The enterics

Question 1

shiga-like toxin

i. bacteria
ii. mechanism
iii. symptoms

Answer 1

i. EHEC (138)
ii. ADP ribosylation of 60s ribosome
iii. blood diarrhea, abdominal cramping
m74

Question 2

traveler’s diarrhea

Answer 2

ETEC

138

Question 3

Two toxins released by ETEC?

symptoms?

Answer 3

heat labile (cAMP)
heat stable (cGMP)
watery diarrhea; traveler’s diarrhea
138

Question 4

anemia, thrombocytopenia, renal failure, caused by infected hamburger meat; bloody diarrhea

Answer 4

E coli O157:H7
EHEC
138, m74

Question 5

invasive bacteria causing blood diarrhea, fever; similar to shigellosis

Answer 5

EIEC

138

Question 6

gram neg, comma / s shaped, oxidase positive, grows at 42 C
blood diarrhea in children
i. bacteria
ii. how does it spread
iii. resevoir

Answer 6

campylobacter jejuni
ii. fecal-oral transmission
iii. ingestion of meat, unpasteurized milk
138, m 80

Question 7

gram neg, comma / s shaped, oxidase positive, grows in alkaline media
endemic to developing countries
rice water diarrhea
i. bacteria
ii. mechanism of diarrhea

Answer 7

i. vibrio cholerae
ii. cholera toxin which activates Gs permanantly (increases cAMP)
139, 124, m 80

Question 8

poor sewage in developing countries causing watery diarrhea

i. bacteria
ii. toxin produced

Answer 8

i. vibrio cholerae
ii. cholera toxin
139, 124, m 80

Question 9

MCC of duodenal ulcers

i. bacteria
ii. also cause other findings

Answer 9

i. H. pylori

ii. second leading cause of gastric ulcers, behind ASA

Question 10

H pylori

i. stain and shape
ii. other characteristics

Answer 10

i. g neg rod
ii. catalase, oxidase, urease +
140, m81

Question 11

aspiration PNA - lobar - in alcoholic or diabetic

Answer 11

klebsiella pneumonia

138, m75

Question 12

red currant jelly

Answer 12

klebsiella

138

Question 13

gram neg rod, fast lactose fermenter, nosocomial UTI in urinary cath

Answer 13

e. coli and klebsiella

Question 14

nosocomial UTI with bright red pigment

Gram neg, oxidase+, slow lactose fermenter

Answer 14

serratia

174, m76

Question 15

gram neg rod, non lactose fermenter, produces H2S
can cause typhus fever
i. bacteria
ii. important virulence factor

Answer 15

salmonella typhi
ii. Vi antigen
139, m76

Question 16

Salmonella contraction

Answer 16

eating chicken and uncooked eggs

Question 17

1-3 weeks after expsure: fever, headache, abdominal pain, diarrhea, rose spots on abdomen
i. bacteria

Answer 17

Salmonella typhi

Question 18

fever, headache, abdominal pain, rose spots on abdomen

i. bacteria
ii. where can this bacteria colonize?

Answer 18

Salmonella typhi
ii. gallbladder (carrier state)
139, 78

Question 19

sickle cell anemia with bone pain, elevated ERS, radiograph showing bone swelling

Answer 19

Salmonella osteomyelitis

173

Question 20

what infections are more common in asplenic patients

Answer 20

SHiNE SKiS

122

Question 21

gram neg rod, non lactose fermenter, oxidase neg
blood diarrhea
i. bacteria if has flagella
ii. bacteria if does not have flagella

Answer 21

i. salmonella
ii. shigella
139

Question 22

struvite stones, nosocomial UTI with urinary catheter, urease positive, swarming on agar plate
i. bacteria

Answer 22

Proteus mirabilis
gram neg 135
stones 544
UTI 174, 178

Question 23

fever, abdominal pain, diarrhea with flecks of bright red blood and pus
gram neg, lactose non fermenter, does not grow H2S on agar
i. bacteria
ii. toxin

Answer 23

i. shigella
ii. shiga toxin - inactivates 60s ribosome
this bacteria invades cells
124, 139, m 76

Question 24

rice water diarrhea

Answer 24

Vibrio cholerae

139

Question 25

fever, acute diarrhea, pain over right lower quadrant

i. bacteria
ii. transmission

Answer 25

i. Yersinia enterocolitica
ii. pet feces, contaminated milk
exam reveals terminal ileitis
139, m79

Question 26

mechanism of cholera toxin

Answer 26

124, m80

vibrio cholerae 139

Question 27

daycare outbreak, pseudoappendicitis, blood diarrhea

Answer 27

Yersinia entercolitica

139, 172

Question 28

fever, rose-colored papules on abdomen, constipation, abd pain

Answer 28

typhoid fever

139

Question 29

lower extremity wekness after GI upset (2-3 weeks later)

Answer 29

guillain barre after campylobacter jejuni

488, 627, 138