What are the signs of food spoilage?

• A. Off-odours, discolouration, slime/stickiness, mould growth, changes in texture, unusual taste, production of gas, blown cans or leaking packs
• B. Only colour change
• C. Only texture change
• D. Only smell

Answer: (A)

Signs of food spoilage come from changes caused by microbial growth and other chemical processes that affect how a food looks, smells, tastes, and feels as well as how its packaging holds up. The most thorough set of indicators includes off-odours, discolouration, slime or stickiness, mould growth, changes in texture, unusual taste, production of gas, and packaging damage such as blown cans or leaking packs. Together, these signs cover the main ways spoilage happens: odors point to microbial activity, visible colour changes and mould show deterioration, slime indicates microbial films, texture changes reflect breakdown of structure, unusual taste warns of chemical or microbial changes, gas production signals fermentation or gas buildup, and packaging damage reveals internal pressure or leaks. Since different foods spoil in different ways, and some signs may appear alone while others appear together, using the full range of indicators helps ensure you don’t miss spoiled items.