Passmedicine/Pastest

Question 1

cause of lyme disease

Answer 1

Borrelia burgdorferi

Question 2

transmission of lyme disease

Answer 2

ixodes ticks in north america

Question 3

skin rash seen in mycoplasma

Answer 3

erythema multiform

Question 4

erythema migrans

Answer 4

seen after a tick bite if infected with borrelia in 50-70 percent of pts

Question 5

cause of typhoid

Answer 5

salmonella typhi

Question 6

symptoms of typoid

Answer 6

initially systemic upset as above
relative bradycardia
abdominal pain, distension
constipation: although Salmonella is a recognised cause of diarrhoea, constipation is more common in typhoid
rose spots: present on the trunk in 40% of patients, and are more common in paratyphoid

Question 7

complications of typhoid

Answer 7

osteomyelitis (especially in sickle cell disease where Salmonella is one of the most common pathogens)
GI bleed/perforation
meningitis
cholecystitis
chronic carriage (1%, more likely if adult females)