Enterobacteriaceae

Question 1

Heat sable antigen located in the cell wall (LPS)

Answer 1

O antigen

Question 2

Flagellar antigen; heat stable

Answer 2

H antigen

Question 3

Capsular antigen; heat labile

Answer 3

K antigen

Question 4

antigen of Salmonella typhi only

Answer 4

Vi antigen

Question 5

Traveler’s diarrhea, contaminated food and drink, has heat labile toxin and heat stable toxin

Answer 5

Enterotoxigenic (ETEC)

Question 6

infantile diarrhea in children less than a year, found in daycares, due to adhesions

Answer 6

Enteropathogenic (EPEC)

Question 7

Rare in US, dysentery, watery diarrhea with scant stool, pus, mucus, and blood, do not ferment lactose

Answer 7

Enteroinvasive (EIEC)

Question 8

hemorrhagic diarrhea, colitis, HUS, watery diarrhea progressing to bloody diarrhea without pus, can be fatal, produces verotoxin I and II

Answer 8

Shiga-toxigenic (STEC)

Question 9

adheres to surface of small intestine, watery diarrhea lasting more than 2 weeks, commensals from colon

Answer 9

Enteroaggregative (EAEC)

Question 10

Escherichia isolated from wounds

Answer 10

Escherichia hermanii, Escherichia vulneris

Question 11

similar to K. pneumoniae but indole positive

Answer 11

K. oxytoca

Question 12

formerly enterobacter agglomerans, similar to Klebsiella pneumoniae, plant pathogen, yellow

Answer 12

Pantoea agglomerans

Question 13

meningitis and bacteremia in neonates from powdered infant formula, mucoid

Answer 13

Cronobacter sakazakii

Question 14

proteus, indole negative, ornithine decarboxylase positive

Answer 14

P. mirabilis

Question 15

proteus, indole positive, ornithine decarboxylase negative

Answer 15

P. vulgaris

Question 16

Morganella, UTI infections, possible agent of diarrhea, similar to Proteus

Answer 16

M. morganii

Question 17

Providencia, UTI, occasionally nosocomial outbreaks

Answer 17

P. rettgeri

Question 18

Providencia, nosocomial burn unit outbreaks, also is in urine cultures, no swarming

Answer 18

P. sturatii

Question 19

Edwardsiella, urea negative, lysine decarboxylase positive, H2S positive, indole positive, no growth on citrate

Answer 19

E. tarda

Question 20

Only oxidase positive Enterobacteriaceae

Answer 20

Plesiomonas