Will consuming sour milk make you ill?

As I have actually stated prior to (and I am a Dairy Microbiologist with almost 50 years experience), contemporary, cooled milk does not go sour, it goes rotten. In the old days, milk included greater levels of lactic acid germs due to the fact that they grow out of the refrigerator and farms didn u2019 t have actually cooled barrels for storage of milk. Milk was saved in churns and got daily. Nowadays milk is farm cooled and got every second, or perhaps 3rd day. This chooses for germs that grow at low temperature levels. Low temperature level germs (psychrotrophs) are proteolytic and absorb the milk protein, instead of being sacharolytic and fermenting the lactose to lactic acid. The latter drops the pH of the milk (sours it) however the previous simply makes it go rotten. There are pathogenic germs that can grow at both cooled and unrefrigerated temperature levels, so consuming either sour or rotten milk is not an especially great concept, however, on the whole, the wasting germs in milk are not hazardous. As a guideline of thumb, putridity germs require to surpass 1 million per ml prior to you would discover an u201 coff u201 d odor or flavour, and the beginning count, right out of the factory would be 10,000 or two per ml of germs that can make it through pasteurisation. The latter procedure is created to damage pathogens, so milk is really safe and the bugs that send it off are not most likely to be unsafe.
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