Health authorities have issued the highest risk level to millions of eggs recalled due to potentially containing salmonella.

Last month, California-based August Egg Company recalled 1.7million cartons of brown cage-free and certified organic eggs after they sickened 79 Americans in seven states.

On Thursday, the FDA gave the recall a Class I designation, its most dangerous classification.

This means ‘there is a reasonable probability that the use of or exposure to a violative product will cause serious adverse health consequences or death.’

The eggs were sold between February 29 and May 17 in California, Washington, Illinois, Indiana, Nevada, Arizona, Nebraska, Kentucky and New Mexico. Illnesses were reported in all states except Illinois and Indiana.

But officials fear that some of the affected cartons could still be lurking in refrigerators, putting others at risk.

There have been no reported deaths, but 21 people were hospitalized from salmonella, a deadly bacteria that strikes 1.3million Americans and kills 420 a year.

A total of 29 branded egg packages were included in the recall, including brands like Raleys, Simple Truth and Sun Harvest. Scroll down to see the full list.