The Big Five
Passes from a previous infected person (80% of time) or in foods such as salads, raw vegetables, milk/dairy, and poultry (20% of time).
Preventions: Always wash hands, when changing diapers dispose of them carefully, maintain proper levels of chlorine in pool, practice food safety, when traveling drink only bottled water.
Enterohemorrhagic and shiga toxin-producing E. coli
Prevention: Wash hands, Cook thoroughly, Avoid raw milk, Avoid swallowing water in lakes, pools, etc, and prevent cross contamination.