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[Toxoplasmosis encephalitis in patients with AIDS]
Abstract:
Toxoplasmosis encephalitis developed in three male homosexuals with AIDS. Clinical symptoms of encephalitis began with a nonspecific organic mental syndrome. In two cases there developed late focal symptoms. There were light to moderately severe generalized EEG changes with additional focal signs. CSF findings and toxoplasmosis titres were not diagnostically altered. Computed tomography demonstrated multiple areas of decreased density in cortex and cerebellum. Administration of pyrimethamine and sulfamethoxydiazine to the three patients brought about clinical improvement within a few days and regression of abnormal CT changes within a few weeks of onset of treatment. One patient died after an encephalitis recurrence: autopsy demonstrated toxoplasma pseudocysts in immediate proximity to small necrotic foci in the brain. The possibility of toxoplasma encephalitis should be considered in AIDS patients who develop an organic mental syndrome. Often the diagnosis can only be made after response to a trial of toxoplasmosis treatment.
Insights
Toxoplasmosis encephalitis is a serious concern for individuals with acquired immunodeficiency syndrome (AIDS). Early diagnosis and treatment with pyrimethamine and sulfamethoxydiazine can lead to clinical improvement and regression of brain lesions.
Area of Science:
- Neurology
- Infectious Diseases
- Immunology
Background:
- Acquired immunodeficiency syndrome (AIDS) is associated with opportunistic infections affecting the central nervous system.
- Toxoplasmosis encephalitis is a significant opportunistic infection in AIDS patients, presenting with diverse neurological symptoms.
Purpose of the Study:
- To describe the clinical presentation, diagnostic findings, and treatment outcomes of toxoplasmosis encephalitis in three male homosexuals with AIDS.
- To highlight the importance of considering toxoplasmosis encephalitis in the differential diagnosis of organic mental syndromes in AIDS patients.
Main Methods:
- Case series involving three male homosexual patients diagnosed with AIDS and suspected toxoplasmosis encephalitis.
- Clinical evaluation, electroencephalography (EEG), cerebrospinal fluid (CSF) analysis, and computed tomography (CT) scans were performed.
- Treatment administered included pyrimethamine and sulfamethoxydiazine.
Main Results:
- Patients presented with organic mental syndrome, with two developing focal neurological signs.
- EEG showed generalized changes with focal signs; CSF findings and toxoplasmosis titres were not diagnostic.
- CT scans revealed multiple hypodense lesions in the cortex and cerebellum.
- Treatment led to rapid clinical improvement and CT lesion regression within weeks.
- One patient experienced a recurrence and died; autopsy confirmed toxoplasma pseudocysts.
Conclusions:
- Toxoplasmosis encephalitis should be strongly considered in AIDS patients presenting with an organic mental syndrome.
- Diagnosis may rely on response to a therapeutic trial of antiparasitic treatment, as conventional diagnostic methods can be inconclusive.
- Prompt treatment with pyrimethamine and sulfamethoxydiazine is effective in managing toxoplasmosis encephalitis in AIDS patients.