Metodo para seleccionar una cepa de bacteria del acido lactico que comprende detectar bacterias por la presencia de un operon histidina activa y seleccionar una cepa que tenga un operon histidina activa y sea capaz de producir histamina; y producto que comprende celulas de dicha cepa.

摘要

A method is provided of selecting specific probiotic lactic acid bacteria producing histamine and the use of such strains for beneficial effects for mammals. The method includes selecting a lactic acid bacterial strain for use in the local production of histamine in a mammal, and further comprises screening bacteria for the presence of an active histidine operon and selecting a strain which has an active histidine operon and is capable of producing histamine. Preferably said strain is selected for its ability to produce histamine at a level of greater than 250 pg/ml. The present invention further provides products comprising the strains obtainable by the selection methods of the invention for use in the local production of histamine in a mammal, in particular for use in the treatment or prophylaxis of inflammatory conditions.