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An outbreak of dengue type 3 was studied in Central Java, Indonesia, in 1978. In contrast to previous dengue 3 epidemics in Central and East Java, this outbreak was less explosive, associated with mild illness, and low viremia. The dengue virus isolation rate from serologically confirmed patients was only 32% compared to 65% for an epidemic in Bantul a year earlier. Neither dengue hemagglutination-inhibition antibody titers nor day of illness on which specimens were collected accounted for this difference. These data suggest that some naturally occurring strains of dengue virus (endemic strains) are associated with low viremia and generally cause only mild illness in man.
Accepted for publication February 28, 1981.
Address reprint requests to: Publications Office, NAMRU-2, Box 14, APO San Francisco 96528.
* This study was supported by funds provided by the Ministry of Health, Indonesia, and the Naval Medical Research and Development Command, Navy Department, for Work Unit MR041.01.01-0151. The opinions and assertions contained herein are the private ones of the authors and are not to be construed as official or as reflecting the views of the Indonesian Ministry of Health, Navy Department, or the Naval Service at large.
Present address: San Juan Laboratories, CID, GPO Box 432, San Juan, Puerto Rico 00936.
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