Title: Organization and ELISA-based results of the first proficiency testing to evaluate the ability of European Union Laboratories to detect Staphylococcal Enterotoxin type B (SEB) in buffer and milk
Citation: TOXINS vol. 8 no. 9 p. 268
Publisher: MDPI AG
Publication Year: 2016
JRC N°: JRC102942
ISSN: 2072-6651
URI: https://www.mdpi.com/2072-6651/8/9/268
DOI: 10.3390/toxins8090268
Type: Articles in periodicals and books
Abstract: The aim of this work was to organize the first proficiency test (PT) dedicated to staphylococcal enterotoxin B (SEB) detection in milk and buffer solutions. This paper describes the organization of the PT trial according to EN ISO 17043 requirements. Characterization of the SEB stock solution was performed using SDS-PAGE and SE-specific ELISA, and amino acid analysis was used to assign its protein concentration. The solution was then used to prepare six PT materials (four milk and two buffer batches) at a ng/g toxin level, which included one blank and one SEA-containing milk as specificity control. Suitable material homogeneity and stability were assessed using screening and quantitative ELISAs. Among the methods used by the participants, ELISA-based methods demonstrated their efficiency for the detection of SEB in both simple and complex matrices. The results serve as a basis for further improving the detection capabilities in expert laboratories and can therefore be considered as a contribution to biopreparedness.
JRC Directorate:Health, Consumers and Reference Materials

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