Cell blocking: An enhancement of foodborne pathogen detection by fluorescent signals of recombinant yeasts

Anal Biochem. 2020 Oct 1:606:113856. doi: 10.1016/j.ab.2020.113856. Epub 2020 Aug 2.

Abstract

Cell blocking (CB) technique has been widely applied in many studies since the last century. In our research, this technique was mostly used to study the enhancement of the vacuolar response-based system that could detect Shigella sp. and Salmonella sp. investigated in previous studies. The recombinant yeast cells were blocked by mixing with agarose gel on a 96-wells plate, then storing this plate in -80 °C before using. The optimal conditions for the new system, such as agarose concentration, maximum storage time, were also established. Finally, the efficiency of the vacuolar response-based system was improved, and this system could be used as a portable detector for the foodborne pathogen.

Keywords: Fluorescent proteins; Foodborne pathogen detection; Salmonella sp.; Shigella sp.; Yeast vacuoles; cell blocking.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Fluorescent Dyes / analysis
  • Fluorometry / methods*
  • Food Microbiology / methods
  • Foodborne Diseases / microbiology
  • Saccharomyces cerevisiae / metabolism*
  • Salmonella / chemistry
  • Salmonella / isolation & purification*
  • Shigella / chemistry
  • Shigella / isolation & purification*
  • Vacuoles / chemistry
  • Vacuoles / microbiology

Substances

  • Fluorescent Dyes