Seventy-five infected as cases rise in US E coli outbreak linked to McDonald’s

Update by Food and Drug Administration signals escalation in food poisoning outbreak affecting US west and midwest

• What is E Coli and how can you avoid getting it?

The US Food and Drug Administration said on Friday that 75 people had now been infected by the E coli outbreak linked to McDonald's quarter pounder hamburgers, as the number sickened by the bacterial illness continues to increase.

And the Centers for Disease Control and Prevention (CDC) warned on Friday: The true number of sick people in this outbreak is likely much higher than the number reported, and the outbreak may not be limited to the states with known illnesses."