| 释义 |
beta hemolysis
beta hemolysis[′bād·ə hə′mäl·ə·səs] (microbiology) A sharply defined, clear, colorless zone of hemolysis surrounding certain streptococci colonies growing on blood agar. beta hemolysis
β he·mol·y·siscomplete or "true" hemolysis observed in blood agar cultures of various bacteria, especially hemolytic streptococci and staphylococci; virtually all the erythrocytes are destroyed in a relatively wide, regularly circumscribed, circular zone about the colony, thereby resulting in a clear "halo" of transparent agar; the zone of hemolysis is frequently much wider than the diameter of the colony; the degree of change varies with species of erythrocytes. |