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Microbiology > Gram-Positive Bacilli > Flashcards

Gram-Positive Bacilli Flashcards

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Biology 101 flashcards
1
Q

displays Babes-Ernst granules

A

Corynebacterium sp.

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2
Q

grows on Loeffler’s serum agar

A

Corynebacterium sp.

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3
Q

CTBA agar

A

cystine-tellurite blood agar

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4
Q

Corynebacterium sp. shows this on CTBA agar

A

brown halo

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5
Q

used to measure toxigenicity of C. diphtheriae

A

Elek’s test

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6
Q

diphtheria toxin: fragment A function

A

cytotoxic, inhibits protein synthesis

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7
Q

the diphtheria antitoxin is made in ______

A

horses

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8
Q

diphtheria toxin: fragment B function

A

binds to cell membrane receptors to mediate entry of fragment A

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9
Q

diphtheria toxin production is inversely proportional to ______________

A

iron availability

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10
Q

Corynebacterium morphology under microscope

A

club-shaped

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11
Q

the two forms of diphtheria

A

respiratory and cutaneous

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12
Q

how diphtheria toxin causes death

A

toxin enters blood, systemic infection, cardiac failure

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13
Q

Listeria morphology under microscope

A

coccobacillus

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14
Q

humans are exposed to listeria in ________ (2 things)

A

dairy products and processed meat

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15
Q

listeriolysin O function

A

hemolytic and cytotoxic; allows organism to survive inside macrophages

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16
Q

Listeria surface protein p60 function

A

induces phagocytosis through adhesion and penetration into mammalian cells

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17
Q

effects of listeriosis in pregnant women

A

premature labor and spontaneous abortion

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18
Q

Listeria grows at this unusual temperature

A

4 C

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19
Q

Listeria shows this kind of motility at 25 C

A

umbrella

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20
Q

Listeria shows this kind of motility in a wet prep

A

tumbling

21
Q

Listeria is catalase-_______

A

positive

22
Q

Corynebacterium is catalase-_______

A

positive

23
Q

Listeria CAMP test produces ______-hemolysis

A

block

24
Q

Arcanobacterium shows this on agar

A

black dot under colonies

25
Q

Arcanobacterium and Erysipelothrix are catalase-_______

A

negative

26
Q

Gardernella vaginalis stains gram-_______

A

variable

27
Q

grow G. vaginalis on these types of agar (2 types)

A

human blood bilayer Tween agar (HBT) and V agar

28
Q

atmospheric requirement for Nocardia

A

aerobic

29
Q

Nocardia staining properties

A

weakly acid-fast, gram-variable

30
Q

this genus looks like a molar tooth on agar

A

Actinomadura

31
Q

Actinomadura colonies are white but can _________

A

become red

32
Q

develops salmon-pink pigment after 4-7 days

A

Rhodococcus

33
Q

N. cyriaciageorgica and N. farcinica cause

A

necrosis with abscesses

34
Q

N. braziliensis causes

A

actinomycotic mycetomas

35
Q

Streptomyces smell

A

woodsy

36
Q

Streptomyces appearance

A

waxy, glabrous, heaped

37
Q

B. anthracis capsule is composed of ________

A

antiphagocytic D-glutamate

38
Q

cutaneous anthrax appearance

A

painless black pustule

39
Q

pulmonary anthrax symptoms

A

fever, fatigue, malaise; then respiratory distress, coma, death w/n 24 hrs

40
Q

four types of anthrax

A

cutaneous, pulmonary, gastrointestinal, injectional

41
Q

B. anthracis morphology (agar and microscope)

A

agar: medusa-head/beaten egg white colonies, string of pearls when exposed to penicillin
microscope: bamboo

42
Q

B. anthracis - hemolysis and motility

A

nonhemolytic, nonmotile

43
Q

B. cereus - hemolysis and motility

A

beta-hemolytic, motile (flagella)

44
Q

Bacillus is catalase-______

A

positive

45
Q

Bacillus causes these diseases

A

food poisoning and eye infections

46
Q

2 types of Bacillus food poisoning

A

emetic (fried rice) and diarrheal (meat, poultry, soup)

47
Q

spore-forming gram-positive rods

A

Bacillus sp.

48
Q

Erysipelothrix causes ________

A

painful swelling of hands

Microbiology (4 decks)

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