PAPER 2 UNIT 1
,Milk as a Nutr ient Sour ce:
● Milk is consider ed one of the most complete
foods for both humans and micr oor ganisms due
to its r ich nutr ient content.
● Its composition can var y based on cow br eed,
her ds, and even day-to-day changes within
individual cows.
,Typical Chemical Composition of Milk
, Nutr ient-Rich Envir onment for Bacter ia:
● Milk's nutr ient content suppor ts the gr owth of many bacter ial pathogens.
● Contamination can lead to milk-bor ne diseases.
● Sour ces of Milk Contamination:
● Pathogens may enter milk fr om diseased cows, but contamination often occur
to:
● Unclean hands of dair y wor ker s.
● Contaminated utensils and equipment.
● Unsanitar y conditions (bar ns, milk houses).
● Flies and polluted water supplies.