Opinion of the Scientific Panel on Additives and Products or Substances used in Animal Feed on the safety of the enzymatic product Kemzyme W Dry for use as feed additive for laying hens and turkeys for fattening
2005
(FEEDAP), EFSA Panel on Additives and Products or Substances used in Animal Feed
The enzyme preparation Kemzyme W dry is based on a mixture of endo-1,3(4)-β-glucanase produced by Aspergillus aculeatus, endo-1,4-β-glucanase produced by Trichoderma longibrachiatum, alpha-amylase produced by Bacillus amyloliquefaciens, bacillolysin produced by Bacillus amyloliquefaciens and endo-1,4-β-xylanase produced by Trichoderma viride has been provisionally authorised for the use as a feed additive, (feed enzyme No. 53), for chickens for fattening and piglets. The applicant company has submitted a request for an extension of use of the product to laying hens and turkeys for fattening. The safety assessment for the consumer, user and the environment of this enzyme preparation has already been done by the Scientific Committee on Animal Nutrition (SCAN) in its "Opinion of the Scientific Committee on Animal Nutrition on the use of certain enzymes in animal feedingstuffs". In addition, FEEDAP Panel of EFSA concluded that the Bacillus production strains, when used as a source of extracellular enzyme for the preparation of Kemzyme W dry, do not present a toxigenic risk. A tolerance test was conducted with 48 laying hens over a period of 28 days, with ten times the highest recommended dose of Kemzyme W Dry (10 g kg-1). Due to the short duration of the tolerance trial, the FEEDAP Panel cannot conclude on the safety of Kemzyme W Dry for laying hens. A tolerance test conducted with 315 male turkeys (21 week period) and with 351 female turkeys (12 week period) with ten times the maximum recommended dose of Kemzyme W Dry (10 g kg-1) did not show any significant adverse effects on health and performance of the animals. Therefore, the FEEDAP Panel concludes that Kemzyme W dry is safe for turkeys for fattening.
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