Toxoplasmic encephalitis in acquired immunodeficiency syndrome

Area of Science:

• Infectious Diseases
• Neurology
• Immunology

Background:

• Toxoplasmic encephalitis (TE) is a frequent opportunistic central nervous system infection in individuals with acquired immunodeficiency syndrome (AIDS).
• Neurological abnormalities are common in advanced HIV infection, necessitating accurate diagnosis and effective treatment.

Purpose of the Study:

• To investigate the clinical presentation, diagnostic findings, and treatment outcomes of toxoplasmic encephalitis in patients with AIDS.
• To evaluate the efficacy of a combination therapy for TE in this patient population.

Main Methods:

• Retrospective analysis of 11 patients with HIV and neurological symptoms suggestive of TE.
• Treatment with a combination of trimethoprim/sulfamethoxazole and pyrimethamine.
• Assessment of treatment response through clinical evaluation and neuroimaging (CT/MRI) after three weeks.

Main Results:

• Common symptoms included fever, seizures, headache, and altered sensorium, with focal neurological deficits in 80%.
• Characteristic ring-enhancing lesions were observed on CT/MRI scans.
• Ten out of eleven patients showed clinical and radiological improvement within 10 days of treatment; one patient died early.

Conclusions:

• Toxoplasmic encephalitis is a significant opportunistic infection in AIDS patients, often presenting with focal neurological deficits and characteristic imaging findings.
• Empirical treatment with trimethoprim/sulfamethoxazole and pyrimethamine is effective in confirming the diagnosis and managing TE.
• Lifelong prophylactic therapy is crucial to prevent relapses of this potentially fatal but treatable condition.