Diabetes is a condition that has no role with either bacteria or virus... It is a condition that occurs due to reduction in the body over the sugar levels. This happens either secondary to decreased insulin secretions or development of resistance to insulin.. So try chosing some other condition that has related to bacteria or virus.. You can chose hiv/253657?iL=true" >AIDS as a topic if you want to which is related to HIV virus... All the best for your project...