[In vitro and in vivo production of amines by a Lactobacillus strain isolated from a cock crop].
The chicken digestive tract is mainly colonized by bacteria belonging to the Lactobacillus genus. One of these strains (LEM-207) isolated from the crop of a cock and closely resembling L. acidophilus, was able to develop on a carbohydrate-free medium. Production of carbon dioxide and synthesis of tyramine, putrescine and cadaverine were observed in the cultures. Once implanted in the crops of germ-free chickens, strain LEM-207 led to the formation of amines. In germ-free (axenic) animals, only endogenous tyramine was detected, whereas in monoassociated chickens, we found a production of tyramine, cadaverine and putrescine. The concentrations of cadaverine and putrescine decreased with increasing acidification of the contents, whereas the level of tyramine increased (7-fold higher level than in germ-free chicken). Amine production was not detected in the caeca. The toxicological aspects of tyramine production in terms of the animal are discussed.
D000588:Amines / Q000096:biosynthesis*; D000818:Animals; D002645:Chickens / Q000382:microbiology*; D003470:Culture Media; D004064:Digestive System / Q000382:microbiology; D006863:Hydrogen-Ion Concentration; D007778:Lactobacillus / Q000254:growth & development / Q000378:metabolism*; D008297:Male; D013997:Time Factors
D000588:Amines; D003470:Culture Media
Production d'amines in vitro et in vivo par une souche de Lactobacille isolée d'un jabot de coq.