This document discusses spoilage in canned foods, which can occur through microbial or non-microbial means such as bacteria, chemical reactions, or physical deterioration. Spoilage can be caused by improper processing, inadequate sealing, high temperatures, or bacterial contamination. It is important to understand the factors that contribute to spoilage and recognize common signs like bulging cans or unusual odors to avoid health risks from consuming spoiled canned goods. Strict quality control measures during production and adherence to regulatory standards help ensure the safety of canned foods.