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ID Board Review > Gram Stain Characteristics > Flashcards

Gram Stain Characteristics Flashcards

1
Q

Micrococcus

A

GPC in clusters, often found in tetrads

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2
Q

Aerococcus

A

GPC in clusters

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3
Q

Rothia

A

GPC in clusters

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4
Q

Streptococcus pneumoniae

A

GPC in pairs (lancet-shaped)

Can be gram variable

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5
Q

Viridans group streptococci (including some s. pneumoniae)

A

GPC in pairs and chains

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6
Q

Beta-hemolytic streptococci (eg. strep pyogenes)

A

GPC in pairs and chains

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7
Q

Enterococcus

A

GPC in pairs and chains

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8
Q

Abiotrophia

A

GPC in pairs and chains (nutritionally variant strep)

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9
Q

Granulicatella

A

GPC in pairs and chains (nutritionally variant strep)

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10
Q

Bacillus

A

GPR - may be big and boxy, may have spores

Can be gram variable or gram negative

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11
Q

Clostridium

A

GPR - may be big and boxy, may have spores

Can be gram variable or gram negative

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12
Q

Listeria

A

GPR, may appear coccobacillary

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13
Q

Lactobacillus

A

GPR

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14
Q

Eggerthelia

A

GPR

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15
Q

Corynebacterium

A

GPR - coryneform

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16
Q

Cutibacterium (formerly propionibacterium)

A

GPR - coryneform

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17
Q

Actinomyces

A

GPR - coryneform, may be beaded and/or have sulfur granules on histopathology

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18
Q

Erysipelothrix

A

GPR - coryneform

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19
Q

Mycobacterium

A

Beaded GPR

20
Q

Nocardia

A

Beaded or branching, filamentous GPR

21
Q

Streptomyces

A

Branching, filamentous GPR

22
Q

Gordonia

A

Branching, filamentous GPR

23
Q

Tsukamurella

A

Branching, filamentous GPR

24
Q

Gardnerella vaginalis

A

Gram-variable rod

25
Q

Leptotrichia

A

Gram-variable rod

GNR - fusiform

26
Q

Veillonella

A

GNC

27
Q

Acidaminococcus

A

GNC

28
Q

Megasphaera

A

GNC

29
Q

Neisseria

A

GN diplococci

30
Q

Moraxella catarrhalis

A

GN diplococci or coccobacilli

31
Q

Haemophilus

A

GN coccobacilli

32
Q

Acinetobacter

A

GN coccobacilli (may be gram variable)

33
Q

Aggregatibacter

A

GN coccobacilli

34
Q

Pasteurella multocida

A

GN coccobacilli or GNR

35
Q

Bacteroides

A

GN coccobacilli

36
Q

Francisella tularensis

A

GN coccobacilli

Tiny gram-negative rods, “junky” gram stain

37
Q

Brucella

A

GN coccobacilli

Tiny gram-negative rods, “junky” gram stain

38
Q

Enterobacteriaceae

A

GNR

39
Q

Non-fermenters (pseudomonas, achromobacter, acinetobacter)

A

GNR

40
Q

HACEK

A

GNR

41
Q

Fusobacterium nucleatum

A

GNR - fusiform

42
Q

Capnocytophaga

A

GNR - fursiform

43
Q

Campylobacter

A

GNR - curved, “seagull-shaped”

44
Q

Helicobacter

A

GNR - curved

45
Q

Arcobacter

A

GNR - curved

46
Q

Anaerobiospirillum

A

GNR - curved

47
Q

Vibrio

A

GNR - curved/comma shaped

ID Board Review (5 decks)

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