Write a brief summary of the article..?? Most types of bacteria are harmless, and some are even beneficial. In fact, many of the foods you eat probably were made with the aid of bacteria.

For example, all cultured dairy products, such as cheese, yogurt, sour cream, and buttermilk, wouldn't exist without bacteria. Lactic acid bacteria change the sugar in milk to lactic acid, which prevents other harmful bacteria from taking hold. They also help change liquid milk into solid cheese; contribute enzymes that break down fats, proteins, and sugars; and give different varieties of cheese distinctive flavors.

In fact, unique cheese flavors come from the unique varieties of bacteria used to make them. Some cheese-makers even keep the type of bacteria they use completely secret so no one can imitate their products. Swiss cheese is made with bacteria that create little bubbles of gas, which give the cheese its distinctive “eyes”, or holes!

Pasteurization, which removes harmful bacteria from milk through the application of heat, often destroys lactic acid bacteria. So, in a process called inoculation, cheese-makers sometimes add frozen or freeze-dried cultures of bacteria to milk. Some cheeses, like bleu cheese and camembert, are even inoculated with mold!