News last update:6 Aug 2012

EFSA: Ronozyme WX safe for poultry, piglets and fatteners

In its scientific review on the safety and efficacy of Ronozyme WX (endo-1,4-beta-xylanase) as a feed additive for poultry, piglets (weaned) and pigs for fattening the European Food Safety Authority (EFSA) has published a positive opinion.

Ronozyme WX (DSM) is a preparation of endo-1,4-beta-xylanase produced by a genetically modified strain of Aspergillus oryzae and is presented in two forms, coated (CT) and liquid (L).
The solid and liquid forms of the additive are considered equivalent in terms of safety and efficacy at the same dose.
The final enzyme preparations contain no cultivable production organisms or recombinant DNA, given the limits of detection and evidence for the presence of deoxyribonuclease activity.
This conclusion allows extrapolation to all minor poultry species for fattening and can be extended to pigs for fattening.
The active ingredient of Ronozyme WX is a protein and as such will be degraded/inactivated during passage through the digestive tract of animals. Therefore, no risks to the environment are expected.
The efficacy of Ronozyme WX has been demonstrated in chickens, turkeys and ducks for fattening at a minimum proposed dose of 100 FXU/kg complete feed. This conclusion can be extended to all minor poultry species for fattening.
Efficacy has also been demonstrated in piglets and in pigs for fattening at a minimum dose of 200 FXU/kg complete feed.

Editor AllAboutFeed

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