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TRANSFUSION COMPLICATIONS: Seroprevalence of Babesia microti in blood donors from Babesia‐endemic areas of the northeastern United States: 2000 through 2007

BACKGROUND: Current estimates of 70 cases of transfusion‐transmitted Babesia microti, with 12 associated deaths, suggest that Babesia is a growing blood safety concern. The extent of Babesia infections among blood donors has not been well defined. To determine how common exposure to B. microti is among blood donors, a seroprevalence study was undertaken in the American Red Cross Northeast Division.