Polymerase chain reaction (PCR) for the detection of Salmonella in artificially inoculated chicken meat

Rev Inst Med Trop Sao Paulo. 2001 Sep-Oct;43(5):247-50. doi: 10.1590/s0036-46652001000500002.

Abstract

The aim of this study was to develop a polymerase chain reaction (PCR) protocol for the detection of Salmonella in artificially contaminated chicken meat. Tests were performed with different dilutions of Salmonella Typhimurium or Salmonella Enteritidis cells (10(-7), 10(-8) or 10(-9) CFU/mL) inoculated in chicken meat samples, in order to establish the limits of detection, incubation times (0, 6, 8 and 24 hours of pre-enrichment in PBW 1%) and three DNA extraction protocols (phenol-chloroform, thermal treatment and thermal treatment and Sephaglass). The assay was able to detect until 10(-9) CFU/mL of initial dilution of Salmonella cells inoculated in chicken meat, which allows detection of Salmonella within 48 hours, including 24 hours of pre-enrichment and using the phenol-chloroform DNA extraction protocol. As the results are obtained in a shorter time period than that of microbiological culture, this procedure will be useful in the methodology for detection of Salmonella in chicken.

Publication types

  • Research Support, Non-U.S. Gov't
  • Validation Study

MeSH terms

  • Animals
  • Chickens / microbiology*
  • DNA, Bacterial / analysis
  • DNA, Bacterial / isolation & purification*
  • Polymerase Chain Reaction
  • Poultry Products / microbiology*
  • Salmonella / isolation & purification*
  • Time Factors

Substances

  • DNA, Bacterial