Infection

Question 0

Non bloody diarrhoea

Answer 0

Campylobacter (most common cause of food poisoning in developed countries)
Shigella
E. Coli (most common cause of travellers diarrhoea)
Vibrio parachaemia lycticus (shellfish)

Question 1

Dengue fever

Answer 1

Short incubation time - symptoms appear quickly 3-4 days, can be asymptomatic
Bone pain, malaise, retro-orbital pain, sudden onset fever, headache
Hepatomegaly, lymphadenopathy
Causes dengue haemorrhagic fever: petechial rash, GI pain, nosebleeds, feeling faint
Leads to dengue shock syndrome
Ix: ELISA
Tx: conservative tx

Question 2

Bloody diarrhoea

Answer 2

Giardia (poisoned streams)
Cryptosporidium (HIV) 
C. Perfringens
B. Cereus (reheated rice)
Cholera

Question 3

C. Difficile

Answer 3

Stool toxin
Metronidazole (can’t drink)
Then vancomycin if metronidazole is contraindicated