Why is bacteria used to make cheese and yoghurt?

Using bacteria to make cheese and yoghurt. Making cheese and yoghurt are also processes that depend upon micro-organisms - in this case bacteria. The souring of milk is a fermentation process, as it takes place better when oxygen is absent. Fresh milk contains sugarsand some bacteria. read more

Starter cultures are used early in the cheese making process to assist with coagulation by lowering the pH prior to rennet addition. The metabolism of the starter cultures contribute desirable flavor compounds, and help prevent the growth of spoilage organisms and pathogens. read more

To understand how yogurt works, you first have to understand how the bacteria in yogurt work. The good bacteria in yogurt are often called probiotics. They come in the form of culture concentrates in certain foods, dietary supplements and fermented dairy products, like yogurt or cheese [source: WHO]. Probiotics are usually bacteria, but yeast can act as a probiotic, too. These good bacteria are used to ferment milk. read more

Using bacteria to make cheese and yoghurt Making cheese and yoghurt are also processes that depend upon micro-organisms - in this case bacteria. The souring of milk is a fermentation process, as it takes place better when oxygen is absent. read more