28th July 2023

A 4 year old boy with sickle cell disease is admitted with fever and right hip pain.

A 4 year old boy with sickle cell disease is admitted with fever and right hip pain. An MRI confirms septic arthritis and blood cultures grow a Gram negative bacilli.

What is the most likely causative pathogen?

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