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Microbiology > Gram Positive > Flashcards

Gram Positive Flashcards

1
Q

Virulence factor of S. aureus which prevents complement activation

A

Protein A

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2
Q

Virulence factor of S. aureus which is also called spreading factor

A

Hyaluronidase

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3
Q

MCC of acute endocarditis

A

S. aureus

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4
Q

Cardiac valve affected by S. aureus in IV drug abusers

A

Tricuspid valve

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5
Q

Sequestered focus of osteomyelitis arising in the metaphyseal area of a long bone caused by S. aureus

A

Brodie abscess

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6
Q

Food most commonly infected by S. aureus that causes AGE

A

Mayonnaise (potato or tuna salad)

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7
Q

Also known as Ritter Disease

A

SSSS

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8
Q

Area of separation in the skin in SSSS

A

Stratum granulosum

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9
Q

Also known as Lyell disease

A

TEN

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10
Q

Area of separation in the skin in TEN

A

Dermo-epidermal junction

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11
Q

Usual scenario in toxic shock syndrome

A

Tampon using; nasal packing

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12
Q

DOC for methicillin-sensitive S. aureus

A

Penicillinase-resistant penicillin:
Naficillin
Oxacillin
Dicloxacillin

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13
Q

DOC for methicillin-resistant S. aureus

A

Vancomycin

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14
Q

DOC for vancomycin-resistant S. aureus

A

Linezolid

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15
Q

MCC of prosthetic valve endocarditis, septic arthritis in prosthetic joints, and VP shunt infections

A

S. epidermidis

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16
Q

DOC for S. epidermidis infection

A

Vancomycin

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17
Q

2nd MCC of UTI in sexually active women

A

S. saprophyticus

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18
Q

DOC for S. saprophyticus

A

TMP-SMX

Quinolones

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19
Q

Positive PYR test

A

S. pyogenes or Group D strep

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20
Q

S. pyogenes toxin which causes scarlet fever

A

Erythrogenic toxin

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21
Q

S. pyogenes toxin which causes TSS

A

Pyogenic exotoxin A

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22
Q

S. pyogenes toxin which causes necrotizing fasciitis

A

Exotoxin B

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23
Q

Test which is used to document antecedent pharyngitis caused by S. pyogenes

A

ASO titer

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24
Q

Test which is used to document antecedent skin infection caused by S. pyogenes

A

Anti DNAse B

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25
Perioral blistered lesions with honey-colored crust
Impetigo contagiosa
26
Complication of impetigo contagiosa
PSGN
27
Superficial infection extending into dermal lymphatics caused by S. pyogenes
Erysipelas
28
Virulence factor of S. pyogenes which facilitates cellulitis
Hyaluronidase (spreading factor)
29
MC bacterial cause of sore throat
S. pyogenes
30
Skin test for susceptibility of scarlet fever
Dick test
31
Strawberry tongue Sandpaper-like skin Pastia's lines
Scarlet fever
32
DOC for PSGN
Penicillin G
33
Culture medium of S. agalactiae
Lim broth
34
MCC of neonatal pneumonia, sepsis, and meningitis
S. agalactiae | Group B strep
35
Causes endocarditis in patients who underwent GIT surgery
Enterococcus faecalis | group D strep
36
Causes marantic endocarditis in patients with colorectal ca
S. bovis
37
Gram-positive "lancet-shaped" cocci in pairs (diplococci)
S. pneumoniae
38
Encapsulated bacteria
``` Some Killers Have Pretty Nice and Shiny Bodies S. pneumoniae K. pneumoniae H. influenzae P. aeruginosa N. meningitidis S. typhi B group streptococci ```
39
MCC of CAP
S. pneumoniae
40
Rust-colored sputum | Lobar pattern pneumonia
S. pneumoniae
41
MCC of otitis media, sinusitis, and bacterial meningitis
S. pneumoniae
42
Causes dental caries
Streptococcus mutans | Viridans strep
43
Causes subacute bacterial endocarditis; MCC of subacute and native valve endocarditis
Streptococcus sanguis | Viridans strep
44
Most potent aminoglycoside
Amikacin
45
Catalase negative Bile optochin sensitive Alpha hemolytic Positive quellung reaction
S. pneumoniae
46
Catalase negative Bile optochin resistant Alpha hemolytic
Viridans streptococci
47
Catalase negative Bacitracin sensitive Beta hemolytic
S. pyogenes
48
Catalase negative Bacitracin resistant Beta hemolytic
S. agalactiae
49
Catalase negative | Gamma hemolytic
Group D streptococci
50
Catalase positive | Coagulase positive
S. aureus
51
Catalase positive Coagulase negative Novobiocin sensitive
S. epidermidis
52
Catalase positive Coagulase negative Novobiocin resistant
S. saprophyticus
53
Spore-forming gram positive rods
Bacillus | Clostridium
54
Non spore-forming gram positive rods
Corynebacterium | Listeria
55
Spore-forming gram positive rod; box car-shaped; medusa head morphology
B. anthracis
56
Reheated fried rice
B. cereus
57
Spore-forming gram positive rod; tennis racket-like; lollipop shape
C. tetani
58
Non spore forming gram positive rod; | Curved; chinese characters
C. diphtheriae
59
Non spore forming gram positive rod; associated with unpasteurized milk
L. monocytogenes
60
Causes Woolsorter's disease
B. anthracis | Inhalational anthrax
61
DOC for infections causes by B. anthracis
Ciprofloxacin
62
Most dreaded form of anthrax
GI anthrax
63
3 infections which causes pulmonary hemorrhage
Inhalational anthrax Weil's disease Congenital syphilis
64
Causes chinese fried rice syndrome
B. cereus
65
Tx for AGE caused by B. cereus
Symptomatic treatment only
66
Pathogenesis of tetanus
Tetanospasmin inhibits the release of glycine from Renshaw cells in spinal cord
67
DOC for tetanus
Metronidazole
68
DOC for tetanus in children
Penicillin
69
Bulging canned goods
C. botulinum
70
Pathogenesis of botulism
Botulinum toxin blocks acetylcholine release causing flaccid paralysis (descending pattern)
71
Triad of botulism
Symmetric descending flaccid paralysis Absence of fever Intact sensorium
72
Causes floppy baby syndrome
C. botulinum | Aka infant botulism
73
Double hemolysis on blood agar
C. perfringens
74
Causes gas gangrene
C. perfringens
75
Toxin implicated in gas gangrene
Alpha toxin
76
Antibiotics implicated in pseudomembranous colitis
Clindamycin 2nd and 3rd generation cephalosporins Ampicillin
77
Causes pseudomembranous colitis
C. difficile
78
Metachromatic granules (Babes-Ernst/volutin granules)
C. diphtheriae
79
Toxigenicity of C. diphtheriae is detected using?
Modified elek test
80
Tumbling motility
L. monocytogenes
81
Cold enhancement (paradoxical growth in cold temperature
L. monocytogenes
82
Beta hemolytic yellow or golden colonies on blood agar
S. aureus

Microbiology (9 decks)

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