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Bampidis V, Azimonti G, Bastos MDL, Christensen H, Dusemund B, Fašmon Durjava M, Kouba M, López‐Alonso M, López Puente S, Marcon F, Mayo B, Pechová A, Petkova M, Ramos F, Sanz Y, Villa RE, Woutersen R, Cocconcelli PS, Glandorf B, Herman L, Maradona MP, Saarela M, Anguita M, Galobart J, Holczkencht O, Manini P, Pettenati E, Pizzo F, Tarrés‐Call J. Safety and efficacy of the feed additive consisting of l-tryptophan produced by Escherichia coli KCCM 80210 for all animal species (Daesang Europe BV). EFSA J 2021; 19:e06425. [PMID: 33732389 PMCID: PMC7938405 DOI: 10.2903/j.efsa.2021.6425] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Following a request from the European Commission, the Panel on Additives and Products or substances used in Animal Feed (FEEDAP) was asked to deliver a scientific opinion on the safety and efficacy of the feed additive consisting of l-tryptophan produced by fermentation with Escherichia coli KCCM 80210 when used as a nutritional additive in feed for all animal species and categories. The production strain E. coli KCCM 80210 is safe for the production of l-tryptophan and it was not detected in the final product. The Panel notes that two out of five batches of the additive do not comply with the minimum specification of 98% l-tryptophan on a dry matter basis proposed by the applicant. The use of l-tryptophan (≥ 98%) produced by E. coli KCCM 80210 in supplementing feed to compensate for l-tryptophan deficiency in feedingstuffs is safe for non-ruminant target species. There may be a risk for an increased production of toxic metabolites when unprotected l-tryptophan is used in ruminants. The use of l-tryptophan produced by E. coli KCCM 80210 in animal nutrition raises no safety concerns to consumers of animal products and to the environment. The additive under assessment is considered a mild eye irritant. The endotoxin activity of the additive and its dusting potential indicate a risk by inhalation for the users. The additive is not a skin irritant and is not a skin sensitiser. The additive l-tryptophan is regarded as an effective source of the amino acid l-tryptophan for all non-ruminant species. In order to be as efficacious in ruminants as in non-ruminants, it should be protected from ruminal degradation.
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Bampidis V, Azimonti G, Bastos MDL, Christensen H, Dusemund B, Kos Durjava M, Kouba M, López‐Alonso M, López Puente S, Marcon F, Mayo B, Pechová A, Petkova M, Sanz Y, Villa RE, Woutersen R, Cubadda F, Dierick N, Glandorf B, Herman L, Mantovani A, Saarela M, Anguita M, Pettenati E, Tarrés‐Call J, Ramos F. Safety and efficacy of l-tryptophan produced by fermentation with Escherichia coli KCCM 10534 for all animal species. EFSA J 2020; 18:e06071. [PMID: 32874283 PMCID: PMC7448079 DOI: 10.2903/j.efsa.2020.6071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Following a request from the European Commission, the Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) was asked to deliver a scientific opinion on l-tryptophan produced by fermentation with a non-genetically modified strain of Escherichia coli KCCM 10534 when used as a nutritional additive in feed and water for drinking for all animal species and categories. The production strain E. coli KCCM 10534 is safe for the production of l-tryptophan and it was not detected in the final product. The use of l-tryptophan produced using E. coli KCCM 10534 in supplementing feed to compensate for tryptophan deficiency in feedingstuffs is safe for non-ruminant target species. There may be a risk for an increased production of toxic metabolites when unprotected tryptophan is used in ruminants. The FEEDAP Panel has concerns on the safety of the simultaneous oral administration of l-tryptophan via water for drinking and feed due to possible amino acid imbalances. The use of l-Tryptophan produced by E. coli KCCM 10534 in animal nutrition raises no safety concerns to consumers of animal products and to the environment. The additive under assessment is considered not toxic by inhalation, it is not a skin or eye irritant and is not a skin sensitiser. The endotoxin activity of the additive and its dusting potential indicate a risk by inhalation for the users. The product l-tryptophan is regarded as an effective source of the amino acid l-tryptophan for all non-ruminant species. In order to be as efficacious in ruminants as in non-ruminants, it should be protected from ruminal degradation.
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Bampidis V, Azimonti G, Bastos MDL, Christensen H, Dusemund B, Kouba M, Kos Durjava M, López-Alonso M, López Puente S, Marcon F, Mayo B, Pechová A, Petkova M, Sanz Y, Villa RE, Woutersen R, Costa L, Dierick N, Flachowsky G, Glandorf B, Herman L, Mantovani A, Saarela M, Wallace RJ, Anguita M, Tarrés-Call J, Ramos F. Safety and efficacy of l-tryptophan produced by fermentation with Escherichia coli KCCM 80152 for all animal species. EFSA J 2019; 17:e05695. [PMID: 32626318 PMCID: PMC7009198 DOI: 10.2903/j.efsa.2019.5695] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Following a request from the European Commission, the Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) was asked to deliver a scientific opinion on l-tryptophan produced by fermentation using Escherichia coli KCCM 80152 when used as nutritional additive in feed and water for drinking for all animal species. The production strain and its recombinant DNA were not detected in the additive. l-Tryptophan, manufactured by fermentation with E. coli KCCM 80152, does not give rise to any safety concern with regard to the genetic modification of the production strain. The use of l-tryptophan produced using E. coli KCCM 80152 in supplementing feed to compensate for tryptophan deficiency in feedingstuffs is safe for non-ruminant target species. Using unprotected forms of tryptophan in ruminants can be a risk. The use of l-tryptophan produced by fermentation using E. coli KCCM 80152 in animal feed presents no concerns to consumers of animal products. Due to the content of endotoxins, the additive poses a risk for persons handling the additive when exposed by inhalation. The additive is not considered irritant for skin or eyes and is not considered a skin sensitiser. The additive under assessment is safe for the environment. The additive under assessment is regarded as an effective source of the amino acid l-tryptophan for all non-ruminant species. If l-tryptophan is intended for use in ruminants, it should be protected from ruminal degradation.
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Bampidis V, Azimonti G, Bastos MDL, Christensen H, Dusemund B, Kouba M, Kos Durjava M, López‐Alonso M, López Puente S, Marcon F, Mayo B, Pechová A, Petkova M, Sanz Y, Villa RE, Woutersen R, Costa L, Dierick N, Flachowsky G, Glandorf B, Herman L, Mantovani A, Saarela M, Wallace RJ, Anguita M, Tarrés‐Call J, Ramos F. Safety and efficacy of l-tryptophan produced by fermentation with Escherichia coli CGMCC 7.248 for all animal species. EFSA J 2019; 17:e05601. [PMID: 32626226 PMCID: PMC7009148 DOI: 10.2903/j.efsa.2019.5601] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Following a request from the European Commission, the Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) was asked to deliver a scientific opinion on l-tryptophan produced by fermentation with a genetically modified strain of Escherichia coli CGMCC 7.248 when used as a nutritional additive in feed and water for drinking for all animal species and categories. The production strain E. coli CGMCC 7.248 and its recombinant DNA were not detected in the final product. The product l-tryptophan, manufactured by fermentation with E. coli CGMCC 7.248, does not give rise to any safety concern with regard to the genetic modification of the production strain. l-Tryptophan produced by E. coli CGMCC 7.248 is safe for non-ruminant target species. The use of unprotected l-tryptophan in ruminant feed should be avoided. l-Tryptophan produced by fermentation by E. coli CGMCC 7.248 is safe for the consumer. The level of endotoxins present in the product and its dusting potential indicate an inhalation risk for the user. l-Tryptophan produced by E. coli CGMCC 7.248 is not a skin or eye irritant but it is a dermal sensitiser. The use of l-tryptophan produced by E. coli CGMCC 7.248 in animal nutrition does not pose a risk to the environment. The product under assessment is regarded as an effective source of the amino acid l-tryptophan for all non-ruminant species. For the supplemental l-tryptophan to be as efficacious in ruminants as in non-ruminant species, it requires protection against degradation in the rumen.
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Rychen G, Aquilina G, Azimonti G, Bampidis V, Bastos MDL, Bories G, Chesson A, Flachowsky G, Gropp J, Kolar B, Kouba M, López-Alonso M, López Puente S, Mayo B, Ramos F, Saarela M, Villa RE, Wallace RJ, Wester P, Glandorf B, Herman L, Kärenlampi S, Aguilera J, Cocconcelli PS. Safety of l-tryptophan technically pure, produced by Escherichia coli CGMCC 3667, for all animal species based on a dossier submitted by GBT Europe GmbH. EFSA J 2017; 15:e04705. [PMID: 32625427 PMCID: PMC7009801 DOI: 10.2903/j.efsa.2017.4705] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
l‐Tryptophan, technically pure, is a feed additive produced by fermentation with a genetically modified strain of Escherichia coli. The Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) of EFSA, issued two opinions on the safety and efficacy of the product, in which it could not conclude on the safety of this additive for target animals, consumer, user and the environment, due to the insufficient characterisation of the genetic modification. The European Commission asked the Authority to deliver an opinion on the safety of l‐tryptophan, technically pure, as a nutritional additive for all animal species based on additional data submitted by the applicant. Based on new information provided on the genetic modification, including the presence/absence of antibiotic resistance genes in the production strain, the FEEDAP Panel concludes that the l‐tryptophan is safe for target animals, consumers, users and the environment.
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