| seroprevalence of borrelia burgdorferi in romania. | in order to assess the seroprevalence of borrelia burgdorferi in romania and to define associated risk factors, a cross-sectional, observational study was performed in 13 districts during 1999. sera from healthy blood donors (1,598) and from forestry workers (1,048) were tested. a two-step testing strategy was used in which sera were tested for anti-b. burgdorferi antibodies by a commercially available passive hemagglutination assays (pha). all pha positive sera were then evaluated by western bl ... | 2001 | 12081110 |