摘要:In a study in a population in northern Tanzania, almost all adults and schoolchildren with parasitaemia were positive in the PHA test, whereas only half of the children under 5 years of age with parasitaemia were serologically positive. A second study on infants up to the age of 18 months confirmed that many young children who could be expected to have been exposed to malaria did not have PHA-detectable antibody. Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (319K), or click on a page image below to browse page by page. Links to PubMed are also available for Selected References . 662 663 664