Abstract
This study assessed the prevalence of visceral leishmaniasis in blood donors from three endemic regions in Brazil and evaluated the risk of transmission by transfusion. Despite strong evidence of the transmission of visceral leishmaniasis through blood transfusion, the real risk, an essential condition for taking effective measures to control this serious disease, has not been determined. A multicentre study was performed in highly endemic areas. Candidates eligible for their first blood donation underwent a socio-epidemiological interview, and blood samples were collected for enzyme-linked immunosorbent assay (ELISA) analysis, Western blot and polymerase chain reaction (PCR). Patients transfused with red blood cells or random platelet concentrates collected from these donors were also studied. The results were analysed using descriptive statistics and prevalence estimates, with significance defined as p-values <0·05. Of the 608 eligible donors, 37 (6·1%) were positive for visceral leishmaniasis as per ELISA. The socio-epidemiological analysis showed a significantly higher prevalence in non-Caucasians (p = 0·008). Among 296 patients who received blood components from these donors, the pre-transfusion seropositivity was 7·7%, an...Continue Reading
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