Neurosurgeon investigating patient's mystery symptoms plucks a worm from woman's brain in Australia

A neurosurgeon in Australia discovered a live worm, measuring 8 centimeters, in a woman's brain during a biopsy. The worm was identified as the larva of an Australian native roundworm not previously known to be a human parasite. The woman had been experiencing symptoms of forgetfulness and depression for three months before the discovery.