August 19/Atlanta/CNN.com -- Hundreds of Americans have likely become ill from tainted eggs, according to estimates from the Centers for Disease Control and Prevention (CDC), CDC spokeswoman Lola Russell said.

The FDA, which investigates food contamination, said the CDC received reports of approximately 200 salmonella cases every week during late June and early July. Normally, the CDC has received an average of some 50 reports of salmonella illness each week for the past five years. Many states have also reported increases of this pattern since May 2010, the FDA said.