Soft cheeses, frozen breakfast foods, smoked salmon and other products have been recalled for potential listeria contaminations in the last month.

An infant in California died in a listeria outbreak that has now prompted a recall of ready-to-eat meat, the Centers for Disease Control and Prevention (CDC) said.The child's pregnant mother also fell ill with listeria.

A woman who was pregnant with twins was sickened and both infants died, the CDC said, but listeria was only found in a sample from one of the infants.