Rapid Control of Malaria by Means of Indoor Residual Spraying of Alphacypermethrin in the Democratic Republic of São Tomé and Príncipe
2008; American Society of Tropical Medicine and Hygiene; Volume: 78; Issue: 2 Linguagem: Inglês
10.4269/ajtmh.2008.78.248
ISSN1476-1645
AutoresLien Fen Tseng, Wen Chun Chang, Maria Conceição Alves Ferreira, Cheng Hua Wu, Herodes Sacramento Rampão, Jih Ching Lien,
Tópico(s)Mosquito-borne diseases and control
ResumoA nationwide yearly cycle of indoor residual spraying (IRS) with a pyrethroid, alphacypermethrin, at a dosage of 50 mg/m(2) was instituted in 2004 in the Democratic Republic of São Tomé and Príncipe. Rates of IRS acceptance were high, varying from 82% to 95% for dwellings and outhouses. Epidemiologic surveys of the children < 9 years of age before and after the first IRS cycle revealed a rapid reduction in malaria. Overall prevalence of malaria parasitemia for all districts was lowered from 20.1% to 2.8% at 12 months after the first IRS and reached 0.7% at 8 months after the second IRS. Longer insecticidal persistence was found on wood than on cement with alphacypermethrin.
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