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MICROBIOLOGY 2.0 > Enterobacteriaceae > Flashcards

Enterobacteriaceae Flashcards

0
Q

His antigenic structure is mainly composed of repetitive polysaccharide units

A

O antigen

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1
Q

This antigenic structure interferes with O antisera

A

K antigen

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2
Q

This is the most external part of the cell wall LPS

A

Somatic antigen

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3
Q

This antigen reacts with IgG

A

Flagellar antigen

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4
Q

Among the 3 antigen, which is heat stable

A

O antigen

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5
Q

This antigen is composed of either protein or polysachharides

A

Capsular antigen

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6
Q

This is associated with virulence

A

Capsular antigen

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7
Q

They are preserved with formalin and reacts with IgG

A

Flagellar antigen

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8
Q

This group mainly ferments and do not oxidize. True or false

A

True

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9
Q

They are both catalase and oxidase positive.

A

False. Oxidase negative

Cannot oxidize

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10
Q

Describe.

3M FAzza

A

3M FAzza

Most pathogenic
Most motile
Most often encountered

Fac. Anaerobe

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11
Q

They are motile because of their peritrichious flagella. Except?

A

SK - mabagal

Shigella
Klebsiella

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12
Q

True pathogens are

A

YESS

Yersinia
E coli
Shigella
Salmonella

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13
Q

This type of toxin has specific effect on host cell

A

Exotoxin

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14
Q

Mainly protein based

A

Exo

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15
Q

Lipid A is a toxic component

A

Endo

16
Q

Mainly LPS based

A

Endo

17
Q

Varied effect

A

Endo

18
Q

Produced only by gram negative

A

Endo

19
Q

State the fast slow and non LF

A

EEK
CHASE
PSS

20
Q

This culture contains bile salts and crystal violet which inhibita growth of gram positive and fastidious nega

A

MacConkey

21
Q

What is the result in MacConkey for non LF and LF

A

Non LF - Transparent

LF - red colonies

22
Q

In EMB agar what is present that inhibit the growth of gram positive and fastidious negative

A

Aniline dyes

Eosin and methylene blue

23
Q

EMB RESULT or non lf and lf

A

non lf - transparent

Lf - green black with metallic sheen

24
Q

Indicator of acid prodxn in emb agar

A

Anilin dyes combine to form a precipitate

25
Q

This is the only agar that can differentiate nonlf

A

Emb agar

26
Q

This agar also has bile salts and acid indicators such as bromthymol blue and acid fuschin

A

Hektoen agar

27
Q

This agar is useful in identifying potential pathogen from normal flora in stool

A

Hektoen agar

28
Q

Result of hektoen

A

Non lf - green to blue green

Lf - orange

29
Q

Characterize E coli

A 
Smooth 
Motile
Flat 
Non viscous
Metallic sheen
30
Q

Non LF that is non motile, no gas formed

A

Shigella

31
Q

Non LF, swarming on agar. Hydrolyses urea rapidly

A

Proteus

32
Q

LF, non motile, very mucoid and viscous

A

Klebsiella

33
Q

Rapid LF, motile, has mo metallic sheen yet mucoid

A

Enterobacter

34
Q

Positive on urease test

A

Proteus
Klebsiella

P-u-K

35
Q

Positive on SIM

A
  • indole - proteus, e coli

- motility - pees me

36
Q

Positive on citrate or simmon test

A

CSK

CITRO
SALMO
KLEB

MICROBIOLOGY 2.0 (7 decks)

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