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Microbiology > Gram Positive Rods > Flashcards

Gram Positive Rods Flashcards

1
Q

Bacillus cereus Morphology

A

Large green colonies
Rough or Ground Glass Appearance
Beta hemolysis
GS: GPB with spores

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2
Q

Bacillus cereus Reactions

A

Catalase = Positive
Oxidase = Positive
Lecithinase = Positive
Penicillin = Resistant
Motile

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3
Q

Bacillus species Reactions

A

Beta Hemolytic (most)
GS: GPB with spores
Catalase = Negative
Oxidase = Positive
Lecithinase = Negative
Penicillin = Variable
Motile

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4
Q

Listeria moncytogenes Morphology

A

Narrow zone of Beta Hemolysis
CAMP = Positive (shovel pattern)
GS: Short GPR or GPCB

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5
Q

Listeria monocytogenes Reactions

A

Catalase = Positive
Bile Esculin = Positive
VP = Positive
Motile only at 25 C
Non-spore forming

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6
Q

Listeria monocytogenes Disease

A

Fifth most common cause of meningits

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7
Q

Corynebacterium species Info

A

GS: GPR with pallisades
Skin contaminate
Catalase = Positive

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8
Q

Corynebacterium diphtheriae Morphology

A

Requires special media
Tinsdale or CTBA = Black colonies/brown with halo
GS: GPR with pallisades

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9
Q

Corynebacterium diphtheriae Reactions

A

Catalase = Positive
Oxidase = Positive
Nitrate = Positive
Urease = Negative
Elek = Positive
Ferments: Glucose and Maltose

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10
Q

Corynebacterium diphtheriae Disease

A

Respiratory tract
Skin lesion

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11
Q

Erysipelothrix rhusiopathae Info

A

Alpha hemolytic
Catalase = Negative
H2S = Positive
Non-motile

** Associated with Pigs **

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12
Q

Lactobacillus species

A

Alpha hemolytic
Catalase = Negative
H2S = Negative

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13
Q

Arcanobacterium haemolyticum Info

A

Beta Hemolytic
Catalase = Negative
CAMP = Reverse Positive
GS: Thin GPR

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14
Q

Gardnerella vaginalis Morphology

A

Beta hemolytic on Human Blood
PPT to tiny clear colonies
V agar: Colonies are yellow - hydrolyzes starch

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15
Q

Gardnerella vaginalis Reactions

A

GS: Gram Variable Pleomorphic Rods
Causes Clue Cells in Vaginal Wet Preps
40% KOH = Whiff Test (Fishy Odor)

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16
Q

Rhodococcus equi Info

A

Pink Colonies
GS: GPCB
Partial Acid Fast = Positive
Catalase = Negative
Urease = Positive
Non-motile

17
Q

Bacillus anthracis Morphology

A

Non-hemolytic
Medusa head colony
GS: GPB with spores

18
Q

Bacillus anthracis Reactions

A

Nitrate = Positive
Lecinthinase = Positive
Non-motile

19
Q

Bacillus anthracis Disease

A

1) Cutaneous (MOST COMMON) = Primary lesion, black eschar, secondary spread through lymphatics and septicemia

2) Pulmonary = Higher fatalities, respiratory distress and edema

3) Gastrointestinal (MOST SEVERE) = Rarest form of disease, ingestion of spores from contaminated meat

Microbiology (9 decks)

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