Effects of Subclinical Mastitis on Heat Stability of Skimmilk and Skimmilk Powder

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Abstract
Skimmilk powders suitable for recom- bination into evaporated milk were experi- mentally manufactured from bulk milks containing varying proportions of sub- clinical mastitis mlik. Addition of milk from quarters infected by subclinical mas- titis to milk from healthy quarters invari- ably altered the heat stability of the man- ufactured powder. The heat stability of the powder could not be predicted from the heat stability of the milk. The position of the natural milk on the heat stability curve was altered by heat treatment, and the ex- tent of alteration was influenced by the proportion of milk from subclinical mas- title quarters present.