Preparation of Proficiency Test Items for Salmonella spp. Detection in Cheese Matrix
DOI:
https://doi.org/10.3395/2317-269x.00367Keywords:
est material, Proficiency assay, Cheese, Salmonella spp.Abstract
The participation of analytical laboratories in proficiency testing allows the verification of the reliability of results in analysis of quality control. The aim of this study was to produce a batch of test items (TI) to be used in a proficiency assay for Salmonella spp. research in a cheese matrix. Ultrafiltered Minas cheese was used as the matrix and spiked with a strain of Salmonella Enteritidis. Trehalose was used as cryoprotectant, and freeze-drying was used as the preservation technique. The batch was evaluated for vacuum verification, homogeneity study, and long-term stability testing at temperatures of -70ºC (reference temperature) and -20ºC (storage temperature). The batch was also evaluated for short-term stability at temperatures of 4ºC, 25ºC, and 35ºC (transport temperatures). The results showed vacuum in 95.6% of the bottles, and the batch was considered sufficiently homogeneous. TI remained stable at -70ºC for more than 360 days and at -20ºC for more than 160 days. TI was shown to be stable for up 6 days at 4ºC and 25ºC but not at 35ºC. It is concluded that the methodology used was satisfactory for this TI production for Salmonella spp. research in a cheese matrix.Downloads
Downloads
Additional Files
Published
Issue
Section
License
Copyright (c) 2015 Health Surveillance under Debate: Society, Science & Technology (Vigilância Sanitária em Debate: Sociedade, Ciência & Tecnología) – “Visa em Debate”
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
COPYRIGHT ALLOWANCE The author (s) hereinafter designated as the ASSIGNOR hereby assign and transfer, free of charge, the ownership of the copyrights related to this ARTICLE to the Vigilância Sanitária em Debate: Sociedade, Ciência & Tecnologia (Health Surveillance under Debate: Society, Science & Technology) – Visa em Debate, represented by FUNDAÇÃO OSWALDO CRUZ, established at Av. Brasil, nº 4365, Manguinhos, Rio de Janeiro, RJ, Brazil, CEP 21045-900, under the conditions set out below: (a) The terms and conditions set forth in this Agreement shall apply to the following: 1. The ASSIGNOR declares that they s(he) is (are) the author (s) and owner (s) of the copyrighted property of the ARTICLE submitted. 2. The ASSIGNOR declares that the ARTICLE does not infringe the copyrights and / or other property rights of third parties, that the disclosure of images (if any) has been authorized and that they s(he) assume(s) full moral and / or property liability for its content, before third parties. 3. THE ASSIGNOR assigns and transfers all copyrights relating to the ARTICLE to the ASSIGNEE, especially the rights of editing, publication, translation into another language and reproduction by any process or technique. The ASSIGNEE becomes the exclusive owner of the rights related to the ARTICLE, and any reproduction, totally or partially, is prohibited in any other means of publicity, printed or electronic, without prior written authorization from the ASSIGNEE. 4. The assignment is free and, therefore, there will be no remuneration for the use of the ARTICLE by the ASSIGNEE.
