A recall by one of the nation's largest egg producers has been expanded from 228 million eggs to 380 million.
The Centers for Disease Control and Prevention is working with other health officials to investigate the salmonella poisoning outbreak that has been linked to eggs in at least three states.
According the CDC, eggs from Wright County Egg in Galt, Iowa, were linked to illnesses in Colorado, California, and Minnesota.
"We are undertaking this additional recall to further protect the safety of consumers - this voluntary measure is consistent with our commitment to egg safety, and it is our responsibility," Wright County Egg officials said in a statement Wednesday evening.
The contaminated eggs were packaged between May 16 and Aug. 13 and were shipped around the country packaged under the names Lucerne, Albertson, Mountain Dairy, Ralph's, Boomsma's, Sunshine, Hillandale, Trafficanda, Farm Fresh, Shoreland, Lund, Dutch Farms, and Kemp.
Those with eggs under these brands have been advised not to consume them.
The Food and Drug Administration is "on-site to review records and inspect our barns," Wright County Egg officials said.
Common symptoms of salmonella include diarrhea, abdominal cramps, and fever within eight to 72 hours of eating a contaminated product.
For more on salmonella poisoning, visit the Centers for Disease Control Web site.
For more egg safety information, click here.