The presence of E. Coli in foods is undesirable because this indicates poor hygiene, but shellfish, particularly bivalve molluscs, from sewage contaminated inshore waters will carry high loads of E. Coli. Many countries prohibit the sale of live bivalve molluscs and other shellfish unless contamination with E. Coli or faecal coliforms is below a specified threshold value. The trivial name for the chemical 6-ethoxy-1,2-dihydro-2,2,4-trimethylquinoline. It is used as an antioxidant in fish meal, especially meal from fatty fish, and in animal feeds. Generally not approved for use in foods for humans other than in minor ingredients such as spices.