We have considered how these may be disturbed by microbes from without and from within.
You will often hear people call microbes - GERMS.
It is, therefore, seen that at least three different microbes play an important part in the same disease.
Both inflammation and fever are protective processes calculated to defend the organism against the attacks of microbes.
In process of time it became clear, however, that the worse the condition of a filter bed, in the then general acceptation of the term, the better it was as a microbe filter; that is to say, it was not until a fine film of mud and microbes had formed upon the surface of the sand that the best results were obtained.