ENTEROBACTERIACEAE

Question 1

aka “enterics” or “coliforms”

Answer 1

Enterobacteriaceae

Question 2

most common cause of UTI in humans.

Answer 2

Uropathogenic E. coli (UPEC)

Question 3

adherence to epithelial cells

Answer 3

Pili — Uropathogenic E. coli (UPEC)

Question 4

inhibit immune effector cells

Answer 4

Cytolysins — Uropathogenic E. coli

Question 5

chelate iron

Answer 5

Aerobactin — Uropathogenic E. coli (UPEC)

Question 6

Also known “Montezuma’s revenge” or “turista”

Answer 6

Enterotoxigenic E. coli (ETEC)

Question 7

Disease of Enterotoxigenic E. coli (ETEC)

Answer 7

Epidemic (infant) diarrhea and traveler’s diarrhea

Question 8

Heat-labile (LT) and heat stable (ST) enterotoxins

Answer 8

Virulence factor — Enterotoxigenic E. coli (ETEC)

Question 9

Fimbria

Answer 9

Virulence factor — Enterotoxigenic E. coli (ETEC)

Question 10

Invades enterocytes causing Shigella like infection

Answer 10

Virulence factor — Enteroinvasive E. coli (EIEC)

Question 11

Disease of Enteroinvasive E. coli (EIEC)

Answer 11

Dysentery and Bloody stools

Question 11

Strains can be non-motile or non-lactose fermenter

Answer 11

Other Characteristics- Sereny test (+) — Enteroinvasive E. coli (EIEC)

Question 11

Bundle-forming pilus for attachment to cells of the small bowel.

Answer 11

Virulence factor — Enteropathogenic E. coli (EPEC)

Question 11

Infantile diarrhea (watery with mucus but no blood)

Answer 11

Disease — Enteropathogenic E. coli (EPEC)

Question 12

Also known as Verotoxic E.coli (VTEC)

Answer 12

Enterohemorrhagic E. coli (EHEC)

Question 13

Cytotoxin (Verotoxin I & II) similar to Shiga toxin

Answer 13

Virulence factor — Enterohemorrhagic E. coli (EHEC)

Question 14

Serotype O157:H7 strain (STEC) (sorbitol-MAC and MUG negative)

Answer 14

Virulence factor — Enterohemorrhagic E. coli (EHEC)

Question 15

Hemorrhagic colitis and hemolytic uremic syndrome

Answer 15

Disease — Enterohemorrhagic E. coli (EHEC)

Question 16

Associated with UTI and diarrheal disease.

Answer 16

Diffusely adherent E.coli (DAEC)

Question 17

Adhere to HEp2 in a aggregative “stacked-brick” pattern.

Answer 17

Enteroaggregative E.coli (EAEC)

Question 18

Produces watery diarrhea

Answer 18

Enteroaggregative E.coli (EAEC)

Question 19

Respiratory tract (pneumonia) ,wound, urinary tract, blood (septicemia) ,and CSF (Meningitis) infections.

Answer 19

Disease syndromes — Klebsiella (Friedlander’s bacilli) and Enterobacter

Question 20

May be encapsulated and appears as mucoid colonies that tend to “string”

Answer 20

Klebsiella (Friedlander’s bacilli) and Enterobacter

Question 21

Klebsiella is associated with?

Answer 21

plasmid-mediated ESBL’s

Question 22

Nosocomial and opportunistic pathogens causing bacteremia, septicemia, urinary tract, respiratory tract (pneumonias) and wound infections.

Answer 22

Virulence factor — Serratia and Citrobacter

Question 23

produces a red pigment (prodigiosin)

Answer 23

S. marcescens — Serratia and Citrobacter

Question 24

produces Lipase, Gelatinase and DNase.

Answer 24

S. marcescens — Serratia and Citrobacter

Question 25

ONPG Positive

Answer 25

Serratia and Citrobacter

Question 26

Opportunistic causing bacteremia, septicemia, urinary tract, respiratory tract and wound infection.

Answer 26

Virulence factor — Proteus, Morganella and Providencia

Question 27

Laboratory Diagnosis — Rapid urease producer

Answer 27

Proteus, Morganella and Providencia

Question 28

Laboratory Diagnosis — Phenylalanine deaminase positive

Answer 28

Proteus, Morganella and Providencia

Question 29

Laboratory Diagnosis — Proteus produces “Swarming motility” and has a “burnt chocolate odor”

Answer 29

Proteus, Morganella and Providencia