Staphylococci sp
| |Staphylococci sp. |Streptococci sp. |
|Species to learn: |Staph. aureus |Strep. pyogenes (group A) |
| |Staph. epidermidis |Strep. pneumoniae (none) |
| | |Strep. agalactiae (Group B) |
| | |Strep. bovis (Group D) |
| | |Enterococcus faecalis (D) |
| | |Enterococcus faecium (D) |
| | |Strep. mutans (Viridians) |
| | | |
|Gram stain |Gram +, cocci |Gram +, cocci |
| | | |
|Cell arrangement |clusters |chains |
| | | |
|Pyogenic (produces puss) |Yes |Yes |
| | | |
|Hemolysis patterns |Yes |Yes |
|shown in blood agar | | |
| | | |
|Beta hemolysis- |Staph aures |Strep. pyogenes |
|clear | |Strep. agalactiae |
| | | |
|Alpha hemolysis- |Staph epidermidis |Strep. pneumoniae |
|cloudy, green | |Enterococcua feacium |
| | | |
|Gamma hemolysis- |You don’t need to know specific examples. |You don’t need to know specific examples. |
|no RBC lysis | | |
| | | |
|Coagulase test |Yes, + = Staph. aureus |NO |
|Coagulase enzyme |- = non- Staph. aureus | |
|“clot in blood plasma” | | |
| | | |
|Agglutination tests |Yes, + = Staph. Aureus |There are tests available. |
|Antigens & antibodies |- = non- Staph. aureus | |
|“clumping” | | |
| | | |
|Antigens |Protein A |(Carbohydrates- Lancefield) |
| | |Antigen A |
| | |Antigen B |
| | |Antigen C |
| | |Antigen D |
| | |Viridians group |
| | |Non-grouped |
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