Worm invades man’s eyeball, leading doctors to suck out his eye jelly

A 35-year-old man in India faced persistent discomfort in his left eye for eight months, characterized by redness and blurred vision. Upon visiting an ophthalmology clinic, doctors quickly identified the cause of his distress. According to a case report published in the New England Journal of Medicine, the man's eye was found to be bloodshot and inflamed, with a dilated and fixed pupil. His vision in that eye measured at 20/80. A thorough examination revealed the unexpected culprit: a small worm moving sluggishly within the vitreous cavity of his eye. To remove this parasitic invader, the medical team performed a pars plana vitrectomy, a surgical procedure typically used to treat various eye conditions. This particular case, however, was unique due to the rare nature of removing a worm. The surgeons made tiny incisions in the sclera, the white outer layer of the eye, and utilized a suction device to extract the jelly-like vitreous humor. Remarkably, this technique was able to pull out a portion of the worm's tail, which remained wriggling during the procedure. Upon microscopic examination, the worm was identified as Gnathostoma spinigerum, a known parasite that can invade human eyes. This species is commonly found in India, typically infecting carnivorous mammals such as domestic cats and dogs. In these primary hosts, adult worms create tumor-like formations in the intestines, where they reproduce and release eggs. These eggs are excreted in the animals' feces, potentially contaminating freshwater sources. Intermediate hosts, including fish and amphibians, may ingest the larvae, continuing the cycle, while birds and snakes can act as dead-end hosts for the parasites. This unusual medical case highlights the complexities of parasitic infections and the challenges they pose to human health.