Etiology, Pathogenesis, and TransmissionĪs noted above, cysticercosis is caused by the cestode Taenia solium. It is very uncommon for the optic nerve to be involved. It is hypothesized that the parasite travels to the posterior segment via the short ciliary arteries. Inferotemporal subretinal cysts are the most common in the posterior segment. Within the posterior segment, cysts can occur in the retinal, subretinal, or vitreal space. The route of entry of the cyst into the anterior chamber is debated, but one theory is that it enters via the anterior chamber angle. The cyst may reach the subconjunctival space from the adjacent muscles.Īnterior segment cysticercosis is very rare. When the extraocular muscles are involved, the superior rectus is the most common. Kruger-Leite et al reported that 35% of the cysts were found in the subretinal space, 22% in the vitreous, 22% in the subconjunctival space, 5% in the anterior segment, and only 1% in the orbit. Although OCC is less common in the Western world, the posterior segment of the eye is one of the most common sites of infection. The ocular adnexa have been noted to be the most common site of disease in India. OOC can result in a number of manifestations depending on the location of the cysts. The disease affects thousands of people in developing nations. solium that causes OOC is Cysticercus cellulosae. Orbital/ocular cysticercosis (OOC) is a preventable cause of blindness. In addition to NCC, ocular or orbital cysticercosis can also occur. In fact, NCC is the leading cause of adult onset epilepsy in the world. When it affects the central nervous system, it is called neurocysticercosis (NCC) and often leads to seizures and epilepsy. Other parasites causing Taeniasis in human includes Taenia saginata and Taenia asiatica, though Taenia solium is the major cause of human disease.Ĭysticercosis affects various parts of the body. DiseaseĬysticercosis is a parasitic infection caused by the larval form of the cestode, Taenia solium (T. From Video "The Great Migration – Subretinal Cysticercosis" By Jay Chhablani, MBBS 3rd Annual Global Video Contest at AAO website Mar 22, 2017.
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