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10 Cards in this Set
- Front
- Back
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Gram (+) cocci Catalase (+) Modified oxidase (-) Non motile Non spore forming Reduces nitrates to nitrites Grows in 7.5% - 10% NaCl Lyostaphin susceptible Bacitracin resistant Glucose fermenter. |
Staphylococcus |
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Gram (+) cocci in clusters Coagulase (+) Bound coagulase, clumping factor (+) Free coagulase (+) DNAse (+) Thermostable nuclease (+) MSA: growth & fermentation Beta hemolytic or non hemolytic on SBA Medium to large, raised colonies on BA and CNA with cream to golden yellow pigmentation.
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S. aureus |
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Part of CoNS Gram (+) cocci in clusters Coagulase (-) DNase (-) Novobiocin Susceptible Growth on CNA (+) Non hemolytic on blood agar Growth, but lack of fermentation of MSA White, creamy, raised growth on blood agar.
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S. epidermidis |
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Coagulase (-) DNAse (-) Non hemolytic on blood agar Mannitol is variable Fermentation (+) Novobiocin resistant |
S. saprophyticus |
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Coagulase (-) DNAse (-) Non hemolytic on blood agar Mannitol is variable Fermentation (+) Novobiocin resistant. |
S. saprophyticus |
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Has a capsule Weakly catalase (+) Coagulase (-) |
Stomatococcus mucilanginosus |
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Gram (+) cocci in chains Catalase (-) Non motile Facultative anaerobes Small pinpoint & translucent or clear colonies. |
Streptococcus |
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An important distinction from Staphylococcus and Streptococcus ? |
Catalase reaction |
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Gram (+) cocci occurring in pairs or chains Catalase (-) Non motile Non spore forming Facultative anaerobes Some species show enhanced growth under increased CO2 (5-10%) Require supportive or enriched media such as blood agar for growth Susceptible to vancomycin. |
Streptococcus |
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Gram (+) diplococci Lancet or bullet shaped Isolated in SBA and requires 5% to 10% CO2. Most common test is OPTOCHIN TEST (“P” DISK) |
S. pneumoniae |
