Safety and efficacy of Hemicell® HT (endo‐1,4‐β‐mannanase) as a feed additive for chickens for fattening, chickens reared for laying, turkey for fattening, turkeys reared for breeding, weaned piglets, pigs for fattening and minor poultry and porcine species

zootechnical additives, digestibility enhancers, safety, efficacy, endo-1,4-b-mannanase,poultry, pigs
First published in the EFSA Journal
18 May 2018
17 April 2018
Scientific Opinion

Hemicell® HT/HT‐L is an additive that presents endo‐1,4‐β‐mannanase produced by a genetically modified strain of Paenibacillus lentus. This additive is aimed to be used as a feed additive for chickens for fattening/reared for laying, turkeys for fattening/reared for breeding, weaned piglets, pigs for fattening and minor poultry and porcine species. In a previous assessment, the EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) established the safety of the additive regarding the production strain, target species, consumer and user. However, limitations on the data regarding the absence of the production strain and its DNA did not permit to conclude on the safety of the additive for the environment. In that assessment, the Panel considered that the additive has a potential to be efficacious in the target species with the exception of pigs for fattening and in minor porcine species. The applicant provided new data to address the limitations identified. New data provided allowed the FEEDAP Panel to conclude that production strain and its recombinant DNA are not detected in the intermediate product used to formulate the additive. Therefore, the Panel concluded that the additive does not pose any environmental safety concern. Regarding the efficacy in pigs for fattening, the applicant provided a new analysis of the trials previously assessed which allowed the Panel to conclude that the additive has a potential to improve the feed to gain ratio at 32,000 U/kg feed. No data was provided regarding the efficacy in minor porcine species. However, considering the data available in major porcine species and that the mode of action of enzymes is well‐known and can be reasonably be considered to be similar among porcine species the Panel extrapolated the conclusion drawn in pigs for fattening to minor porcine species for fattening.

Panel members at the time of adoption
Gabriele Aquilina, Giovanna Azimonti, Vasileios Bampidis, Maria de Lourdes Bastos, Georges Bories, Andrew Chesson, Pier Sandro Cocconcelli, Gerhard Flachowsky, Jürgen Gropp, Boris Kolar, Maryline Kouba, Marta López‐Alonso, Secundino López Puente, Alberto Mantovani, Baltasar Mayo, Fernando Ramos, Guido Rychen, Maria Saarela, Roberto Edoardo Villa, Robert John Wallace and Pieter Wester.
Panel on Additives and Products or Substances used in Animal Feed
feedap [at]
EFSA Journal 2018;16(5):5270
Question Number
On request from
European Commission
Relevant information or parts of this scientific output have been blackened in accordance with the confidentiality requests formulated by the applicant pending a decision thereon by the European Commission. The full output has been shared with the European Commission, EU Member States and the applicant. The blackening will be subject to review once the decision on the confidentiality requests is adopted by the European Commission.