Key characteristics of SCVs compared to the normal phenotype

SCVNormal phenotype (NP)
Colony size after 24 h of incubationInvisible or pinpoint (1/10 the size of NP)1–3 mm
PigmentationNot present or reducedUnpigmented or colored gradation of yellow-orange
HemolysisNot present or reducedWeak to strong zone of beta-hemolysis
  • a Characteristics are species and strain dependent. Those of the most prevalent staphylococcal species encountered in human specimens are given here; for divergent features of other staphylococcal species, refer to respective reviews and textbooks (25, 115).