Lynne Terry of the Portland Oregonian reports that lab tests confirmed today what Oregon health officials suspected: Raw milk from Foundation Farm near Wilsonville was contaminated with a deadly strain of E. coli.

The tests found E. coli O157:H7 in the milk, manure and the cows themselves, said Christine Stone, spokeswoman for Oregon Public Health.

At least 18 people are ill, including four children who’ve been hospitalized. All four of them are on kidney support – they developed hemolytic uremic syndrome.

Stone said multiple samples from Foundation Farm, including manure, swabs from two of the cow’s rectums, and leftover milk tested positive for E. coli O157:H7, one of the deadliest foodborne pathogens.