Spoilage of Milk and Milk Products

Spoilage of Milk and Milk Products

Spoilage of Milk and Milk Products -

Spoilage occurs when microorganisms degrade the carbohydrates, proteins, fats of milk and produce noxious, end products. Milk products as follows;

Spoilage type	Oraganisms involved	Signs of spoilage
Souring	Lactobacillus sp. Streptococcus sp.	Sour milk,Curd formation
Sweet curdling	Bacillus sp. Proteus sp. Micrococcus sp.	Alkaline pH Curd formation
Gas production	Clastoridium sp. coliform bacteria	Explosion of curds
Ropiness	Alcaligenes sp.,Klebsiella sp.,Enterobacter sp.	Stringy or slimy milk
Red rot	Serratia marcescens	Red colaration
Gray rot	clotridium sp.	Gray colaration, Foul smell
Dairy mould	Penicilium sp.,Geotrichum sp.	Mouldy appearance

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