alpha hemolysis
A greenish zone of partial clearing around a bacterial colony growing on blood agar.

Microbiology. . 2009.

Look at other dictionaries:

  • alpha hemolysis — n a greenish discoloration and partial hemolysis of the red blood cells immediately surrounding colonies of some streptococci on blood agar plates compare BETA HEMOLYSIS * * * the production of a zone of greenish discoloration surrounding a… …   Medical dictionary

  • alpha hemolysis — noun : a greenish discoloration and partial hemolysis of the red blood cells immediately surrounding colonies of certain streptococci on blood agar plates …   Useful english dictionary

  • 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

  • Hemolysis — (or haemolysis) from the Greek Hemo , Greek Polytonic|Αἷμα meaning blood, lysis, meaning to break open is the breaking open of red blood cells and the release of hemoglobin into the surrounding fluid (plasma, in vivo ). In vivo hemolysis In vivo… …   Wikipedia

  • Hemolysis — The destruction of red blood cells which leads to the release of hemoglobin from within the red blood cells into the blood plasma. Etymology: The word hemolysis is made up of hemo , blood + lysis , the disintegration of cells. * * * Alteration,… …   Medical dictionary

  • alpha hemolysin — 1. a hemolysin producing alpha hemolysis. 2. the hemolysin of the alpha toxin of Staphylococcus aureus, which hemolyzes rabbit, sheep, cow, and goat but not human erythrocytes. See also staphylococcal toxin, under toxin …   Medical dictionary

  • Alpha toxin — or alpha toxin refers to several different protein toxins produced by bacteria. Alpha toxin may be:*Staphylococcus aureus alpha toxin, a membrane disrupting toxin that creates pores causing hemolysis and tissue damage. *Clostridium perfringens… …   Wikipedia

  • beta hemolysis — n a sharply defined clear colorless zone of hemolysis surrounding colonies of certain streptococci on blood agar plates compare ALPHA HEMOLYSIS * * * the production of a clear zone immediately surrounding a bacterial colony on blood agar medium,… …   Medical dictionary

  • Staphylococcus aureus alpha toxin — Alpha Toxin is secreted by Staph. aureus bacteria. It is a membrane disrupting toxin that creates pores causing hemolysis and tissue damage. It has phospholipase C activity.ee also*Phospholipase C *Peripheral membrane proteinsExternal links*… …   Wikipedia

  • Streptococcus — Not to be confused with Staphylococcus. Streptococcus Scientific classification Kingdom: Bacteria Phylum …   Wikipedia

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