n't really know about); Grade A is the freshest, B less fresh and C only sold to food manufacturers.She gives a guide to common food pathogens - moulds, parasites, different types of bacteria (e.coli, listeria, salmonella, shingella) and viruses (I had not realised that Hepatitis A is spread through food) and describes how they get into food, the illnesses they cause, how to avoid them and how to