Common Contaminants - The most common contaminants of different industrial processes are considerably different. Some examples are given below.

1. In canning industry, Clostridium butylicum is the chief concern. This obligate anaerobe can grow in sealed cans, and produce heat resistant spores and a deadly toxin. However, it is not a problem for catsup (too acidic), jam and jellies (too high sugar concentration) and milk (stored at low temperature).
2. Organisms like lactobacillus are a problem in production of wine.