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

S. cremoris
Lactobacillus bulgaricus
Streptococcus lactis
Streptococcus thermophilus

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

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

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