Safety and efficacy of a feed additive consisting of endo-1,4-beta-xylanase produced by Trichoderma reesei ATCC PTA-5588, protease produced by Bacillus subtilis CBS 148232, and alpha-amylase produced by Bacillus licheniformis ATCC SD-6525 (Axtra® XAP 104 TPT) for chickens for fattening, laying hens and minor poultry species (Genencor international B.V.).

Content Provider	Europe PMC
Author	Bampidis, Vasileios Azimonti, Giovanna Bastos, Maria de Lourdes Christensen, Henrik Dusemund, Birgit Fašmon Durjava, Mojca Kouba, Maryline López‐Alonso, Marta Puente, Secundino López Marcon, Francesca Mayo, Baltasar Pechová, Alena Petkova, Mariana Ramos, Fernando Sanz, Yolanda Villa, Roberto Edoardo Woutersen, Ruud Dierick, Noël Saarela, Maria Brozzi, Rosella Pettenati, Elisa Anguita, Montserrat
Abstract	AbstractFollowing a request from the European Commission, EFSA was asked to deliver a scientific opinion on the safety and efficacy of endo‐1,4‐beta‐xylanase produced by Trichoderma reesei ATCC PTA‐5588, protease produced by Bacillus subtilis CBS 148232, and alpha‐amylase produced by Bacillus licheniformis ATCC SD‐6525, Axtra® XAP 104 TPT, for chickens for fattening, laying hens and minor poultry species. In the previous assessment, a series of shortcomings did not allow to conclude on the safety of the product. The shortcomings included uncertainty on the presence of viable cells of one of the production strains; uncertainty on the identity of the production strains of the ■■■■■ used in the manufacturing process of the protease and their presence in the final additive; and uncertainty about the test item used for the toxicological testing of the xylanase. Moreover, the Panel could not conclude on the efficacy in laying hens. The applicant submitted some new information to address some of the limitations previously identified. Moreover, the applicant declared a change in the production strain of the protease, substituting B. subtilis ATCC SD‐2107 for B. subtilis CBS 148232. The Panel concluded that the additive is safe for the target species at the recommended use level (1,000 xylanase U, 100 amylase U and 2,000 protease U per kg feed). The additive is safe for the consumers of food products obtained from animals fed with the additive and raises no concerns for the environment. The Panel could not conclude on the skin/eye irritancy potential of the additive nor on its dermal sensitisation potential. Owing to the proteinaceous nature of the active substances, the additive is considered a respiratory sensitiser. The additive is efficacious in chickens for fattening, chickens reared for laying and minor poultry species up to the point of lay at the level of 2,000 xylanase U, 200 amylase U and 4,000 protease U per kg feed (double the minimum recommended use level). Owing to the lack of sufficient data, the Panel could not conclude on the efficacy of the additive for laying hens.
Page Count	13
Volume Number	21
PubMed Central reference number	PMC9933466
Issue Number	2
PubMed reference number	36818641
Journal	EFSA Journal [EFSA J]
e-ISSN	18314732
DOI	10.2903/j.efsa.2023.7816
Language	English
Publisher	John Wiley and Sons Inc.
Publisher Date	2023-02-16
Publisher Place	Hoboken
Access Restriction	Open
Rights License	This is an open access article under the terms of the http://creativecommons.org/licenses/by-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited and no modifications or adaptations are made. © 2023 European Food Safety Authority. EFSA Journal published by Wiley‐VCH GmbH on behalf of European Food Safety Authority.
Subject Keyword	zootechnical additives digestibility enhancers safety efficacy poultry
Content Type	Text
Resource Type	Article
Subject	Microbiology Food Science Plant Science Parasitology Animal Science and Zoology Veterinary