The total number of confirmed E. coli cases connected to the St. Louis area outbreak has reached 28, according to a news release from The Missouri Department of Health and Senior Services (DHSS).

The DHSS stated 55 food samples connected to the outbreak have been tested so far. However, none of those samples have tested positive for the bacteria.

DHSS Spokesperson Jacqueline Lapine tells Patch this is a very "fluid" situation, and reminds people the investigation is ongoing and information will continue to change as the investigation continues.

Lapine said health officials have not yet found a source, and she is not sure when or if a source will be determined.

Check back to Patch for updates.

Previously published articles include:

E coli Outbreak Occurs in St. Louis County

Schnucks' Salad Bars Focus of E. coli Outbreak, But Testing Negative