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Abstract
The adherence of 4 isolates of Serratia marcescens, 1 isolate of Serratia liquefaciens, 1 of Pseudomonas aeruginosa, and 2 of Staphylococcus epidermidis to blood transfusion sets (CPD-SAGMAN) consisting of bags and connecting tubing was tested. All strains adhered well to the connecting tubes (polyvinyl chloride) from the transfusion sets from 3 manufacturers. Three isolates from a Swedish outbreak of septicaemia associated with contaminated blood bags showed greater adherence than an isolate from a urinary tract infection. There was no significant adherence of S. marcescens to the blood bags. In general, there were no significant differences in the adherence of a given isolate to the plastics from different manufacturers. Appropriate hygienic procedures for the production of transfusion sets appear to be of greater importance than differences in the plastic material as regards the incidence of transfusionrelated bacteremia.