IGNOU BPVI 11 2026 - Identify the major factors that promote the growth of microorganisms i

Question

Identify the major factors that promote the growth of microorganisms in milk. Explain the practical measures that can be adopted to control microbial spoilage during handling, storage, and transportation.

06 Mar 2026

Answer :

Word Count : 430

The growth of microorganisms in milk is influenced by several factors that create a favorable environment for bacterial proliferation. One of the primary factors is temperature. Milk is an excellent medium for microbial growth, and temperatures between 20°C and 40°C are particularly conducive to the rapid multiplication of bacteria. When milk is left at ambient temperature for prolonged periods, pathogenic and spoilage microorganisms multiply quickly, reducing the quality and safety of the milk. Another critical factor is the initial microbial load, which depends on the health of the milch animals, cleanliness during milking, and sanitation of utensils and equipment. Poor hygiene during milking, such as unwashed udders or contaminated milking equipment, introduces a high load of microorganisms into the milk. Nutrient availability also plays a significant role, as milk is rich in proteins, lactose, vitamins, and minerals, which provide an ideal substrate for bacterial growth. The pH of milk, which is

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