A young boy in a field plays with a spring lamb at Drusillas Park Zoo. Hugging the animal tight in his arms, the lad enjoys the feel of its wool and its natural smell. Educating the young with hands-on experiences help the urban to understand the nature of farming and the sources of their food. But after this contact with livestock, the boy needs to wash his hands thoroughly as the risk of infections such as E.coli are significant – as has been discovered in other park zoos and farms. Cattle and sheep are the main carriers of E.coli O157 so hand washing using warm water and soap is an important and effective control. It is recommended that washing after working with or touching animals, their dung, manure, slurry or sewage. E.coli O157 can live for some months in the soil.