Gram Postitive Cocci Identifying features Flashcards by Valini Gosine | Brainscape

Q

Staph aureus

A

Catalase +

Coagulase +

Beta Hemolytic (blood agar)

Ferments mannitol

Slat tolerant

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Q

Stap epidermidis

A

Catalase +

Coagulase -

gamma hemolytic (no hemolysis of blood agar)

Novobiocin Sensitive

Usually more of an oportunistic infxn

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Q

Stap saprophyticus

A

catalase +

coagulase -

gamma hemolytic

novobiocin resistant

UTI’s in newly sexually active females

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Q

Strep pyogenes

(Group A)

A

Catalase -

Coagulase -

Beta hemolytic (complete lysis of blood agar)

Bacitracin Sensitive

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Q

Strep agalactiae

(Group B)

A

catalase -

coagulase -

Beta hemolytic

CAMP test +

Bacitracin Resistant

neonatal septicemia & meningitis

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Q

Strep pneumoniae

A

catalase -

coagulase -

alpha hemolytic (green on agar)

Lancet shaped diplococci

Polysaccharide capsule

Optichin Sensitive

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Q

Strep viridians group

A

catalase -

coagulase -

alpha hemolytic (green on agar)

Optichin Resistant

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Q

Enterococcus

(Group D)

A

catalase -

coagulase -

alpha, beta or gamma hemolytic

PYR+ (enzyme)

Esculin agar (black)

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Q

Staph Vs. Strep

A

Staph

clusters
yellow colonies
coagulase +/ catalase +
Ferments mannitol

Strep

Chains
coagulase -/ catalase -
serotyped based on ab to cell wall carbohydrates

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