Enterobacteriaceae Flashcards

1
Q

gram
shape
catalase
oxidase

A

gram negative
rod
catalase positive
oxidase negative

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2
Q

what do they hide cell wall with

A

outer membrane

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3
Q

CEEK

A

citrobacter
e coli
enterobacter
klebsiella

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4
Q

CEEK lactose?

A

lactose fermenters
coliform bacteria

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5
Q

SYP-Sh

A

salmonella
proteus
yersina
shigella

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6
Q

SYP-Sh lactose?

A

lactose non fermenters
highly pathogenic

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7
Q

IMViC tests

A

indole
methylred
VP
citrate

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8
Q

macconkey negatives

A

salmonella, yersinia, proteus
yellow color

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9
Q

macconkey positives

A

citrobacter, enterobacter, klebsiella
red color

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10
Q

indole negatives

A

klebsiella, enterobacter, salmonella, yersinia, proteus

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11
Q

indole positives

A

citrobacter

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12
Q

voges proskauer negatives

A

citrobacter, salmonella, yersinia, proteus

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13
Q

voges proskauer positives

A

klebsiella, enterobacter

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14
Q

citrate negatives

A

yersinia, proteus

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15
Q

citrate positives

A

salmonella, klebsiella, enterobacter, citrobacter

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16
Q

urease negatives

A

salmonella, enterobacter

17
Q

urease positives

A

yersinia, proteus, klebsiella, citroabcter

18
Q

TSI CO2 gas, yellow

A

enterobacter, klebsiella

19
Q

TSI H2S gas, black

A

salmonella, proteus, citrobacter

20
Q

TSI no gas, yellow

21
Q

respiration
fastidious?
spore?
media?
motility?

A

facultative anaerobes
non fastidious
non spore forming
grow on bile media (Macconkey)
most are motile (except shigella and klebsiella)

22
Q

general habitat
Proetus habitat

A

small and large intestines
proteus – lungs, vulva, vagina

23
Q

transmission route
yersinia pestis transmission
opportunistic?
commensal?

A

oral fecal transmission route
yersinia pestis – flea bites
commensal of GI tract, opportunistic pathogen

24
Q

exit

A

feces, urine, milk, nasal discharge

25
what do they cause
GI infection -- diarrhea, dehydration lever abscess UTI meningitis mastitis
26
what about diarrhea causes morbidity and mortality
acid base imbalance electrolyte imbalance
27
surface structures
capsule flagella fimbriae adhesin invasins LPS -- pyrogenic, fever
28
enzymes
catalase superoxide disumutase -- detoxify free radicals
29
toxins
hemolysin -- kills host RBC, make iron available siderophores, enterobactin -- rob irone from host cells pathogenicity island -- encodes toxins, enzymes, T3SS
30
antigenic diversity
LPS (O) antigen flagella (H antigen) capsule (K antigen)
31
what does lipid A do
endotoxin destroys blood vessels, induce fever
32
culture media
blood agar macconkey eosin methylene blue (EMB) triple sugar iron
33
contributes 3 members of ESKAPE
enterobacter aerogenes (klebsiella aerogenes) klebsiella pnuemoniae enterobacter cloacae