18th February 2024

A 23-year-old male presents to the hospital with facial swelling and difficulty breathing

A 23-year-old male presents to the hospital with facial swelling and difficulty breathing. He was out walking in the garden and was stung by a bee. His symptoms began reasonably quickly after being stung. His airway was protected, and he remained haemodynamically stable. His skin was covered in non-blanching wheals along his arms and legs. His facial swelling resulted in difficulty in opening his eyes. He denies any previous allergies.

Which of the following immune system components is responsible for the pathogenesis of this condition?

Select the SINGLE most appropriate option from the list below. Select ONE option only.