Evaluation of heat treatments, different from those currently established in the EU legislation, that could be applied to live bivalve molluscs from B and C production areas, that have not been submitted to purification or relaying, in order to eliminate pathogenic microorganisms
2015; Wiley; Volume: 13; Issue: 12 Linguagem: Inglês
10.2903/j.efsa.2015.4332
ISSN1831-4732
Tópico(s)Hepatitis Viruses Studies and Epidemiology
ResumoEFSA JournalVolume 13, Issue 12 4332 OpinionOpen Access Evaluation of heat treatments, different from those currently established in the EU legislation, that could be applied to live bivalve molluscs from B and C production areas, that have not been submitted to purification or relaying, in order to eliminate pathogenic microorganisms EFSA Panel on Biological Hazards (BIOHAZ), EFSA Panel on Biological Hazards (BIOHAZ)Search for more papers by this author EFSA Panel on Biological Hazards (BIOHAZ), EFSA Panel on Biological Hazards (BIOHAZ)Search for more papers by this author First published: 14 December 2015 https://doi.org/10.2903/j.efsa.2015.4332Citations: 9 Panel members: Ana Allende, Declan Bolton, Marianne Chemaly, Robert Davies, Pablo Salvador Fernandez Escamez, Rosina Girones, Lieve Herman, Kostas Koutsoumanis, Roland Lindqvist, Birgit Nørrung, Antonia Ricci, Lucy Robertson, Giuseppe Ru, Moez Sanaa, Marion Simmons, Panagiotis Skandamis, Emma Snary, Niko Speybroeck, Benno Ter Kuile, John Threlfall, and Helene Wahlström. Correspondence: [email protected] Acknowledgement: The Panel wishes to thank the members of the Working Group on heat treatment of bivalve molluscs: Pablo S Fernandez-Escamez, Kostas Koutsoumanis, David Lees, Roland Lindqvist, Micheal OˈMahony, and Elisabetta Suffredini for the preparatory work on this scientific output and EFSA staff members: Winy Messens, José Cortiñas Abrahantes and Emmanouil Chantzis for the support provided to this scientific output. Adoption date: 3 December 2015 Published date: 14 December 2015 Question number: EFSA-Q-2015-00161 On request from: European Commission AboutPDF ToolsExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract EU rules state that unpurified live bivalve molluscs from B and C production areas must undergo specified heat treatment to eliminate pathogenic microorganisms. Alternative time-temperature conditions were evaluated to the permitted treatment of at least 90°C for at least 90 seconds (s) in the mollusc flesh. The most important viral hazards associated with bivalve molluscs were identified as Norovirus (NoV) and Hepatitis A virus (HAV). A HAV thermal inactivation model was developed to identify equivalent (achieve the same log reduction) time-temperature combinations to 90°C for 90 s. The model was based on HAV inactivation data in mollusc matrices during isothermal heat treatment and estimated the z-value as 27.5°C. Evaluation against inactivation in whole bivalve molluscs showed that the observed HAV inactivation is in general higher than predicted. Under the conditions and matrices studied HAV is generally more heat tolerant than NoV surrogates. The model provided alternative processes equivalent to 90°C for 90 s without considering the effect of heat-up and cool-down times on virus inactivation. As confirmed by industrial profiles, there is a heat-up and cool-down time that will enhance the safety of the final product and can lead to variations in HAV reduction depending on the process design. This shows the need for a Performance Criterion (PC) for the whole process, which is the required log reduction during heat treatment. A risk assessment model was developed and a case study illustrated the relationship between a PC and the HAV risk at consumption. If risk managers establish an ALOP, this can be translated to a PC and a Process Criterion (PrC). It is demonstrated that a PrC expressed as an F-value (the equivalent processing time of a hypothetical isothermal process at a reference temperature) is more appropriate than the currently used time-temperature combination since it takes into account non-isothermal conditions. References Bates D, Mächler M, Bolker B and Walker S, 2014. lme4: Linear mixed-effects models using Eigen and S4. R package version 1.1–7. 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