Meningitis is inflammation of the protective membranes covering the brain and spinal cord, most often caused by bacterial, viral, or fungal infections. Common bacterial causes include Neisseria meningitidis and Streptococcus pneumoniae, while viral meningitis may result from enteroviruses. Risk factors include weakened immunity, close living conditions, and lack of vaccination. Symptoms typically develop rapidly and include high fever, severe headache, neck stiffness, nausea, vomiting, light sensitivity, confusion, and sometimes seizures. Bacterial meningitis is a medical emergency requiring prompt treatment with intravenous antibiotics such as ceftriaxone. In pharmaceutical supply discussions, ceftriaxone injection wholesale availability is critical for hospitals managing acute cases.