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T4- Micro > ch 3 clinical bacteriology- gram + streptococci& gram - Neisseria > Flashcards

ch 3 clinical bacteriology- gram + streptococci& gram - Neisseria Flashcards

1
Q

(verulent factor) ___ antigen: inferferes with phagocytosis and adhesions in gpA strep

A

M- protein

virulent factor

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2
Q

gp A strept is transmitted though ____

A

respiratory

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3
Q

3 exotoxins formed by gpA strept

A

Hemolysin:
• strepolysin O: O2 labile
• streptolysin S: O2 stable

Pyrogenic exotoxin: TSS

Erythrogenic toxin: vasodilation → scarlet fever

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4
Q

3 enzymes formed by gpA strept

A

Fibrinolysin (streptokinase): dissolves fibrin

Streptodornase: dissolves DNA & necrotic tiss

Hyaluronidase (spreading factor): dissolves hyaluorinc acid & polysaccharide

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5
Q

2 toxigenic dx that can be caused by gpA strept

A

TSS & scarlet fever

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6
Q

post strept diseases

A

Rheumatic fever: cross rxn w/ antigens in heart and jts

acute glomerulonephritis: type III allergy on the caps

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7
Q

What type of allergy is gpA strept

A

Type III allergy

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8
Q

characteristic of gpA strept bl agar

A

zone of hemolysis and greenish discoloration

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9
Q

2 subtypes of gp A strept

A

Strept viridans

Strept pneumonia

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10
Q

Morphology of S. viridans vs S. pneumonia

A

Viridans: chain, spherical, non-capsulated

Pneumoniae: diplococci, capsulated

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11
Q

___ identifies S. pneumoniae

A

optochin

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12
Q

There is a (+) Quellung rxn on the capsule of a ___ bacteria

A

S. pneumoniae

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13
Q

Strept is gram ____

A

+

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14
Q

2 Neisseria groups

Gram ___

A

groups: meningococci & Gonococci

gram -

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15
Q

meningococci & Gonococci are ___ shaped

___ cocci

A

kidney shaped

diplococci

meningococci: has a capsule

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16
Q

(2) virulence factors of gonococci

A

Pili

outer membrane

17
Q

meningococci & Gonococci (endo/ exo) toxins?

& _____ protease

A

endotoxins

IgA protease

18
Q

Waterhouse-Friderichsen sx is ass. with ___ bact

A

meningococci (Neisseria, gram -)

19
Q

What type of agar is used for Neisseria group: meningococci & Gonococci

and a ____ test for fermenting

A

chocolate agar

oxidase test

20
Q

ocidase test:
meningococci ferments:_____
Gonococci ferments: ____

A

meningococci: ferments glucose and maltose

Gonococci: ferments glucose only

21
Q

anything with ____ has a vaccine for a tx

A

capsule

T4- Micro (11 decks)

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