CEN ISO TS 15216-2-2013 Microbiology of food and animal feed - Horizontal method for determination of hepatitis A virus and norovirus in food using real-time RT-PCR - Part 2 Method.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationPD CEN ISO/TS 15216-2:2013Microbiology of food andanimal feed Horizontalmethod for determination ofhepatitis A virus and norovirusin food using real-time RT-PCRPart 2: Method for

2、 qualitative detectionCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-PD CEN ISO/TS 15216-2:2013 PUBLISHED DOCUMENTNational forewordThis Published Document is the UK implementati

3、on ofCEN ISO/TS 15216-2:2013.The UK participation in its preparation was entrusted to TechnicalCommittee AW/9, Microbiology.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a c

4、ontract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013 ISBN 978 0 580 80627 8 ICS 07.100.30 Compliance with a British Standard cannot confer immunity fromlegal obligations.This Published Document was published under t

5、he authority of theStandards Policy and Strategy Committee on 31 May 2013. Amendments issued since publicationDate T e x t a f f e c t e dCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from

6、IHS-,-,-TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN ISO/TS 15216-2 May 2013 ICS 07.100.30 English Version Microbiology of food and animal feed - Horizontal method for determination of hepatitis A virus and norovirus in food using real-time RT-PCR - Part 2: Method for

7、qualitative detection (ISO/TS 15216-2:2013, Corrected Version 2013-05-01) Microbiologie des aliments - Mthode horizontale pour la recherche des virus de lhpatite A et norovirus dans les aliments par la technique RT-PCR en temps rel - Partie 2: Mthode de dtection qualitative (ISO/TS 15216-2:2013, Ver

8、sion Corrige 2013-05-01) Mikrobiologie von Lebensmitteln und Futtermitteln - Horizontales Verfahren zum Nachweis von Hepatitis A-Viren und Noroviren in Lebensmitteln mittels Real time PCR - Teil 2: Verfahren fr den qualitativen Nachweis (ISO/TS 15216-2:2013, korrigierten Fassung von 2013-05-01) This

9、 Technical Specification (CEN/TS) was approved by CEN on 8 March 2013 for provisional application. The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their comments, particularly on the question whether the CEN/TS

10、 can be converted into a European Standard. CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in paralle

11、l to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany

12、, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NO

13、RMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN ISO/TS 15216-2:2013: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for R

14、esaleNo reproduction or networking permitted without license from IHS-,-,-PD CEN ISO/TS 15216-2:2013CEN ISO/TS 15216-2:2013 (E) 3 Foreword This document (CEN ISO/TS 15216-2:2013) has been prepared by Technical Committee ISO/TC 34 “Food products“ in collaboration with Technical Committee CEN/TC 275 “

15、Food analysis - Horizontal methods” the secretariat of which is held by DIN. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According

16、 to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany

17、, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO/TS 15216-2:2013, Corrected Version 2013-05-01 has been a

18、pproved by CEN as CEN ISO/TS 15216-2:2013 without any modification. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-PD CEN ISO/TS 15216-2:2013ISO/TS 15216-2:2013(E) ISO 2013 All

19、rights reserved iiiContents PageForeword ivIntroduction vii1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 34.1 Virus extraction 34.2 RNA extraction 34.3 Real-time reverse transcription polymerase chain reaction (real-time RT-PCR) . 34.4 Control materials 44.5 Test results

20、45 Reagents 45.1 General . 45.2 Reagents used as supplied 45.3 Prepared reagents 66 Apparatus and materials 67 Sampling 88 Procedure. 88.1 General laboratory requirements . 88.2 Virus extraction 88.3 RNA extraction . 108.4 Real-time RT-PCR . 109 Interpretation of results 129.1 General 129.2 Construc

21、tion of process control virus RNA standard curve129.3 Control for amplification efficiency . 129.4 Calculation of extraction efficiency 139.5 Theoretical limit of detection 1310 Expression of results .1311 Test report 14Annex A (normative) Diagram of procedure .15Annex B (informative) Real-time RT-P

22、CR mastermixes and cycling parameters 16Annex C (informative) Real-time RT-PCR primers and hydrolysis probes for the detection of HAV, norovirus GI and GII and mengo virus (process control) 17Annex D (informative) Growth of mengo virus strain MC0for use as a process control .19Annex E (informative)

23、RNA extraction using the BioMerieux NucliSenssystem .20Annex F (normative) Composition and preparation of reagents and buffers 22Annex G (informative) Generation of external control RNA (EC RNA) stocks .24Annex H (informative) Typical optical plate layout .26Bibliography .27Copyright European Commit

24、tee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-PD CEN ISO/TS 15216-2:2013ISO/TS 15216-2:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national stan

25、dards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International org

26、anizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given

27、in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 %

28、 of the member bodies casting a vote.In other circumstances, particularly when there is an urgent market requirement for such documents, a technical committee may decide to publish other types of document: an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical ex

29、perts in an ISO working group and is accepted for publication if it is approved by more than 50 % of the members of the parent committee casting a vote; an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical committee and is accepted for publication if it

30、is approved by 2/3 of the members of the committee casting a vote.An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a further three years, revised to become an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is confirmed, it is revi

31、ewed again after a further three years, at which time it must either be transformed into an International Standard or be withdrawn.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying a

32、ny or all such patent rights.ISO/TS 15216-2 was prepared by the European Committee for Standardization (CEN), in collaboration with Technical committee ISO/TC 34, Food products, Subcommittee SC 9 Microbiology.This corrected version of ISO/TS 15216-2:2013 incorporates the following corrections. Throu

33、ghout, textual references have been updated to take reordering of the annexes into account. Annex B was formerly Annex E; Annex C was formerly Annex D; Annex D was formerly Annex G; Annex E was formerly Annex C; Annex F was formerly Annex B; Annex G was formerly Annex H; Annex H was formerly Annex F

34、. Where units of shaking operations are mentioned, “oscillations min1” replaces “min1”. Many cross-references to reagents or apparatus subclauses are added. A phrase citing Annex A is added to the end of the introduction. The definitions for “food surface” (formerly 3.2 and 3.3) are combined and exp

35、anded in a redrafted 3.2; in consequence, the following terms in Clause 3 are renumbered. In 3.4, Note 2, “There is only one serotype” is transposed to the end of Note 1. Also, “group 2 biological agent by the European Union and as a risk group 2 human aetiological agent by the United States Nationa

36、l Institutes of Health” replaces “UK Advisory Committee on Dangerous Pathogens (ACDP) hazard group 2 pathogen”.iv ISO 2013 All rights reservedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license f

37、rom IHS-,-,-PD CEN ISO/TS 15216-2:2013ISO/TS 15216-2:2013(E) In 3.5, Note 2, “group 2 biological agents by the European Union and as risk group 2 human aetiological agents by the United States National Institutes of Health” replaces “ACDP hazard group 2 pathogens”. In 3.13, “used in” replaces “used

38、as template in”. In 5.2.11, “from Aspergillus niger or A. aculeatus” is inserted after “Pectinase”. In 6.1,”Aerosol resistant tips should be used unless unobstructed tips are required, e.g. for aspiration.” is inserted. In 6.5, “37 1,0” replaces “37 10”. A redrafted 6.10 on centrifuge(s) and rotor(s

39、) replaces the former 6.10 and 6.11, with consequent renumbering of the following subclauses. In 6.19, the square brackets are deleted. In 6.27, “Real-time PCR machine(s), i.e. thermal cycler(s),” replaces “Thermal cycler(s)”. In 6.28, “selected real-time PCR” replaces “selected PCR”. In 8.1, “Sampl

40、es arriving already frozen should be defrosted prior to testing.” is inserted as the second sentence. 8.2.3 Is redrafted. In 8.2.4, paragraph 2,”buffer (5.3.5) (for soft fruit samples, add 30 units pectinase from A. niger, or 1 140 units pectinase from A. aculeatus to the buffer) and” replaces “buff

41、er (for soft fruit samples, add 30 units pectinase to the buffer) and”. In 8.2.6, paragraph 2, “and the animal is supported with a rubber block” is added. In 8.2.6, last paragraph, “min at room temperature, decant” replaces “min, decant” In 8.4.2.3, paragraph 1,”using a real-time PCR machine (6.27)”

42、 is added. In 9.4, Note 1 “has a process control virus recovery (equal to the extraction efficiency in matrices other than BMS) of 100 %. For a process control virus RNA standard curve with an idealized slope of 3,32, if the Cqvalue of an undiluted sample RNA well is 1% and therefore acceptable” rep

43、laces “will have an extraction efficiency of 100 %”. The title of Annex B has been expanded to read, “Real-time RT-PCR mastermixes and cycling parameters”. In Table B.1, footnote a, “real-time PCR machines” twice replaces “real-time machines”. In C.1, “This primer set amplifies a product of 173 bp c

44、orresponding to nucleotides 68240 of HAV isolate HM174 43c (GenBank accession number M59809).” is added as paragraph 2. In C.2, “This primer set amplifies a product of 86 bp corresponding to nucleotides 52915376 of Norwalk virus (GenBank accession number M87661).” is added as paragraph 2. In C.3, “T

45、his primer set amplifies a product of 89 bp corresponding to nucleotides 50125100 of Lordsdale virus (GenBank accession number X86557).” is added as paragraph 2. In C.4, “This primer set amplifies a product of 100 bp corresponding to nucleotides 110209 of the deletant mengo virus strain MC0used in t

46、he development of this part of ISO/TS 15216. This corresponds to nucleotides 110270 of the non-deletant mengo virus isolate M (GenBank accession number L22089).” is added as paragraph 2. ISO 2013 All rights reserved vCopyright European Committee for Standardization Provided by IHS under license with

47、 CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-PD CEN ISO/TS 15216-2:2013ISO/TS 15216-2:2013(E) In G.5, “mastermix (if the Cqdifference between EC RNA stock tested with heat-treated and untreated mastermix is 1% and therefore acceptable.NOTE 2 A sample showing

48、 an unacceptable extraction efficiency, but producing an otherwise valid positive result can, if appropriate, be reported as positive as described in Clause 10.9.5 Theoretical limit of detectionThe theoretical limit of detection (tLOD) is the level that constitutes the smallest quantity of target th

49、at is in theory be detected. This corresponds to one genome copy per volume of RNA tested in the target assay, but varies according to the test matrix and the quantity of starting material.For each hard surface, soft fruit, salad vegetable or bottled water sample, the minimum quantity of target in the entire sample that