[Malaria attack: a difficult diagnosis in a region of high Plasmodium falciparum endemicity].

The diagnosis of malaria attack in regions for highly endemic P. falciparum is difficult. It is more so since the wide use of antimalarials by the infected populations and the spread of drug resistance. A positive test is not evidence for a malarial attack since in certain schools, in both rural regions and in some districts of big towns, over 3/4 of the children attending school are carriers of Plasmodium. On the other hand, true attacks, even severe forms, can occur without evidence of parasitaemia. The parasitic load is thus an important factor but the following must be taken into consideration: age, level of immunity, the extent of transmission and whether if is continuous or not, self medication and the initial systematic treatments, the possibility of drug resistance, ... The difficulties are illustrated by data collected in the Congo.