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Blood Agar Plates and Hemolysis: Staphylococcus and Other Catalase Positive Gram-Positive Cocci Send Print

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Created: Friday, 30 September 2005
Last update: Tuesday, 23 July 2013
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Staphylococcus aureus (Enlarged view)
FIG. 1. Large, creamy white, beta hemolytic colonies typical of Staphylococcus aureus. (Rebecca Buxton, University of Utah, Salt Lake City, UT)
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Staphylococcus aureus (Enlarged view)
FIG. 2. Large, creamy white, beta hemolytic colonies typical of Staphylococcus aureus. (Rebecca Buxton, University of Utah, Salt Lake City, UT)
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Staphylococcus aureus (Enlarged view)
FIG. 3. Large, creamy white, beta hemolytic colonies typical of Staphylococcus aureus. (Rebecca Buxton, University of Utah, Salt Lake City, UT)
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Staphylococcus aureus (Enlarged view)
FIG. 4. Large, creamy white, beta hemolytic colonies typical of Staphylococcus aureus. (Rebecca Buxton, University of Utah, Salt Lake City, UT)
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Staphylococcus aureus (Enlarged view)
FIG. 5. Strains of Staphylococcus aureus may or may not produce a golden yellow pigment. (beta hemolytic, non-pigmented strain. Compare with Figure 6). (Rebecca Buxton, University of Utah, Salt Lake City, UT)
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Staphylococcus aureus (Enlarged view)
FIG. 6. Strains of Staphylococcus aureus may or may not produce a golden yellow pigment. (beta hemolytic, yellow-pigmented strain. Compare with Figure 5). (Rebecca Buxton, University of Utah, Salt Lake City, UT)
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Staphylococcus epidermidis (Enlarged view)
FIG. 7. Non-hemolytic Staphylococcus species: Staphylococcus epidermidis. (Most species of coagulase negative Staphylococcus species are non-hemolytic). (Rebecca Buxton, University of Utah, Salt Lake City, UT)
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Staphylococcus epidermidis (Enlarged view)
FIG. 8. Non-hemolytic Staphylococcus species: Staphylococcus epidermidis. (Rebecca Buxton, University of Utah, Salt Lake City, UT)
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Staphylococcus epidermidis (Enlarged view)
FIG. 9. Non-hemolytic Staphylococcus species: Staphylococcus epidermidis. (Rebecca Buxton, University of Utah, Salt Lake City, UT)
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Staphylococcus saprophyticus (Enlarged view)
FIG. 10. Staphylococcus saprophyticus: non-hemolytic, bright white, creamy colonies (recovered almost exclusively from urinary tract infections in young, sexually active females). (Rebecca Buxton, University of Utah, Salt Lake City, UT)
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Micrococcus luteus (Enlarged view)
FIG. 11. Micrococcus luteus: Dramatic bright yellow pigment (no hemolysis). (Rebecca Buxton, University of Utah, Salt Lake City, UT)
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REVIEWERS

This resource was peer-reviewed at ASM Conference for Undergraduate Education 2005.

Participating reviewers:

Samuel Fan
Bradley University, Peoria, IL

Ashalla Freeman
University of North Carolina, Chapel Hill, NC

Roxana Hughes
UNT Biological Sciences, Denton, TX

D. Sue Katz
Rogers State University, Claremore, OK

Lucy Kluckhohn Jones
Santa Monica College, Santa Monica, CA

Patricia  Shields
University of Maryland, College Park, MD

Erica Suchman
Colorado State University, Ft. Collins, CO
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