The first isolations of eastern encephalitis, group C and Guama group arboviruses from the Peruvian Amazon region of western South America.

‘Also appearing in Spanish in the Boletin de la Oficina Sanitaria Panamericana, 1975. %his research, performed in collaboration with the Pan American Health Organization and the Government of Peru, was sponsored by the United States Army Medical Research and Development Command, Washington, D.C. 20314 (under Contract NO. DADA17-72-C-2140), and by the University of San Marcos, the University of the Peruvian Amazon, and the Institute of Public Health of Peru. 3Department of Microbiology, Cornell University Medical College, New York, New York 10021, U.S.A. 41nstitute of Public Health of Peru and University of San Marcos. %niversity of San Marcos. 6University of the Peruvian Amazon. in the Amazon region of Peru at 8” 3O’south latitude, 74” 30’west longitude. Iquitos, the capital of Loreto, is located near the base of the Amazon River at 4” south latitude, 73” west longitude. Hamsters were flown to Lima, Peru, from the Lakeview Hamster Colony, New Jersey, in September 1970.