Bacteriology Flashcards

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1
Q

Difference in cell wall between gram + and Gram - bacteria?

A

Gram - has LPS present and thinner peptidoglycan (periplasmic space present)

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2
Q

Techoic acid found on gram negative or positive bacteria?

A

Gram +

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3
Q

What causes Lipid A septic shock?

A

LPS on outer membrane of gram -

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4
Q

What do obligate anerobes lack?

A

superoxide dismutase and catalase

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5
Q

inhibits transformation?

A

DNAse

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6
Q

Viral filter inhibits?

A

Transduction

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7
Q

Conjugation inhibited by?

A

bacterial filter

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8
Q

Which genetic excahnge is with environmental DNA?

A

Transformation

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9
Q

Which gram + coccie is catalase positive and which is negative?

A

Catalase positive is staph and negative is strep

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10
Q

Staph aureus is ccoagulase + or negative?

A

+

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11
Q

Staph aureus responsible for what?

A

TSS
Scalded skin syndrome
Wound infection
honey colored crusts

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12
Q

Coagulase - and novobiocin sensitive?

A

staph epidermis

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13
Q

Staph epidermis causes what?

A

think catheters/implanted devices due to biofilm

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14
Q

Staph sapro is novobiocin resistant of sensitive?

A

resistant

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15
Q

What does staph sapro cause?

A

UTI

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16
Q

Catalase negative (So we know its strep) beta hemolytic and bacitracin sensitive?

A

S. Pyogenes

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17
Q

S. pyogenes (Group A strep) symptoms?

A

pharyngitis, scarlet fever, gomerulo nephritis

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18
Q

S. agalactiae is bacitracin resistant or sensitive?

A

resistant

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19
Q

Neonatal sepsis and meningitis caused by what kind of strep?

A

agalactiae

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20
Q

Catalase negative alpha hemolytic and optochin sensitive is…

A

S. pneumo

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21
Q

What differences between S. pneumo and S. mutans (viridans)?

A

S. pneumo has capsule and is bile soluble

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22
Q

Dental caries?

A

S. viridans

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23
Q

bacteria capsule purpose?

A

to prevent it from being phagocytosed

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24
Q

Anterior nares?

A

Staph aureus

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25
Q

Superantigen?

A

Staph aureus and strep pyogenes

26
Q

Which type of gram + cocci causes food poisoning?

A

S aureus

27
Q

M protein

A

Strep pyogenes

28
Q

Rheumatic fever?

A

Strep pyogenes (group A strep)

29
Q

Enterobacteriae different from other gram negative bacilli because they are all (5)

A
facultative anerobic
ferment glucose
reduce nitrate to nitrite
oxidase (-)
all have LPS or endotoxin on outer membrane
30
Q

How to tell difference between enterobacteriae?

A

Look at sugar fermentation pathway

31
Q

What produces tryptophanase and what does it do?

A

E. Coli and it cleaves tryptophan, producing indole

32
Q

ETEC is known as….

A

Traveler’s diarrhea

33
Q

EHEC main symptom?

A

bloody diarrhea

34
Q

common type of EHEC?

A

O157: H7

35
Q

How do screen for EHEC?

A

Sorbitol MacConkey agar and confirm with shiga toxin assay

36
Q

Hemolytic uremic syndrome (think hamburger!) seen in…

A

EHEC

37
Q

Shiga toxin?

A

EHEC

38
Q

Non-motile gram - bacilli?

A

Shigella

39
Q

Shigella and lactose?

A

Does not ferment

40
Q

Shigella transmission?

A

fecal-oral

41
Q

Salmonella vs. Shigella?

A

Salmonella is motile but also non-fermenting of lactose

42
Q

Repiles?

A

Salmonella

43
Q

Salmonella produces

A

H2S

44
Q

Raw eggs ingestion?

A

Typhimurium (Salmonella)…usually connected to sanitary conditions

45
Q

Rose spots

A

Typhi (salmonella)

46
Q

How to acquire Typhi

A

ingestion of fecally contaminated water

47
Q

Morbidity of Typhi due to?

A

enteric fever

48
Q

Bubonic plague?

A

Yersinia pestis

49
Q

Lymphadenopathy in groin, black skin lesion?

A

Yersinia pestis

50
Q

Cold temps, mimics appendicitis, puppy feces?

A

Yersinia enterocolitica

51
Q

B burgdorferi transmission?

A

ticks

52
Q

R. Rickettsii transmission?

A

ticks

53
Q

Giemsa stain: safety pin

A

Yersinia

54
Q

currant jelly URI

A

Klebsiella

55
Q

FAST lactose fermenters (gram negative bacilli)

A

Klebsiella, E. Coli, Enterbacter

56
Q

Gram posiive bacilli non spore forming anaerobic

A

Actinomyces, Lactobacillus

57
Q

Gram posiive bacilli non spore forming aerobic

A

Cornyebacterium diptheriae, listeria, tropheryma whipplei

58
Q

Grey pseudomembrane

A

Corynebacterium diptheriae

59
Q

Whipples disease, PAS positive, poor gram staining

A

Tropheryma whipplei

60
Q

Chinese letters

A

Corynebacterium diptheriae

61
Q

Bullneck

A

Cornyebacterium dip