University of South Carolina School of Medicine: Alvin Fox's "Staphylococci"
Read the section titled "Staphylococci." Watch the "Catalase Test Movie" under Fig.7. Take advantage of the PowerPoint lecture slides as you study. Study Figures 3 to 5 and 8 for micrographs.
Click http://web.archive.org/web/20160407030616/http://microbiologybook.org/fox/staph.htm link to open resource.