Rapid control of malaria by means of indoor residual spraying of alphacypermethrin in the Democratic Republic of São Tomé and Príncipe.
A 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.
Tseng
Lien Fen
LF
The Anti-Malaria Team of Taiwan, Medical Mission to São Tomé and Príncipe, São Tomé and Príncipe.
Chang
Wen Chun
WC
Ferreira
Maria Conceição
MC
Wu
Cheng Hua
CH
Rampão
Herodes Sacramento
HS
Lien
Jih Ching
JC
D000818:Animals; D000852:Anopheles / Q000469:parasitology; D001266:Atlantic Islands / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D006798:Housing; D006801:Humans; D007303:Insect Vectors / Q000469:parasitology; D007306:Insecticides; D008288:Malaria / Q000453:epidemiology / Q000517:prevention & control*; D009032:Mosquito Control / Q000379:methods*; D018512:Parasitemia / Q000453:epidemiology / Q000517:prevention & control; D010961:Plasmodium / Q000302:isolation & purification; D011722:Pyrethrins; D013997:Time Factors; D014934:Wood
D007306:Insecticides; D011722:Pyrethrins; C017160:cypermethrin