[Epidemiology and clinical aspects of malaria in Switzerland].
Plasmodium falciparum is the predominant plasmodium species in Africa south of the Sahara to a proportion of 80% and more. Two thirds of all cases of malaria in Switzerland are imported from Africa. Accordingly, malignant malaria is more frequently diagnosed in Switzerland than tertian malaria. Malignant malaria usually presents atypically, e.g. as acute gastrointestinal disease or as shock. The lethality is high. The majority of Swiss travellers are not protected effectively against malaria. A group particularly at risk are tourists of 20--30 years of age. It is suggested that travel agencies, official bodies and the medical profession should intensify public information regarding the dangers and prevention of malaria.