摘要：Conjugated linoleic acid (CLA) is a common term of various positional and geometric isomers of linoleic acid (LA) which contains two unsaturated double bonds in the fatty acid chains. Isomers are synthesized as an intermediate product during the bacterial biohydrogenation of LA to stearic acid in the rumen of ruminants or from the conversion of trans vaccenic acid by the . 9 -desaturase enzyme in the mammary glands and adipose tissues. CLA isomers are found in many foods, but mainly present in meat and dairy products obtained from ruminant animals. Although there are diverse positive effects of CLA isomers on health, some potential concerns that can be caused by these compounds have been stated in some studies. CLA production is not specific to rumen bacteria; it was determined that some lactic acid and propionic acid bacteria as well as microorganisms isolated from the milk products, human and animal intestines involved in the production. Therefore, use of these microorganisms in food industry, especially within the dairy branch, for the production of traditional or new fermented products enriched with CLA is a great importance.
