Navigation Links
Repellents between dusk and bedtime make insecticide-treated bednets more effective
Date:11/12/2007

Using insect repellent in addition to insecticide treated bednets (ITNs) has been shown to provide greater protection against malaria in areas where mosquitoes feed in the early evening.

The findings of a study carried out by the team based at the London School of Hygiene & Tropical Medicine and working in collaboration with the National Bureau of Malaria Control at the Ministry of Health in La Paz, Bolivia, are published today in the British Medical Journal.

36% of the population of the Americas live in areas with a risk of malaria. This includes 293 million people in 21 endemic countries. Of the 1.14 million cases of malaria reported in the Americas during 2000, 87% were recorded in the Amazonian subregion of South America.

The primary malaria vector in the Amazon in anopheles Darlingi. Its peak biting activity is between 8 and 10pm, and more than 80% of feeding occurs before most local people to go bed, where they can be protected by an insecticide treated bednet. Tourists visiting the area are already advised to use repellents as well as bed nets. The researchers sought to determine whether this advice was justified, and whether the combination of repellents and ITNs is indeed more effective in reducing malaria than using ITNs alone.

4008 individuals, based in 860 households in rural villages and peri-urban districts in the Bolivian Amazon, were divided into two groups; all participants already slept under ITNs, but one group also used a plant-based insect repellent, and the second a placebo.

The result was an 80% reduction in episodes of p.vivax (the malaria parasite) in the group that used both ITNs and repellent.

Nigel Hill, a Medical Entomologist at the London School of Hygiene & Tropical Medicine, and lead author of the study, comments: Prior to this study, it was already known that ITNs are a highly effective way of reducing morbidity and mortality from malaria in Africa, where local vectors bite indoors, late at night. Insect repellents were also known to reduce bites, but the extent to which they were able to protect against insect-borne disease was less clear.

The findings from this study tell us that treated bednets should not be used as the only means of treating malaria in areas where vectors feed mainly in the evening. Use of an insect repellent can significantly reduce the risk of malaria. The combined use of a repellent and a treated bednet should be advocated to those travelling to malaria risk areas.


'/>"/>

Contact: Lindsay Wright
lindsay.wright@lshtm.ac.uk
020-792-72802
London School of Hygiene & Tropical Medicine
Source:Eurekalert

Related medicine news :

1. Comparison of obstetric outcomes between on-call and patients own obstetricians
2. Mailman School of Public Health study examines link between racial discrimination and substance use
3. New link between estrogen and breast cancer
4. Link Uncovered Between Benign Prostatic Hyperplasia and NSAIDs, Says Harvard Mens Health Watch
5. Link Between Chronic Pain and Insomnia Uncovered at PAINWeek 2007
6. Scientists demonstate link between genetic variant and effectiveness of smoking cessation meds
7. Researchers discover correlation between GERD and obesity in females
8. NIH awards $10.8M to Columbia to study connection between diabetes and heart disease
9. Researchers Pinpoint Link Between Caloric Restriction and Longevity
10. Link Between Air Pollution, Stroke Gets Clearer
11. No Link Between Anti-Nausea Drug, Heart Trouble
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/13/2016)... , ... February 13, 2016 , ... Hidden Cypress in Sun City is the place ... facial plastic surgery. Dr. Frederick Weniger will be hosting this educational seminar from ... event, and there will be special pricing on offers. In addition, prizes will be given ...
(Date:2/13/2016)... (PRWEB) , ... February 13, 2016 , ... The producers ... impact of American businesses. , The increasingly modern world of instantaneous consumption proves ... on non-renewable energy sources such as oil and coal, which pollutes our air, water, ...
(Date:2/13/2016)... ... 13, 2016 , ... DDi , a Makro company, ... for its expertise in eClinical Solutions. DDi has built its solution competency with ... of global clients. DDi provides smarter technology for Clinical Development, Regulatory and Enterprise ...
(Date:2/12/2016)... ... February 12, 2016 , ... The Lymphoma ... innovative lymphoma research and serving the lymphoma community through a comprehensive series of ... South Florida’s philanthropic community at its 10th anniversary Fashion Luncheon on Monday, February ...
(Date:2/12/2016)... , ... February 12, 2016 , ... Coco Libre, the ... in Red Carpet Events LA GRAMMY’s Style Lounge Event. Coco Libre will offer musicians ... stay hydrated before the big event. The invitation-only gifting suite, held this year at ...
Breaking Medicine News(10 mins):
(Date:2/12/2016)... and Company (NYSE: LLY ) today announced that the ... patent would not presently be infringed by Actavis marketing pemetrexed ... Italy and Spain ... --> --> In ... Lilly,s patent would be indirectly infringed by Actavis marketing certain ...
(Date:2/12/2016)... , Feb. 12, 2016  Apellis Pharmaceuticals, ... a $47.1 million Series D preferred stock ... Management, Hillhouse Capital Group and venBio Global ... Investments, AJU IB Investment, and Epidarex Capital. The ... to further advance clinical trials in the ...
(Date:2/11/2016)... , Feb. 11, 2016 The primary goal ... future adoption patterns on the usage of liquid biopsy. ... following: - Timeframe of liquid biopsy adoption ... cfDNA and Evs—by organization type - Sample inflow to ... blood, saliva, stool, serum, and so on. - Correlation ...
Breaking Medicine Technology: