Transmission of Plasmodium vivax malaria--San Diego County, California, 1988 and 1989.

Malaria transmission in the United States occurs infrequently; since 1950, 21 outbreaks of introduced malaria, all caused by Plasmodium vivax, have been identified. However, 14 of these occurred in California (seven during 1986 (1), 1988, and 1989). Four outbreaks--one each in 1986 (1) and 1988 and two in 1989--occurred in San Diego County. This report describes the outbreaks in San Diego County in 1988 and 1989.

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