THE HAEMOLYTIC ACTIVITY OF HAEMOPHILUS SPECIES

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Abstract
The importance of the species of blood employed for detection of hemolysis in 77 Haemophilus strains of human and porcine origin was studied. Significant differences in the visibility of hemolytic zones obtained on the different blood agar media were observed. In decreasing order, the suitability of the species of blood was: calf, sheep, human, rabbit, poultry and horse blood. On plates containing washed sheep or calf red cells the hemolysin of all 36 strains of H. pleuropneumoniae acted synergistically with the .beta.-toxin of the Staphylococcus aureus strain used as feeder strain, giving rise to a lytic phenomenon resembling the CAMP [Christie, Atkins, Munch-Peterson] reaction. [This study has taxonomic implications.].