The answer is white blood cells.
Lymph, is similiar to the blood but has more concentration of white blood cells. There are different types of this cells, but to simplify, some of them will work against bacteria that do us harm. In our intestines, there are a lot of bacteria, in which most of them is good. Sometimes p<span>athogenic bacteria can appear but the white blood cells will eliminate them.</span>
You should always clean and sanitize surfaces and utensils before every use as bacteria and germs live on surfaces. It is especially important if you are eating off it like a spoon or fork.