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

Abstract

Foci of statistically higher B. microti seroprevalence among blood donors were observed; however, B. microti transfusion transmission risk exists for blood collected throughout Connecticut and portions of Massachusetts. Similarly, a seasonal peak was identified; nevertheless, seropositive donations were found year-round. Thus, geographic and/or seasonal exclusion methods are insufficient to fully safeguard the blood supply from Babesia transmission. Steps should be taken to reduce risk of transfusion-transmitted B. microti, perhaps through implementation of year-round, regional testing.