Gram + algorithim Flashcards

1
Q

Gram + branching aerobe

A

Nocardia

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1
Q

Gamma hemolytic strep

A

GDS (Enterococcus)

Non-enterococcus (S. bovis)

(No hemolysis)

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1
Q

Enterococcus vs. Strep bovis

A

Enterococcus = growth in bile and 6.5% NaCl

Strep bovis = growth in bile but not 6.5% NaCl

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2
Q

G+ encapsulated

A

Pneumococcus

GBS

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3
Q

Gram + rod acid fast

A

Mycobacterium

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4
Q

Alpha hemolytic strep

A

Pneumococcus

Viridans strep

(green, incomplete hemolysis)

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5
Q

G+ yellow pigment

A

S. aureus

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7
Q

Gram + branching acid fast

A

Nocardia

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7
Q

G+ cocci catalse -

A

Strep

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8
Q

G+ branching filaments

A

Nocardia

Actinomyces

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8
Q

G+ yellow granules

A

Actinomyces

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9
Q

S. pyogenes

A

G+ coccus, catalse -, beta hemolytic, Bacitracin sensitive

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10
Q

Listeria

A

G+ rod exotoxin producer

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11
Q

G+ cocci exotoxin producers

A

S. aureus

GAS

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12
Q

Pneumococcus

A

G+ coccus, catalse -, alpha hemolytic, doesn’t grow in optochin or bile

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13
Q

Gram + rod catalse +

A

Listeria

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14
Q

G+ cocci catalse + coagulase -

A

S. epidermidis

S. saprophyticus

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15
Q

G+ with IgA protease

A

Pneumococcus

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16
Q

G+ cocci

A

Staph or strep

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16
Q

S. saprophyticus

A

G + cocci catalse + coagulase - Novobiocin resistant

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16
Q

S. mutans

A

G+ coccus, catalse -, grows in bile and optochin

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17
Q

Corynebacterium

A

G+ rod

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18
Q

Clostridium

A

G+ rod anaerobe toxin producers

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20
Q

Novobiocin resistant

A

S. saprophyticus

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21
Q

G+, catalse -, bacitracin resistant

A

GBS (also beta hemolytic)

22
Q

Pneumococcus vs. viridans strep

A

Both alpha hemolytic (green, incomplete)

Pneumococcus = capsule, bile sensitive, optochin sensitive

Viridans strep = no capsule, bile resistant, optochin resistant

23
Q

G+ cocci, catalse -, bacitracin sensitive

A

GAS (also beta hemolytic)

25
Q

Nocardia

A

G+ branching, acid fast aerobe

26
Q

Gram + rod anaerobe

A

Clostridium

28
Q

Gram + rod produces exotoxin

A

Listeria (listeriolysin)

C. perfringens (alpha toxin)

C. diphtheria

C. tetani (tetatnospasmin)

C. botulinum

29
Q

G+ with M protein

A

GAS

30
Q

Novobiocin resistant

A

S. saprophyticus

31
Q

G+ cocci coagulase + catalse +

A

S. aureus

32
Q

S. epidermidis

A

G + cocci catalse + coagulase - Novobiocin sensitive

33
Q

G+ with special stains

A
34
Q

G+ cocci, catalse -, grows in bile but not NaCl

A

S. bovis

(COLON CANCER!)

35
Q

G+ rods

A

Listeria

Clostridium

C. diphtheria

Bacillus

Mycobacterium

36
Q

Gram + acid fast

A

Nocardia

37
Q

Gram + rod aerobe

A

Bacillus

38
Q

Bacillus

A

G+ rod aerobe

38
Q

GAS vs. GBS

A

Both beta hemolytic (clear, complete)

GAS = bacitracin sensitive

GBS = bacitracin resistant

39
Q

S. epidermidis vs. S. saprophyticus

A

Novobiocin resistant = saprophyticus

Novobiocin sensitive = epidermidis

40
Q

G+ cocci, catalse -, bile sensitive

A

Pneumococcus

41
Q

E. faecalis

A

G+ coccus, catalse -, gamma hemolytic, grows in bile and NaCl

43
Q

Bacitracin

A

GAS vs. GBS

Resistant = GBS

Sensitive = GAS

45
Q

G+ cocci catalse +

A

Staph

46
Q

G+ with lysogenic phage-encoded exotoxins

A

Clostridium botulinum

Corynebacterium diphtheria

GAS

47
Q

Actinomyces

A

G+ branching anaerobe

47
Q

G+ cocci, catalse -, grows in bile and NaCl

A

Enterococcus

49
Q

S. agalactiae

A

G+ coccus, catalse -, beta hemolytic, Bacitracin resistant

50
Q

G+ coccus that’s catalase -, bile resistant, optochin resistant

A

Viridans strep (also alpha hemolytic)

51
Q

G+ cocci, catalase -, bile resistant

A

Enterococcus

Strep bovis

Viridans strep

52
Q

G+ brancing anaerobe

A

Actinomyces

53
Q

Mycobacterium

A

G+ rod aerobe acid fast

55
Q

S. aureus

A

Gram + cocci catalse + coagulase +

56
Q

G+ urease producers

A

Nocardia

S. epidermidis

S. saprophyticus

57
Q

Beta hemolytic strep

A

GAS

GBS

(Complete hemolysis)

58
Q

G+ coccus that’s catalse -, bile sensitive, optochin sensitive

A

Pneumococcus (also alpha hemolytic and has capsule)

59
Q

G+ with protein A

A

S. aureus

60
Q

S. bovis

A

G+ coccus, catalse -, gamma hemolytic, grows in bile but NOT NaCl