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Serology in ocular toxoplasmosis
The British Journal of Ophthalmology
|August 1, 1986
Summary
Diagnosing ocular toxoplasmosis using serology remains challenging. While the ELISA technique shows promise, further research is needed to confirm its superiority over the dye test for accurate diagnosis.
Area of Science:
- Ophthalmology
- Infectious Diseases
- Immunology
Background:
- Ocular toxoplasmosis is a significant cause of uveitis.
- Accurate serological diagnosis is crucial for effective management.
Purpose of the Study:
- To evaluate the diagnostic utility of toxoplasma serology in patients with ocular disease.
- To compare the efficacy of the dye test and ELISA in diagnosing ocular toxoplasmosis.
Main Methods:
- Patient groups included uveitis of various causes, posterior/panuveitis, congenital/ocular toxoplasmosis, and controls.
- Serological tests (dye test, ELISA) were employed to detect IgG antibodies and immune complexes.
Main Results:
- Dye test titres showed no correlation with ocular toxoplasmosis diagnosis in uveitis cohorts.
- ELISA detected IgG antibodies in 100% of clinical ocular toxoplasmosis cases versus 58% in controls.
- Circulating immune complexes were found in a higher percentage of toxoplasmosis patients than controls.
Conclusions:
- Serological testing alone is currently insufficient for definitive diagnosis or exclusion of ocular toxoplasmosis.
- The ELISA test may offer superior diagnostic value compared to the dye test, warranting further investigation.