Final answer:
c) Vertebral osteomyelitis; neurosurgical consultation
The diagnosis is Vertebral osteomyelitis. The next step would be neurosurgical consultation.
Step-by-step explanation:
The diagnosis for the patient in this case is Vertebral osteomyelitis. The patient exhibits symptoms such as fever, back pain, elevated ESR & CRP, and imaging showing vertebral body destruction with disk-space narrowing. The blood culture revealing gram-positive cocci in clusters further supports the diagnosis. The next step would be neurosurgical consultation to evaluate the extent of the infection and determine the appropriate treatment plan.