Woman Pulls 14 Wiggly Worms From Her Eye!!

A 26-year-old Oregon woman has received the undesirable title of the first human to have tiny parasitic worms previously only ever seen in cattle squirming around in her eyeball. CDC experts suspect she just didn't swat a fly away fast enough.

Infectious disease experts reported that the woman had a total of 14 of the wriggling parasites pulled from her left eyeball after she experienced eye irritation. This happened in August 2016, although the experts only published their paper on Monday, February 12. The woman pulled most of the worms out herself over a 20-day period, despite visiting several doctors. The translucent worms were less than a half-inch long. Since then, she’s made a full recovery, with no more irritation or any evidence of additional worms.

The worms live in between the eyeball and the eyelid and tend to cause mild inflammation and an irritating sensation of having something in your eye. Occasionally, they can try to swim across the eyeball and cause corneal scarring and blindness.

They move from eye to eye by hitching a ride in face flies that drink tears, typically in the Musca genera of flies. Worm larvae in tears get sucked into the fly’s intestines, where they grow and go through two molts. When they’re ready, they move up to the fly’s mouthparts and await eyeball delivery.

CDC experts suspect that the Oregon woman picked up the infection while horse riding or fishing in Oregon over the summer. The flies and parasites are known to pester cattle in the region. And the CDC experts suspect that she may have simply delayed swatting away a face fly while she was focused on her summer activities.

Experts have found that two other eyeball worms related to Thelazia gulosa (T. californiensis and T. callipaeda) can infect humans. They’re rarely seen in humans in the US, but all of the infections have been reported in summer months, too.

American Journal of Tropical Medicine and Hygiene, 2018. DOI: 10.4269/ajtmh.17-0870 (About DOIs).

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