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BackgroundBrazil requires the performance of both a test for hepatitis B surface antigen (HBsAg) and a test for antibodies to the core of hepatitis B for blood donor screening. Blood centres in regions of high HBV endemicity struggle to maintain adequate stocks in face of the high discard rates due to anti‐HBc reactivity. We evaluated the potential infectivity of donations positive for anti‐HBc in...
The presence of Treponema pallidum DNA was assessed by real‐time PCR in samples of blood donors with reactive serologic tests for syphilis. Treponema pallidum DNA was detected in two (1·02%) of 197 samples of VDRL>8, EIA+ and FTA‐ABS+ donors, and in no sample from 80 VDRL−, EIA+ and FTA‐ABS+ donors. Donors VDRL−, EIA+ and FTA‐ABS+ lack demonstrable T. pallidum DNA in their blood and are unlike...
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