Development of a Polyclonal Antibody-Based Sandwich Enzyme-Linked Immunosorbent Assay for the Detection of Spores of Alicyclobacillus acidoterrestris in Various Fruit Juices

被引：12
作者：
Mast, Sophia [1 ]
Dietrich, Richard [1 ]
Didier, Andrea [1 ]
Maertlbauer, Erwin [1 ]
机构：
[1] Univ Munich, Fac Vet Med, Dept Vet Sci, Schonleutnerstr 8, D-85764 Oberschleissheim, Germany
来源：
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 2016年 / 64卷 / 02期
关键词：
Alicyclobacillus acidoterrestris; sandwich ELISA; spores; polyclonal antibody; detection; fruit juice; immunofluorescence; APPLE JUICE; PROCESSING ENVIRONMENT; BACILLUS-SUBTILIS; RAPID DETECTION; ORANGE JUICE; IDENTIFICATION; SPP; SPOILAGE; SEQUENCE; STRAINS;
D O I：
10.1021/acs.jafc.5b03841
中图分类号：
S [农业科学];
学科分类号：
09 ;
摘要：
A polyclonal rabbit antibody-based sandwich ELISA for the rapid and specific detection of spores of Alicyclobacillus acidoterrestris was established. The reactivity of the antisera with spores was confirmed by immunofluorescence. For a thorough evaluation of the ELISA, 61 strains and isolates of Alicyclobacillus spp. were characterized regarding their guaiacol production ability and genetic variability. The ELISA was highly sensitive, the detection limits were isolate-dependent and ranged from 2.1 x 10(3) - 3.8 x 10(4) spores/mL, except for one isolate, for which a slightly lower sensitivity (5 x 10(5) spores/mL) was observed. Inclusivity tests revealed that the ELISA reacts with all tested A. acidoterrestris, while no cross-reactions with spores of 30 strains of Bacillus spp. and Clostridium spp. were observed. Further on, the assay applicability was tested with orange, apple (clear and unfiltered), tomato, pink grapefruit, pear, and white grape juices. Juices were inoculated with 1 or 10 spores/mL of A. acidoterrestris. After enrichment for 48 h, the established ELISA enabled the reliable and reproducible detection of contaminated samples. The enriched samples could be applied directly to the assay, underlining the robustness of the developed ELISA method.
引用
收藏
页码：497 / 504
页数：8
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