An outbreak of E. coli infections has spread to three additional states: Pennsylvania, Illinois and Maryland.

The Mexican restaurant chain has hired IEH Laboratories and Consulting Group of Seattle, WA to help improve its food safety system.

A California company has issued a recall for its vegetable mix officials identified as the source of E. coli in Costco’s rotisserie chicken salad.

To date, the outbreaks have infected people in nine states.

According to CDC, new cases were found in Ohio, New York and California.

The increase sparks a call for better collaboration between the food industry and federal and state governments.

On Wednesday, Chipotle Mexican Grill reopened all 43 restaurants in the Seattle, WA and Portland, OR markets.

Chipotle Mexican Grill has closed 43 stores in the Pacific Northwest in response to an E. coli outbreak.

Omaha, Nebraska-based All American Meats, Inc. has issued a recall for approximately 167,427 pounds of ground beef products that may be contaminated with E. coli O157:H7, according to USDA’s Food Safety and Inspection Service (FSIS).

Many chemical bactericidal washes and rinses have been tried in the poultry processing industry with varying results; Campylobacter and Salmonella still find their way to finished product.