The same analysis also showed that the Viking was plagued by whipworm and maw-worm eggs, common intestinal parasites. The Shambles — an old street in York, one of the most historic cities in Europe.

“The trial is a novel approach [to autism treatment] with a naturally occurring drug delivery system”—a parasitic worm, said Eric Hollander, a Montefiore psychiatrist and head scientist on the trial.

Susan E. Little, DVM, PhD, DACVM, discusses what diagnostic tests should be used for tapeworms, hookworms, and roundworms in ...