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Microbiology > Appearance > Flashcards

Appearance Flashcards

1
Q

Buttery looking

Pinhead colonies

A

Staphylococcus aureus

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2
Q

Gray, pinpoint colonies

A

Staphylococcus epidermidis

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3
Q

Oval/lancet-shaped

“dimple-shaped” “dome-shaped”

A

Streptococcus pneumoniae

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4
Q

Gram-variable, pleomorphic

“Satellites” around organism with pyridoxal

A

Abitrophia, Granulicatella

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5
Q

Coffee / kidney-bean shaped

A

Neisseria gonorrhoeae

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6
Q

Rod- shaped

A

“N. WEB”

Neisseria elongata
Neisseria bacilliformis
Neisseria weaver

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7
Q

Bluish gray colonies on BAP

A

Neisseria meningitidis

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8
Q

“Bread-crumbs”

A

Neisseria sica

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9
Q

Resemble Neisseria; grow from end to end with adjacent sides flattened

“Hockey-puck” appearance

A

Moraxella catarrhalis (Branhamella catarrhalis)

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10
Q

“Stacked brick” appearance

A

Enteroadherent E. Coli (EAEC)

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11
Q

Musty, pungent, “rotten potato-like” odor

A

Serratia odorifera

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12
Q

“Burnt chocolate or gunpowder” odor

A

Proteus

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13
Q

Closed safety pin, with bipolar bodies

Broth: Stalactite-shaped pattern

A

Yersinia pestis

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14
Q

With bipolar bodies

“Bull’s eye” appearance in CIN

A

Yersinia enterolitica

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15
Q

Comma, curved bacilli

A

Vibrio

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16
Q

“Bull’s eye” appearance in CIN

A

Aeromonas

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17
Q

S-shaped rods, seagull wing-shaped

Tailing effect, spreading

A

Campylobacter

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18
Q

S-shaped rods, similar to Campylobacter

A

Helicobacter

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19
Q

Metallic sheen in BAP, “grape-like” or “corn tortilla” odor

A

Pseudomonas aeruginosa

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20
Q

Mistaken as Neisseria

A

Acinetobacter

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21
Q

“Ammonia” odor

BAP = lavender-green colonies

MAC = blue colonies

A

Stenotrophomonas maltophilia

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22
Q

Non-wrinkled yellow colonies in BAP

A

Buckholderia cepacia

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23
Q

With bipolar bodies

A

Buckholderia pseudomallei

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24
Q

Comma, curved bacilli

Violet (violacein pigment)

A

Chromobacterium violaceum

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25
Q

Fruity odor (“apples or strawberries”)

A

Alcaligenes faecalis

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26
Q

Mucoid and greenish (including media)

A

Shewanella putrefaciens

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27
Q

“Amorphous serous material”

A

Haemophilus spp.

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28
Q

“Mousy” or “bleach-like” odor

A

Haemophilus influenzae

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29
Q

“School of fish”

A

Haemophilus ducreyi

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30
Q

“Star-shaped” appearance

A

Aggregibacter actinomycetemcomitans

31
Q

“False Gram positive” reactions in some parts of cells

Exhibit “rosette” formation, pits agar

A

Cardiobacterium hominis

32
Q

“Sandy” appearance

33
Q

“Mercury drops” in Berdet-Gengou agar

A

Bordetella pertussis

34
Q

Faint bipolar staining

A

Francisella tularensis

35
Q

“Mushroom smell”

A

Pasteurella multocida

36
Q

“Rainbow color” colonies in buffered charcoal yeast extract (BCYE) agar

A

Legionella

37
Q

Box-shaped with “empty spaces” (central spores)

A

Bacillus spp.

38
Q

“Bamboo fishing rod” appearance
BAP = “Medusa head” with swirling projection
Inoculating loop = “beaten egg white” appearance
Penicillin = “string of pearls”
Gelatin medium = “inverted pine tree”

A

Bacillus anthracis

39
Q

“Frosted glass” appearance; spreading growth

A

Bacillus cereus

40
Q

“Ground glass” appearance; exhibit pigment atoms in BAP

A

Bacillus subtilis

41
Q

“Blister-like” appearance in BAP

A

Bacillus pumilus

42
Q 
“Club-shaped” swellings
Highly pleomorphic, resemble Chinese letters
“Poached egg”
Biotype mitis = “Fried egg”
Biotype gravis = “Daisy head”
A

Corynebacterium diptheriae

43
Q

V-shaped forms and palisades

Pinpoint colonies

A

Corynebacterium urealyticum

44
Q

Parallel rows or palisades; does not exhibit any other characteristic “pleomorphism” from other spp.

A

Corynebacterium pseudodiptheriticum

45
Q

Club-shaped, V forms

A

Corynebacterium jeikeium

46
Q

Resemble Streptococci spp.

A

Listeria monocytogenes

47
Q

“Pipe cleaner” or “test tube brush” appearance in gelatin stab culture

A

Erysipelothrix rhusiopathiae

48
Q

BAP = “Medusa head”

NA = Rhizoid growth

49
Q

Beaded appearance

A

Aerobic Actinomycetes

50
Q

Wrinkled, chalk-like, orange-tan pigmentation

51
Q

Very similar to Nocardia spp.

“Molar tooth” appearance&nbsp

A

Actinomadura

52
Q

“Musty basement” odor

A

Streptomyces

53
Q

“Zigzag pattern”

A

Rhodococcus equi

54
Q

“Sharp bleach odor” pits agar

A

Eikenella corodens

55
Q

“Cauliflowerxlike” with coroding

A

Mycobacterium tuberculosis

56
Q

Distinct crossbanding

Culture: exhibit dark red crystals of 10-b-carotene

A

Mycobacterium kansaii

57
Q

With cross-barring

A

Mycobacterium marinum

58
Q

No crossbanding

A

Mycobacterium ulcerans

59
Q

“Cigar-shaped” or “pocket-fence” arrangement

A

Mycobacterium leprae

60
Q

Subterminal spores “boxcar-shaped”

BAP: double zone of hemolysis
Litmus-milk: Stormy fermentation

A

Clostridium perfringes

61
Q

Terminal spores, “drumstick” or “tennis racket” appearance

A

Clostridium tetani

62
Q

Subterminal spores

A

Clostridium botulinum

63
Q

Subterminal spores

Culture: “ground-glass” appearance in CFFA
BAP: horse-stable odor

A

Clostridium difficile

64
Q

Young colonies: “Spider-like” or “wooly”

Old colonies: “Molar tooth”

A

Anaerobic Actinomycetes

65
Q

“Dog bone” shape. Pits agar

A

Bacteroides ureolyticus

66
Q

“Seagull wing” shaped; fluorescent chartreuse color

A

Eubacterium

67
Q

Media turns green upon air exposure, “breadcrumb-like” colonies

A

Fusobacterium

68
Q

“Mulberries” or morula

69
Q

“Fried egg appearance”

A

Mycoplasma hominis

70
Q

Dark brownish lumps on A7 or A8 agar

A

Ureaplasma urealyticum

71
Q

“L forms or “yeast-like” shape

BAP - “Fried egg” appearance
Broth - “fluff balls/ bread crumps”

A

Streptobacillus moniliformis

72
Q

Safety pin appearance, presence of donovan bodies

A

Klebsiella (calymmatobacterium) granulomatis

73
Q

Spindle-shaped (slight yellow or orange pigmentation)

A

Capnocytophaga

Microbiology (4 decks)

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