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[Risk of infection transmission by blood components]
Objective:
Assessment of the present risk of blood-borne infection associated with homologous blood transfusion in Central Europe with particular emphasis on HIV and HCV infections.
Data Sources:
The relevant literature in the English and German language and the authors' data.
Study Selection:
No special study has been carried out for the present paper.
Results:
The recognition of the risk for transmitting HIV by transfusion has led to a bundle of measures which have improved the safety of blood supply in Germany. A stricter donor selection as well as screening for HIV 1 and HIV 2 have reduced the risk to transmit HIV to the order of 1 per 1 million units transfused. The transmission of hepatitis B is estimated to be in the order of 1:50,000. The anti-HCV testing, introduced in 1990, has markedly reduced the transmission of HCV to less than 1:5,000 per unit as judged from our own data. A further reduction is expected by an improved HCV screening in the near future. Fatal disease from bacterial contamination is rare, with an estimated risk of one in a million units. Syphilis transmitted by transfusion is virtually not occurring anymore. However, increased efforts should continue to enhance the safety of blood, bearing in mind that a zero risk is not achievable for effective therapies. The estimation of risks is a dynamic, time-dependent value which has to be estimated for a geographically defined population for a given time period.
Conclusions:
The risk of transfusion-associated infection has been markedly reduced in recent years. Albeit there is a small but definitive risk, which is often overestimated. The risks have to be defined to estimate the risk/benefit ratio of the homologous as well as the autologous transfusion for the individual patient.