| dengue epidemic--peru, 1990. | from march to july 1990, an epidemic of classical dengue caused by dengue types 1 and 4 (den-1 and den-4) occurred in iquitos and the surrounding area of the department of loreto in the amazon region of peru (figure 1). a smaller outbreak was reported in tarapoto in the neighboring department of san martin. although cases were reported in peru during 1953-1955 and in 1958 (1), the epidemic in 1990 was the first laboratory confirmation of indigenous transmission of dengue in peru. this report sum ... | 1991 | 1899900 |