"Noncontagious" Quotes from Famous Books
 ... cows is either contagious or noncontagious. It does not follow that the contagium is the sole cause in every case in which it is present. We know that the organized germs (microbes) of contagion vary much in potency at different times, and that the animal system also varies in susceptibility to their attack. The germ may therefore ...
— Special Report on Diseases of Cattle • U.S. Department of Agriculture |
