infection

Question 1

commonest cause of traveller’s diarrhoea

Answer 1

E.coli

Question 2

short incubation period and severe vomiting

Answer 2

s.aureus

Question 3

HIV seroconversion syndrome symptoms

Answer 3

fever
• generalised rash
• malaise
• sore throat, and
• generalised lymphadenopathy
ulceration in mouth or genitals
symptoms arise up to 2 weeks after getting HIV (unprotected sex/ needles) and the symptoms last one week

Question 4

DDx of a febrile illness with generalised rash and lymphadenopthy could include:

Answer 4

• HIV seroconversion
• secondary syphilis
• Epstein Barr virus (EBV)
• cytomegalovirus (CMV)
• acute toxoplasmosis
• acute hepatitis B
• rubella.6

Question 5

best first line test for diagnosis of suspected seroconversion illness

Answer 5

combined antigen/antibody assay