WORLD HISTORY

Detailed explanation-1: -We have also forgotten how rare it was for parents to see all of their children survive to adulthood. Still, it has been little more than a century and a half since Robert Koch made the discoveries that led Louis Pasteur to describe how small organisms called germs could invade the body and cause disease.

Detailed explanation-2: -During his experiments in the 1860s, French chemist Louis Pasteur developed modern germ theory. He proved that food spoiled because of contamination by invisible bacteria, not because of spontaneous generation. Pasteur stipulated that bacteria caused infection and disease.

Detailed explanation-3: -The “one pathogen to one disease” paradigm was developed based on the germ theory of disease that was formulated by Robert Koch the late 19th century and shaped the development of diagnostic microbiology in medicine.

Detailed explanation-4: -In 1862, a French chemist named Louis Pasteur discovered that heat kills germs in liquids, preventing bacterial growth, food spoilage and foodborne illnesses.