Malaria: 30 years of experience at a New York City teaching hospital.

Two previous reviews summarized the New York Hospital experience with 110 cases of malaria from 1968 to 1990. We have extended these studies to include 59 cases of malaria seen from 1991 to 1999 and analyze trends over the past 30 years. Plasmodium falciparum remains the most common species, 38 (64%) of the 59 cases, with the majority of them, 34 (89%) of 38 cases, being acquired in Africa. Of the 59 cases, 22 (37%) were immigrants living in the United States who had visited their countries of origin. Only five (8%) of 59 patients reported using chemoprophylaxis. This represents a marked decrease from the previous reviews. None of the immigrants or their children used chemoprophylaxis. Diagnosis was prompt, and patients responded well to therapy. Complications of malaria were low and no deaths were reported, as was the case in the previous reviews. The low use of chemoprophylaxis, particularly among immigrants, is a major concern.