Abstract
A cell-bound hemolytic activity was found in several strains of Serratia marcescens. One Serratia cell per ten erythrocytes was sufficient to cause complete lysis of human erythrocytes within 2 h in the liquid assay. The hemolytic activity resided in the membrane fraction and could be inactivated by incubating cells with proteases. The hemolytic activity was greatly enhanced in actively metabolizing Serratia cells and was partially controlled by the iron supply. Hemolysis was accompanied by degradation of erythrocyte membrane proteins (band 3 and 6, glycophorin) and was independent of the blood group. The exoprotease secreted by S. marcescens in large amounts was not involved in hemolysis. Comparison with various hemolytic strains of Escherichia coli showed that hemolysis of erythrocytes was more pronounced with S. marcescens than with E. coli. In contrast to hemolysis by E. coli, lysis of erythrocytes by S. marcescens was not enhanced by Ca2+ ions.
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Dedicated to Professor Dr. Gerhart Drews on the occasion of his 60th birthday
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Braun, V., Günther, H., Neuß, B. et al. Hemolytic activity of Serratia marcescens . Arch. Microbiol. 141, 371–376 (1985). https://doi.org/10.1007/BF00428852
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DOI: https://doi.org/10.1007/BF00428852