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Infections and associated behaviors among deceased organ donors: Informing the assessment of risk.

BACKGROUND: For infectious disease risk assessment among deceased organ donors, pre-donation clinical, microbiological, and behavioral information are reviewed; however, uncertainty may arise due to false negative screening results of recently acquired infections.

METHOD: The burden of hepatitis B virus (HBV), hepatitis C virus (HCV) and human immunodeficiency virus (HIV), and residual risks (RR) of undetected virus was estimated, with the impact of more sensitive screening.

RESULTS: For United Kingdom potential deceased organ donors between 2010 and 2014, prevalence of HBsAg was 0.1%, HIV 0.06% and HCV 0.9%, increasing to 25.7% in people who injected drugs (PWID). Incidence, derived from new blood donors, was multiplied by duration of screening assay window periods to give RR per 100 000 donors as 0.43 (95% confidence interval [CI] 0.03-3.99) for HBV, 0.08 (95% CI 0.02-0.21) for HIV, and 5.96 (95% CI 0.82-37.89) for HCV. For PWID, HCV RR was 163.3 (95% CI 22.8-1107.8) compared to 2.76 (95% CI 0.35-17.36) for non-PWID. RR decreased significantly with nucleic acid testing (NAT), and, for HCV, antigen testing had a similar impact.

CONCLUSION: While the burden of HCV risk lies within PWID, these are in small numbers therefore few HCV antigen or NAT tests would be needed to more accurately assess risk.

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