Since 1995, more than 20 outbreaks stemming from the deadly E.Coli O157-H7 toxin have originated in California, contaminating leafy green crops, most recently, spinach.

• 自1995年以来，致命的E大肠杆菌O157-H7病毒在加利福利亚已爆发了20多次，污染了许多绿叶作物，最近一次受污染的是菠菜。