., Jirarojwatana, R., Lenhart, A., Apiwathnasorn, C., McCall, P. J., et al. (2013). Coverage-dependent effect of insecticide-treated curtains for dengue control in Thailand. AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE, 89(1), 93–98.
Vancouver
1.
Vanlerberghe V, Trongtokit Y, Jirarojwatana S, Jirarojwatana R, Lenhart A, Apiwathnasorn C, et al. Coverage-dependent effect of insecticide-treated curtains for dengue control in Thailand. AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE. 2013;89(1):93–8.
MLA
Vanlerberghe, Veerle, Yuwadee Trongtokit, Sochai Jirarojwatana, et al. “Coverage-dependent Effect of Insecticide-treated Curtains for Dengue Control in Thailand.” AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE 89.1 (2013): 93–98. Print.
@article{4306259,
  abstract     = {Evidence on the effectiveness of insecticide-treated curtains (ITCs) for reducing densities of Aedes mosquitoes, the principal vectors of dengue, is scarce. In Laem Chabang southeast of Bangkok, Thailand, the Breteau Index (BI) (number of positive containers/100 houses) was 45 in October 2006. In March 2007, we distributed long-lasting ITCs in 22 clusters (2,032 houses) and selected 66 control clusters (661 houses). Routine control activities continued in all clusters. Six months after distribution, the BI was 25.8 and 77.6 in intervention and control areas, respectively (P < 0.001). Eighteen months after distribution, the BI was 21.8 and 23.8, respectively (P = 0.28). The average number of ITCs/house at cluster level was associated with the BI (P < 0.01) after six months, when 70.5% of households still used ITCs, but not at 18 months, when ITC coverage had decreased to 33.2%. Deployment of ITCs can result in considerable reductions in Aedes infestation levels, but the effect is coverage dependent.},
  author       = {Vanlerberghe, Veerle and Trongtokit, Yuwadee and Jirarojwatana, Sochai and Jirarojwatana, Ravisara and Lenhart, Audrey and Apiwathnasorn, Chamnam and McCall, Philip J and Van Der Stuyft, Patrick},
  issn         = {0002-9637},
  journal      = {AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE},
  keywords     = {TRANSMISSION,LETHAL OVITRAP,ALBOPICTUS,CULICIDAE,EFFICACY,VILLAGES,AEDES-AEGYPTI DIPTERA,WATER CONTAINER COVERS,RANDOMIZED CONTROLLED-TRIAL,VECTOR CONTROL INTERVENTIONS},
  language     = {eng},
  number       = {1},
  pages        = {93--98},
  title        = {Coverage-dependent effect of insecticide-treated curtains for dengue control in Thailand},
  url          = {http://dx.doi.org/10.4269/ajtmh.13-0015},
  volume       = {89},
  year         = {2013},
}

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