Development of loop-mediated isothermal amplification (LAMP) assay for rapid and sensitive identification of ostrich meat

PLoS One. 2014 Jun 25;9(6):e100717. doi: 10.1371/journal.pone.0100717. eCollection 2014.

Abstract

Animal species identification is one of the primary duties of official food control. Since ostrich meat is difficult to be differentiated macroscopically from beef, therefore new analytical methods are needed. To enforce labeling regulations for the authentication of ostrich meat, it might be of importance to develop and evaluate a rapid and reliable assay. In the present study, a loop-mediated isothermal amplification (LAMP) assay based on the cytochrome b gene of the mitochondrial DNA of the species Struthio camelus was developed. The LAMP assay was used in combination with a real-time fluorometer. The developed system allowed the detection of 0.01% ostrich meat products. In parallel, a direct swab method without nucleic acid extraction using the HYPLEX LPTV buffer was also evaluated. This rapid processing method allowed detection of ostrich meat without major incubation steps. In summary, the LAMP assay had excellent sensitivity and specificity for detecting ostrich meat and could provide a sampling-to-result identification-time of 15 to 20 minutes.

MeSH terms

  • Animals
  • Cytochromes b / genetics
  • DNA, Mitochondrial / genetics
  • Food Quality
  • Limit of Detection
  • Meat / analysis*
  • Nucleic Acid Amplification Techniques / methods*
  • Phylogeny
  • Struthioniformes / classification
  • Struthioniformes / genetics*
  • Time Factors

Substances

  • DNA, Mitochondrial
  • Cytochromes b

Grants and funding

The authors have no support or funding to report.