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Hemolytic activity of staphylococcus hyicus and staphylococcus chromogenes


, : Hemolytic activity of staphylococcus hyicus and staphylococcus chromogenes. Acta Veterinaria Brno 57(1-2): 3-12

Hemolytic activity of 135 S. hyicus and 75 S. chromogenes strains was examined on sheep, rabbit, human, horse and chicken blood agars. The agar bases were supplemented with 5% washed erythrocytes of the corresponding animal species. The strains of both staphylococcal species under study produced a wide zone of complete hemolysis on rabbit blood agar and a narrow one on media containing horse erythrocytes. The hemolytic effects always appeared after 48 h incubation at 37.degree. C. Neither species produced hemolysis on agar containing sheep or chicken erythrocytes, and no synergistic hemolytic effect was observed on sheep blood agar. A direct hemolysis was exhibited by 92 (68%) S. hyicus strains on human blood agars. The remaining S. hyicus strains and S. chromogenes did not produce hemolysis of human erythrocytes. Hemolytic effects of the staphylococci used as controls were expressed just after 24 h incubation on all kinds of blood agar. We recommend inclusion of the hemolysis of rabbit erythrocytes among the characteristic properties of S. hyicus and S. chromogenes.

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