OCT 20, 2010
Toxoplasma gondii is an ubiquitous, obligate intracellular protozoan and is considered to be the most common cause of infective retinitis in immunocompetent humans. The course of systemic disease in immunocompetent adults is usually asymptomatic and self-limiting. As soon as infection has occurred, the parasite forms latent cysts in many organs, including the retina. These cysts can reactivate years after the initial infection, giving rise to acute retinochoroiditis and, subsequently, the formation of new retinochoroidal lesions.1 Usually, ocular toxoplasmosis (OT) is clinically diagnosed through recognition of focal retinitis or retinochoroiditis in the setting of an adjacent or nearby retinochoroidal scar.