title: Detection of banned ruminant-derived material in industrial feedstuffs by TaqMan real-time PCR Assay.
abstract: A ruminant-specific real-time PCR system was designed and applied for the detection of processed animal protein from ruminants in industrial feedstuffs. The assay includes a primer pair and a TaqMan probe selectively targeting mitochondrial 16S rRNA gene sequences from the ruminant group and another primer-probe set based on the eukaryotic nuclear 18S rRNA gene (positive amplification control). Both ruminant and eukaryotic PCR systems generated short PCR amplicons of 79 and 77 bp, respectively. To evaluate the suitability of the real-time PCR assay for the detection of banned by-products of ruminant origin, 126 feed samples subjected to rendering under current European legislation regulations were analyzed. The assay achieved 100% success in classifying the samples as positive or negative in terms of qualitative ruminant composition, with a detection limit of 0.1%. The quantitative ability of the assay is however restricted by variations in the composition and treatment of the feeds, which affect the amount and quality of amplifiable DNA.
authors.affiliation: Departamento de Nutrición, Bromatología y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad Complutense de Madrid, 28040 Madrid, Spain.
authors.forename: Nicolette
authors.initials: N
authors.lastname: Pegels
authors.forename: Isabel
authors.initials: I
authors.lastname: González
authors.forename: Teresa
authors.initials: T
authors.lastname: García
authors.forename: Rosario
authors.initials: R
authors.lastname: Martín
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D005506:Food Contamination / Q000032:analysis*; D006801:Humans; D021141:Nucleic Acid Amplification Techniques; D016133:Polymerase Chain Reaction / Q000379:methods*; D011328:Prions / Q000032:analysis* / Q000302:isolation & purification; D012336:RNA, Ribosomal, 16S / Q000032:analysis*; D013045:Species Specificity
chemical_list: D011328:Prions; D012336:RNA, Ribosomal, 16S