Nestle USA has expressed concern and regret after US food authorities finally confirmed the bacterium E.coli H7:157 had been detected in its Toll House refrigerated cookie dough.
Investigators announced yesterday a trace of the deadly bacteria was found in a tub of Nestle’s chocolate cookie dough made at the company’s Virginia plant in February. The contaminated [...]

Several conservation methods have been used to prevent food spoilage and food poisoning ever since ancient times. These are; salting, drying and smoking. Nowadays, chilling, freezing, dehydration and canning methods are used.
You can see the names of food conservation methods below;
Preparing foods under hygiene rules
High temperature

Boiling
Vapour application
Pasteurization

Low temperature

Chilling
Freezing
Dehydration

High Osmotic Pressure

Concentrated  sugar
Salting

Chemical additives

Organic acids
Smoking
Fermentation

Radiation

UV lights
Ionized radiation

Although  scientists have made great strides in milk hygiene and technology after Second World War, milk-borne zoonosis diseases are still very important in human health. That is why milk hygiene and control is very important part of the food science.
Milk is contaminated by bacteria and viruses via unhealthy animals, people hands, milking utensils or water. [...]