About two dozen lab tests done so far show that samples from infected people and other sources, such food from their homes, have shiga toxin present. Shiga toxin is a byproduct from E. coli and generally indicates the pathogen is present. Specific tests for E. coli take several days in the lab before conclusive results are available. Tests are being conducted at the Missouri State Health Department laboratory.
St. Louis E. coli outbreak remains a mystery
11/01/2011 12:30:00 PM