"Over a three-month period in 2022, she experienced forgetfulness and worsening depression. An MRI showed that she had a brain lesion and, in June 2022, doctors performed a biopsy.

"Inside the lesion, doctors found a “stringlike structure” and removed it. The structure was a red, live parasitic worm, about 3.15 inches long and .04 inches in diameter."

https://www.nytimes.com/2023/08/29/science/live-brain-worm-australia.html