B58.0

Clinical Causes: Infection with the parasite Toxoplasma gondii, which can be contracted through contaminated food or water. Exposure to infected cat feces, as cats are primary hosts for Toxoplasma gondii. Consuming undercooked or raw meats that contain the parasite's cysts. Transmission from mother to fetus during pregnancy, leading to congenital infection. Reactivation of latent infection in immunocompromised individuals, such as those with HIV/AIDS or on immunosuppressive therapies.

Key Symptoms: Blurred or decreased vision in one or both eyes. Floaters—small spots or threads drifting in the visual field. Eye redness and tearing. Eye pain or discomfort. Sensitivity to light (photophobia). Visual disturbances such as shadows or floaters indicating retinal inflammation. In some cases, no noticeable symptoms until significant damage occurs.

Diagnosis Path: Visual acuity tests to assess clarity of vision. Fundoscopy (retinal examination) to observe characteristic lesions and inflammation. Serologic blood tests to detect antibodies against Toxoplasma gondii. Optical coherence tomography (OCT) imaging to evaluate retinal structures. Fluorescein angiography to identify areas of retinal inflammation or necrosis.

Treatment Protocols: Antiparasitic medications such as pyrimethamine combined with sulfadiazine or clindamycin. Corticosteroids to reduce ocular inflammation, often used alongside antiparasitic agents. Regular monitoring of eye health through follow-up examinations. In cases of severe or recurrent infections, longer courses of medication or additional interventions might be necessary. Managing underlying immunosuppression if applicable, to prevent reactivation.