1.   Children pick up the eggs from contaminated food or pets, and the worms hatch out at night.

2.   Humans can be affected by pesticides through breathing in spray, brushing against treated plants and eating contaminated food.

3.   If you eat some contaminated food, you will not necessarily feel the ill-effects immediately.

4.   The infection was traced to contaminated food.

5.   The other three in four cases are caused by contaminated food, such as rotten meat.

6.   The virus is mainly spread through contaminated food.

7.   The virus is spread through contact with contaminated food and water.

8.   There have been a lot of stories in the papers recently about contaminated food.

9.   There is a strong possibility that the cat contracted the condition by eating contaminated pet food.