SCIENTIFIC OPINION Safety and efficacy of Natugrain ® Wheat TS (endo-1,4-β-xylanase) for use as feed additive for chickens for fattening and ducks 1 Scientific Opinion of the Panel on Additives and Products or Substances used in Animal Feed

SUMMARY Following a request from the European Commission, the European Food Safety Authority (EFSA) was asked to deliver a scientific opinion on the safety and efficacy of Natugrain ® Wheat TS (endo-1,4-β-xylanase) when used as a feed additive for chickens for fattening and ducks. The additive Natugrain ® Wheat TS is a preparation of endo-1,4-β-xylanase produced by a genetically modified strain of Aspergillus niger. This product is authorised as a feed additive for chickens and turkeys for fattening. EFSA has previously issued an opinion on the safety of this product for chickens for fattening, including the assessment of the safety for the consumer, the user and the environment, as well as the safety aspects of the genetic modifications. The additive is presented in two formulations: Natugrain ® Wheat TS for the solid form and Natugrain ® Wheat TS L for the liquid form. The product is intended for use as a feed additive in chickens for fattening and ducks, fed with feed containing high contents of non-starch polysaccharides, at a minimum dose of 280 TXU kg -1 complete feed. The solid (Natugrain ® Wheat TS) and liquid (Natugrain ® Wheat TS L) forms of the product are considered to be equivalent in terms of safety and efficacy at the same dose.