GI

Question 0

• Gastritis / Peptic Ulcer Disease (70% of cases)
• Duodenal Ulcer (100% of cases)
• Stomach Cancer

Answer 0

H pylori

Question 1

Esophagitis (3)

Answer 1

• CMV (-> linear ulcers)
• Candida (-> white pseudomemb)
• HSV-1 (-> “punched-out” ulcers. Immunocompromised p/ts.)

Question 2

Common GI Infection (4)

Answer 2

• Salmonella
• Shigella
• Campylobacter
• Yersinia

Question 3

Pediatric Diarrhea (2)

Answer 3

• C jejuni

- EPEC

Question 4

Bloody Diarrhea (7: 6 Bacteria + 1 Protozoa)

Answer 4

• Campylobacter
• EHEC + EIEC
• Salmonella
• Shigella (bacillary dysentery)
• Yersinia enterocolitica (pseudoappendicitis) Daycare
• Entamoeba histolytica (amebic dysentery + liver abscess)

Question 5

Watery Diarrhea (8: 4 Bacteria + 2 Viruses + 2 Protozoa)

Answer 5

• C difficile (also sometimes bloody) + C perfringens (also gas gangrene)
• ETEC (“Travelers’” diarrhea)
• V cholerae (“rice-water” diarrhea)
• Norovirus
• Rotavirus (esp in daycares / kindergartens)
• Cryptosporidium (in immunocompromised p/ts)
• Giardia

Question 6

Exotoxin-Mediated Food Poisoning (6, incl source)

Pres (S aureus + B cereus)?

Answer 6

• S aureus (PREFORMED HEAT-STABLE toxin: meat, mayonnaise / custard)
• B cereus (reheated rice)
• C botulinum (improper canning- “bulging”)
• C perfringens (reheated meat)
• EHEC 0157:H7 (undercooked meat)
• V cholerae (infected seafood)

PRES: Starts quickly and ends quickly

Question 7

Salmonella Food Poisoning (3 sources)

Answer 7

Meat, Poultry, Eggs

Question 8

V parahaemolyticus / vulnificus Food Poisoning (source)

Answer 8

Contaminated seafood

Question 9

Mesenteric Adenitis (3)

Pres (CLUE)?

Answer 9

• Salmonella (non-typhoidal)
• Yersinia enterocolitica
• C jejuni

PRES: Mimics Appendicitis

Question 10

Liver Hydatid Cysts

Answer 10

Echinococcus granulosus (cestode/tapeworm)

Question 11

Portal Htn

Answer 11

Schistosoma (trematode/fluke)

Question 12

Reye’s Sx (2)

Answer 12

• Influenza B
• VZV

Likely related to MITOCH damage of hepatocytes.

Question 13

HCC

Answer 13

Aflatoxin from Aspergillus

Question 14

Acute Pancreatitis

Answer 14

Scorpion sting

Question 15

Biliary Tract Infection

Answer 15

Enterococci (Group D Strep)

Question 16

Biliary Tract Dz + Cholangiocarcinoma

Answer 16

Clonorchis sinensis (trematode/fluke)

Question 17

Classic Galactosemia

Answer 17

E coli sepsis (Neonates)

Question 18

Perianal Pruritus

Answer 18

Enterobius (nematode/roundworm)

Question 20

Fitz-Hugh-Curtis Sx (2)

Answer 20

• Chlamydia trachomatis

- Neisseria gonorrhoeae