Dear Sir,

Being a nurse, I cannot understand why there is so much mystery about the spread of E. coli?

Go to the source.

Travel across America and there are hundreds upon hundreds of workers picking the fruit and vegetables in the fields.

Get out of the car, as I have, and look for the sanitation stations. And they are far and away. So it is possible some workers cannot be bothered to walk that far.

It does not take much imagination to envisage the rest. I am sure the farmers do their best, but that is the source of where it all begins.

E. coli is highly infectious and debilitating, and can easily be transferred. Strict hygiene at all times, must be taught in schools, colleges and all the armed forces and catering establishments.

A constant surprise visit from the health department should be mandatory. As early as kindergarten, children can learn just how important washing their hands can be.

DIANA WILLIAMS