From MercuryNews.com.

The California Department of Public Health is investigating after two babies contracted salmonella poisoning while at a Stanislaus County hospital, county officials said Wednesday.

The first infant salmonella case at Doctors Medical Center in Modesto was reported on April 19, and the second case on May 30, according to Stanislaus County Public Health Director John Walker.

State investigators determined that infant formula in the Neonatal Intensive Unit was not the source of the poisoning, Walker said.