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Deet and permethrin as protectants against malaria-infected and uninfected Anopheles stephensi mosquitoes.

Deet and permethrin were evaluated as protectants against Plasmodium falciparum-infected, P. berghei-infected and uninfected Anopheles stephensi mosquitoes. Deet 50% effective dose (ED50) values were 3.2 micrograms/cm2 for P. falciparum-infected and 1.9 micrograms/cm2 for uninfected mosquitoes; permethrin values were 0.5 micrograms/cm2 and 0.6 micrograms/cm2, respectively. Deet ED50 values were 2.3 micrograms/cm2 for P. berghei-infected and 1.3 micrograms/cm2 for uninfected mosquitoes; the permethrin values were both 0.5 micrograms/cm2. There were no significant differences in the protective efficacy of deet or permethrin between malaria-infected and uninfected An. stephensi mosquitoes.

Animals↗

[Malaria prophylaxis and self-care 1990--problems and current solutions].

For successful malaria prophylaxis, future travelers need to be informed about the risks of infection and about systematic measures to be taken against mosquito bites. For visits in areas of high transmission, continuous chemoprophylaxis is recommended, whereas in regions with low transmission a stand-by medication for self-therapy is sufficient. Each of these four measures has some problems which are discussed here in addition to the recently published recommendations by the Swiss Working Group for Medical Advice to Travelers.

Antimalarials↗

Effectiveness of soap formulations containing deet and permethrin as personal protection against outdoor mosquitoes in Malaysia.

Two soap formulations, both containing 20% deet and one each containing permethrin at 0.5 and 1.0%, respectively, were applied to exposed arms and legs of volunteers as personal protection against outdoor human biting mosquitoes in six locations on Penang Island, Malaysia. The predominant mosquito species collected from these locations were Aedes albopictus, Mansonia uniformis, Culex gelidus, Anopheles lesteri and Armigeres subalbatus. Efficacy and residual effects up to 4 hours indicated good protection against these species. Reduction in mosquito landing-biting rates in treated groups ranged from 83.8 to 100.0%. At high densities, small percentages of Ma. uniformis and An. lesteri landed or bit on treated skin. Use of the soap formulations in terms of cost-effectiveness, safety and overall vector control strategy for some tropical diseases is discussed.

Animals↗