Ropy slime-producing lactic acid bacteria contamination at meat processing plants.

At three Finnish meat processing plants the processing rooms, meat trimmings and carcasses were examined for the presence of ropy slime-producing lactic acid bacteria. Bacterial isolates similar to ropy slime-producing lactobacilli strains able to produce ropy slime on meat products, were recovered from the processing rooms and meat trimmings, indicating that these rooms and raw materials are a source of contamination for ropy bacteria. The ability to produce ropy slime would appear to be a common characteristic of lactobacilli, since altogether 10 different ropy lactobacilli groups were isolated in this study.