About 30 people who attended a party in Vernon County, Wisconsin, in August were later sickened by Salmonella poisoning, and eggs are suspected in the outbreak.

But the director of the Vernon County Health Department told the Lacrosse Tribune that the illnesses were not related to the recent massive recall of eggs from Wright County Egg and Hillandale Farms in Iowa.

Salmonella is one of the most common causes of foodborne illness in the United States and eggs are among the leading sources of infection.  In a study published in 2005, the Centers for Disease Control and Prevention estimated that five years earlier, contaminated eggs had been responsible for about 182,000 cases of Salmonella.

In the Wisconsin outbreak, those sickened were treated at Vernon Memorial Healthcare.  The Wisconsin Lab of Hygiene confirmed this week that they all had Salmonella.