Mortality from tuberculous meningitis reduced by steroid therapy

In this study of 99 tuberculous meningitis patients from Cali, Colombia, treatment with steroids (in conjunction with antituberculous drugs) was shown to be more effective in reducing mortality than treatment with antibacterial drugs alone. Results further suggest that low dosages of steroids (1 mg/kg of prednisone daily for r 30 days) are equally effective in treating the disease as high dosages (10 mg/kg of prednisone at the start of treatment, gradually reduced over a 30-day period). These results are band 4(-43 and -kk mg/100 ml) demonstrated cerebral release. Arterial blood hyperammonemia can be detoxified safely in the brain as long as the levels do not exceed approximately 300 mug/100 ml. Beyond that level lactic acidosis is observed, particularly in cerebral venous drainage. Arterial blood hyperammonemia was also related to the extent of alveolar hyperventilation. These findings are very similar to those seen in experimental hyperammonemia and support the concept that neurotoxicity in children with Reye's syndrome is at least partly due to impaired oxidative metabolism secondary to hyperammonemia.