title: TECRA Listeria Visual Immunoassay (TLVIA) for detection of Listeria in foods: collaborative study.
abstract: A collaborative study involving 26 laboratories and 5 food types was performed to compare the TECRA Listeria Visual Immunoassay (TLVIA) with standard culture methods. Three foods (lettuce, ice cream, and fish fillets), under the jurisdiction of the U.S. Food and Drug Administration, and 2 foods (cooked chicken and cooked ground turkey), under the jurisdiction of the U.S. Department of Agriculture, were used to determine the effectiveness of the TLVIA. Of the 900 samples tested, 300 were inoculated with low levels (1-5 cells/25 g) of Listeria spp. and 300 were inoculated with high levels of Listeria spp. (10-50 cells/25 g). Method agreement between the conventional culture methods and TLVIA (visual) was 94.7%. Method agreement between the conventional culture methods and TLVIA (reader) was 93.6%. The colorimetric polyclonal enzyme immunoassay (TLVIA) for detection of Listeria in foods has been adopted first action by AOAC INTERNATIONAL.
authors.affiliation: Q Laboratories, Inc., Cincinnati, OH 45214, USA.
authors.forename: M T
authors.initials: MT
authors.lastname: Knight
authors.forename: M C
authors.initials: MC
authors.lastname: Newman
authors.forename: M J
authors.initials: MJ
authors.lastname: Benzinger
authors.forename: J R
authors.initials: JR
authors.lastname: Agin
authors.forename: M
authors.initials: M
authors.lastname: Ash
authors.forename: P
authors.initials: P
authors.lastname: Sims
authors.forename: D
authors.initials: D
authors.lastname: Hughes
mesh_terms: D000818:Animals; D000906:Antibodies; D002645:Chickens; D003124:Colorimetry; D003470:Culture Media; D005396:Fish Products / Q000382:microbiology; D005516:Food Microbiology; D007054:Ice Cream / Q000382:microbiology; D007124:Immunoenzyme Techniques; D018545:Lactuca / Q000382:microbiology; D008087:Listeria / Q000254:growth & development / Q000302:isolation & purification*; D008460:Meat / Q000382:microbiology; D012016:Reference Values; D015203:Reproducibility of Results; D014422:Turkeys
chemical_list: D000906:Antibodies; D003470:Culture Media