<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I am suffering from gas gangrene, what medical tests do I need to undergo?  <response>: You need to undergo a CT scan of the abdomen to determine the extent of infection. Additionally, you require procedures on the spleen, such as spleen operation, as well as a bone marrow transplant BMT to replace the infected bone marrow. 