Figure 1.

Sheep blood agar plates (A–E) and magnified sectors (a–e) after overnight incubation at 37°C showing different morphotypes of clonal isolates of the Staphylococcus lugdunensis strain recovered from blood cultures and the infected pocket of a patient with pacemaker infection. Plates A–D/a–d show S. lugdunensis colonies exhibiting the normal phenotype characterized by colonies of different diameter, ranging from 0.8 to 2.5 mm with creamy (A/a) or yellow (B–D/b–d) pigmentation and moderately heavy (B/b), weak (C–D/c–d), or absent (A/a) hemolysis; plate E/e shows the small-colony variant phenotype characterized by tiny (pinpoint), nonpigmented, and nonhemolytic colonies.