Scientific Opinion on the safety and efficacy of Lactobacillus kefiri (DSM 19455) as a silage additive for all animal species

Technological additive, silage additive, Lactobacillus kefiri, QPS, safety, efficacy
First published in the EFSA Journal
8 April 2013
13 March 2013
Scientific Opinion


Lactobacillus kefiri is intended to improve the ensiling process at a dose of 5 x 107 CFU/kg fresh material. This species is considered by EFSA to be suitable for the qualified presumption of safety approach to safety assessment. As the identity of the strain has been established and no resistance to antibiotics of human and veterinary clinical significance was detected, the use of the strain in the production of silage is presumed safe for livestock species, consumers of products from animals fed the treated silage and for the environment. Given the proteinaceous nature of the active agent and the high dusting potential of the preparation tested, the FEEDAP Panel considers it prudent to treat this additive as a skin and respiratory sensitiser. It is also considered an irritant. The results of three efficacy studies indicated that L. kefiri has the potential to improve the aerobic stability of silage from forages with dry matter content above 40 % at the inclusion level of 5 x 107 CFU/kg forage.

Panel members at the time of adoption

Gabriele Aquilina, Alex Bach, Vasileios Bampidis, Maria De Lourdes Bastos, Gerhard Flachowsky, Mikolaj Antoni Gralak, Christer Hogstrand, Lubomir Leng, Secundino López-Puente, Giovanna Martelli, Baltasar Mayo, Derek Renshaw, Guido Rychen, Maria Saarela, Kristen Sejrsen, Patrick Van Beelen, Robert John Wallace and Johannes Westendorf.
Panel on Additives and Products or Substances used in Animal Feed
EFSA Journal 2013;11(4):3177
Question Number
On request from
European Commission