[Asiatic dengue in France: 9 cases, of which one of the thrombopenic type (author's transl)].

Asiatic dengue was detected in nine tourists. In eight patients it was of the classical benign type, the ninth case being associated with severe thrombopenia (4 000/mm3), but without signs of shock. A brief summary is given of the physiopathology of the hemorrhagic forms of the disease: acquired sensitivity from a primary attack and reinfection with a heterologous virus; selection of virulent strains by an atypical vector; genetic recombination producing a strongly pathogenic virus.