title: Flow cytometry based rapid duplexed immunoassay for fusarium mycotoxins.
abstract: At small food processing facilities, the most frequently used test to determine if grain-derived mycotoxin concentrations are compliant with legal limits is the enzyme-linked immunosorbent assay (ELISA). Each kit is designed to detect one of the six dangerous mycotoxins. With the increasing occurrence of coinfection of grain with multiple-mycotoxins in the field and/or during storage, ELISA is no longer a cost effective best assay option. With ELISA, each species of mycotoxin requires different sample preparation/extraction and a 45 min incubation. The alternative multiplexed assay presented here, the competitive fluorescent microsphere immunoassay (CFIA), follows current food safety standards. It handles several toxins simultaneously with a single universal extraction protocol. The authors' objective was to modify an existing commercial CFIA kit developed for bench top flow cytometry and extend its utility for point-of-need (PON) applications. The accelerated protocol offers over 60% reduction in total processing time and it detects dual mycotoxin contamination simultaneously. The observed enhanced binding kinetics equations reported here utilizing suspended solid phase particles in liquid phase, are also supported by published theoretical calculations. In the near future portable cytometry may bring rapid multiplexed PON testing to assure the safety of small food processing installations. © 2016 International Society for Advancement of Cytometry.
authors.affiliation: Soft Flow Hungary Ltd, Pécs, Hungary.
authors.forename: Árpád
authors.initials: Á
authors.lastname: Czéh
authors.affiliation: Department of Nutrition, Szent István University, Gödöllő, Hungary.
authors.forename: Miklós
authors.initials: M
authors.lastname: Mézes
authors.affiliation: African Institute for Mathematical Sciences, Mbour, Senegal.
authors.forename: Francis
authors.initials: F
authors.lastname: Mandy
authors.affiliation: Soft Flow Hungary Ltd, Pécs, Hungary.
authors.forename: Zsuzsanna
authors.initials: Z
authors.lastname: Szőke
authors.affiliation: Soft Flow Hungary Ltd, Pécs, Hungary.
authors.forename: György
authors.initials: G
authors.lastname: Nagyéri
authors.affiliation: Soft Flow Hungary Ltd, Pécs, Hungary.
authors.forename: Noémi
authors.initials: N
authors.lastname: Laufer
authors.affiliation: Soft Flow Hungary Ltd, Pécs, Hungary.
authors.forename: Balázs
authors.initials: B
authors.lastname: Kőszegi
authors.affiliation: Soft Flow Hungary Ltd, Pécs, Hungary.
authors.forename: Tamás
authors.initials: T
authors.lastname: Koczka
authors.affiliation: Department of General and Physical Chemistry, University of Pécs, Pécs, Hungary.
authors.forename: Sándor
authors.initials: S
authors.lastname: Kunsági-Máté
authors.affiliation: Soft Flow Hungary Ltd, Pécs, Hungary.
authors.forename: György
authors.initials: G
authors.lastname: Lustyik
mesh_terms: D002523:Edible Grain / Q000737:chemistry / Q000382:microbiology; D005434:Flow Cytometry / Q000379:methods*; D060585:Fusariosis / Q000378:metabolism; D005670:Fusarium / Q000737:chemistry / Q000472:pathogenicity; D006801:Humans; D007118:Immunoassay / Q000379:methods*; D009183:Mycotoxins / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D009183:Mycotoxins
keywords: accelerated competitive fluorescent microsphere immunoassay; accelerated incubation time; enzyme-linked immunosorbent assay; fungal coinfection; fusarium toxins; myco-epidemiology; point-of-need testing; poly-mycotoxins; suspended solid/liquid phase immunoassay