Gone, Git, or Scat
Earlier poster cited raccoons carrying "Baylisascaris procyonis"
"...In North America, B. procyonis infection rates in raccoons are very high, being found in around 70% of adult raccoons and 90% of juvenile raccoons... Eggs are produced by the worm while in the intestine, and the released eggs will mature to an infective state externally in the soil.
"...Human infection of B. procyonis has been relatively rare, with about 13 cases reported since 1980. However, disease caused by this parasite can be extremely dangerous, causing death or severe symptoms. Reported disease has primarily afflicted children and almost all cases were a result of the ingestion of contaminated soil or feces... Out of the 13 cases, 5 were fatal and the remaining victims were left with severe neurological damage. Even with treatment, prognosis is poor... Animal studies have shown that treatment is more favorable before the larvae have migrated to the brain; however, migration to the brain was shown to occur only 3 days after ingestion, leaving a very small window of opportunity.
It is possible that human infection is more common than diagnosed and most cases do not reach a clinical stage.
"...has become a concern for its potential use as an agent of bioterrorism. The fact that this parasite's eggs are easy to acquire, able to live for years, extremely resistant to many disinfectants and heat, and cause serious infections in humans with poor treatment options could make it a dangerous weapon..."
This all came from Wikipedia - YMMV