ETIOLOGY, CLINICAL COURSE, AND MODERN TREATMENT STRATEGIES OF BACTERIAL MENINGITIS
Abstract
Bacterial meningitis is a life-threatening infectious disease characterized by inflammation of the meninges, the protective membranes surrounding the brain and spinal cord. Despite advances in antimicrobial therapy and preventive measures, bacterial meningitis remains a significant cause of morbidity and mortality worldwide, particularly among neonates, children, and elderly individuals. The disease is most commonly caused by pathogenic bacteria such as Neisseria meningitidis, Streptococcus pneumoniae, and Haemophilus influenzae, although other organisms may be involved depending on age, immune status, and geographic region. The pathogenesis of bacterial meningitis involves bacterial invasion of the bloodstream, penetration of the blood–brain barrier, and subsequent inflammatory response within the central nervous system. This inflammatory cascade leads to increased intracranial pressure, cerebral edema, and neuronal injury, which are responsible for the severe clinical manifestations and potential long-term complications. Clinically, bacterial meningitits often presents with acute onset of fever, headache, neck stiffness, and altered mental status. In severe cases, seizures, septic shock, and coma may develop rapidly. Early diagnosis and prompt initiation of appropriate antimicrobial therapy are critical determinants of patient outcome. Modern diagnostic approaches include cerebrospinal fluid analysis, blood cultures, and advanced molecular techniques such as polymerase chain reaction (PCR). Treatment strategies emphasize early empirical antibiotic therapy, followed by targeted treatment based on microbiological findings. Adjunctive therapies, including corticosteroids and supportive intensive care, play an essential role in reducing complications and improving survival. This article aims to provide a comprehensive overview of bacterial meningitis, focusing on its etiological agents, clinical progression, and contemporary treatment strategies. By reviewing current scientific evidence, this paper highlights the importance of early recognition, rapid intervention, and multidisciplinary management in reducing the global burden of bacterial meningitis.