The incidence of clinical malaria detected by active case detection in children in Ifakara, southern Tanzania

摘要: Between July 2000 and June 2001, we used weekly active case detection (ACD) of clinical malaria episodes in 618 children aged < 5 years to describe the epidemiology Ifakara, southern Tanzania. Plasmodium falciparum-positive blood slides prepared from with axillary temperature 37.5 degrees C were define a rolling cross-sectional survey documented prevalences parasitaemia anaemia. A random subsample was visited daily for 1 month at end study assess effect more frequent visits on estimated incidence rates. Only 50 (8%) had or during year, an overall 0.275 episodes/100 child-weeks-at-risk, no age dependence. The maximum parasite prevalence 25% reached 4 years. illness significantly lower than those weekly, suggesting marked We conclude that pattern detected through ACD is robust epidemiological indicator absolute rate estimates that, contrast surrounding area, Ifakara town subject only moderate perennial transmission.