Answer:
The answer is C. Mycobacterium.
Step-by-step explanation:
According to the symptoms the male demonstrates in the question, the primary organism causing these should be Mycobacterium because it is a bacteria that is associated with causing diseases such as Tuberculosis and Leprosy.
The symptoms of Tuberculosis include most of the listed ones which are fever, weakness and weight loss.
The diagnosis of endogenous osteomyelitis also indicates that the back pain is caused by the tuberculosis as well, Tuberculous Osteomyelitis to be exact which is also defined as Skeletal Tuberculosis.
I hope this answer helps.