History of Bacteria
Oxygen was first produced on earth somewhere around 2.7 billion to 2.8 billon years ago. It took a
years after that for bacteria to build up oxygen levels high enough in the atmosphere to enable survival of larger life forms.
When there was enough oxygen in the air, there was an evolution of animals that led to man. And while man owed his life to algae bacteria, he was still battling food bacteria for survival. Man still needed to find a way to preserve and protect his food from bacteria.
Ancient Egyptians employed a variety of methods for food preservation. Great silos were constructed to preserve grain for long periods of time. Fish, meat, vegetables and fruits were preserved and protected from the effects of bacteria by drying and salting.
Fish curing, depicted in the tombs of ancient Egypt, was so highly regarded that only temple officials were entrusted with the knowledge of the art, and the Egyptian word for
is the same as that used to denote the process of embalming the dead.