beta hemolysin

beta hemolysin
1. a hemolysin that produces beta hemolysis. 2. the hemolysin of the beta toxin of Staphylococcus aureus; it is a sphingomyelinase that lyses human and sheep erythrocytes in the cold following a warm incubation. See also staphylococcal toxin, under toxin.

Medical dictionary. 2011.

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  • β staphylolysin — beta staphylolysin a hot cold hemolysin produced by staphylococci which lyses sheep but not rabbit erythrocytes in the cold following preliminary incubation at 37°C …   Medical dictionary

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  • Hemolysis (microbiology) — Hemolysis is the breakdown of red blood cells. The ability of bacterial colonies to induce hemolysis when grown on blood agar is used to classify certain microorganisms. This is a particularly useful in classifying streptococcal species. A… …   Wikipedia

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