Question

Microbial spoilage of canned foods at ambient temperature is genearlly the result of -------- spoilage.

• A. Leaker
• B. Flipper
• C. Hydrogen swell
• D. TA

Hint:

Leaker spoilage is prevented by maintaining proper chlorine levels in retort cooling water and regularly checking the dimensions of the double seam.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Canned foods are thermally processed to achieve commercial sterility.
When spoilage occurs at room temperature, it is typically due to either underprocessing or container defects.

Step 2: Detailed Explanation:
1. Leaker spoilage occurs when cooling water or air enters the can through microscopic defects in the double seam as the can cools after retorting.
2. This introduces non-sporeforming bacteria, leading to microbial growth and spoilage at ambient temperatures.
3. This is the most common cause of ambient-temperature bacterial spoilage in commercial canning operations.
4. Thermophilic Anaerobe (TA) spoilage requires elevated storage temperatures (\(>45\ ^{\circ}\text{C}\)) to manifest.
5. Flipper and Hydrogen swell are physical/chemical defects or early stages of swelling, not distinct microbial pathways.

Step 3: Final Answer:
Microbial spoilage of canned foods at ambient temperature is generally the result of Leaker spoilage.