Milk and Milk Products
Bulgarian butter milk is made with the help of

Streptococcus thermophilus
Streptococcus lactis
Lactobacillus bulgaricus
S. cremoris

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Milk and Milk Products
Non bacterial ropiness or sliminess in milk and milk products may be due to the

sliminess resulting from the thickness of the cream
stringiness caused by mastitis and in particular by fibrin and leucocytes from the cow's blood.
All of these
stringiness due to thin films of casein or lactalbumin during cooling

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