16th February 2024

A 12-year-old child has recurrent admission to the hospital with meningitis despite adequate antimicrobial treatment

A 12-year-old child has recurrent admission to the hospital with meningitis despite adequate antimicrobial treatment. Blood cultures have grown Neisseria meningitidis on each occasion. A complement deficiency is suspected.

Which complement level is likely deficient?

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