East Tennessee Children’s Hospital in Knoxville says it has seen nearly 10 children under the age of 4 test positive for E. coli. Chief Medical Officer Dr. Joe Childs says four children were being treated for kidney failure. The Knox County Health Department issued an alert yesterday, saying most of the ill children had consumed raw milk from French Broad Farm in Mascot. The department says that for now, people shouldn’t consume raw milk or any other unpasteurized products from the cow-share dairy. Department Director Dr. Martha Buchanan says drinking raw milk is a risk because bacteria like E. coli cannot be seen with the naked eye. Buchanan says roughly 1,800 E. coli bacteria can sit on the head of a pin, and around 10 could make someone sick.