A simplified system for biotyping Staphylococcus aureus strains isolated from different animal species

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Abstract
A biotyping system for S. aureus strains is proposed which is a simplified version of biotyping procedures described in the literature. It differentiates S. aureus strains from man and animals into host-specific ecovars and biotypes which are not host-specific. With the help of tests for .beta.-hemolysin, staphylokinase, coagulation of bovine plasma and the crystal violet reaction, the origin of many but not all S. aureus strains can be determined: 604 of 809 strains from man, poultry, cattle, pigs, goats, rabbits and foods could be alloted to 4 ecovars which are typically associated with man, poultry, sheep and goats and cattle. The other strains belonged to 5 non-host specific biotypes.