Detection of live Salmonella enterica in fresh-cut vegetables by a TaqMan-based one-step reverse transcription real-time PCR.

Abstract:

:Fresh-cut produce is at greater risk of Salmonella contamination. Detection and early warning systems play an important role in reducing the dissemination of contaminated products. One-step Reverse Transcription Polymerase Chain Reaction (RT-qPCR) targeting Salmonella tmRNA with or without a 6-h enrichment was evaluated for the detection of Salmonella in fresh-cut vegetables after 6-h storage. LOD of one-step RT-qPCR was 1·0 CFU per ml (about 100 copies tmRNA per ml) by assessed 10-fold serially diluted RNA from 106 CFU per ml bacteria culture. Then, one-step RT-qPCR assay was applied to detect viable Salmonella cells in 14 fresh-cut vegetables after 6-h storage. Without enrichment, this assay could detect 10 CFU per g for fresh-cut lettuce, cilantro, spinach, cabbage, Chinese cabbage and bell pepper, and 102 CFU per g for other vegetables. With a 6-h enrichment, this assay could detect 10 CFU per g for all fresh-cut vegetables used in this study. Moreover, this assay was able to discriminate viable cells from dead cells. This rapid detection assay may provide potential processing control and early warning method in fresh-cut vegetable processing to strengthen food safety assurance. SIGNIFICANCE AND IMPACT OF THE STUDY:Significance and Impact of the Study: Fresh-cut produce is at greater risk of Salmonella contamination. Rapid detection methods play an important role in reducing the dissemination of contaminated products. One-step RT-qPCR assay used in this study could detect 10 CFU per g Salmonella for 14 fresh-cut vegetables with a 6-h short enrichment. Moreover, this assay was able to discriminate viable cells from dead cells. This rapid detection assay may provide potential processing control and early warning method in fresh-cut vegetable processing to strengthen food safety assurance.

journal_name

Lett Appl Microbiol

authors

Miao YJ,Xiong GT,Bai MY,Ge Y,Wu ZF

doi

10.1111/lam.12871

subject

Has Abstract

pub_date

2018-05-01 00:00:00

pages

447-454

issue

5

eissn

0266-8254

issn

1472-765X

journal_volume

66

pub_type

杂志文章
  • Tetracycline-resistance genes in gram-negative isolates from estuarine waters.

    abstract:AIMS:To investigate the diversity and dissemination of tetracycline resistance genes in isolates from estuarine waters. METHODS AND RESULTS:Forty-two out of 164 multi-resistant isolates previously obtained were resistant or less-susceptible to tetracycline, as evaluated by the disc diffusion method. Minimal inhibitory...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-765X.2008.02452.x

    authors: Henriques IS,Fonseca F,Alves A,Saavedra MJ,Correia A

    更新日期:2008-12-01 00:00:00

  • Adhesion capability of first two domains at N terminus of NP_785232 protein and their interaction with a UV-absorbing component from human mucus.

    abstract:AIMS:This work aims to investigate the binding capability of certain domains at N terminus of the protein NP_785232 of Lactobacillus plantarum to Caco-2 cells and to test the usage of affinity chromatography to isolate the human mucus component that interacts with them. METHODS AND RESULTS:Recombinant proteins contain...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-765X.2010.02911.x

    authors: Du L,Liu F,Ju X,Huo G

    更新日期:2010-10-01 00:00:00

  • Induction of intestinal IgA and IgG antibodies preventing adhesion of verotoxin-producing Escherichia coli to Caco-2 cells by oral immunization with liposomes.

    abstract:AIMS:To examine the efficacy of liposome oral administration to induce systemic and mucosal immune responses against verotoxin-producing Escherichia coli (VTEC) and the effect of the induced antibodies on the binding of the bacteria to Caco-2 cells. METHODS AND RESULTS:Mice were immunized orally with VTEC antigen and ...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1046/j.1472-765x.2003.01278.x

    authors: Tana,Watarai S,Isogai E,Oguma K

    更新日期:2003-01-01 00:00:00

  • Comparison of loop-mediated isothermal amplification and real-time PCR for the diagnosis of tuberculous pleurisy.

    abstract:AIMS:Tuberculous pleurisy is an important cause of pleural effusions in areas with a high incidence of tuberculosis. In this study, we developed an IS1081-based LAMP for the detection of Mycobacterium tuberculosis complex and investigated its usefulness in the diagnosis of tuberculous pleurisy. METHODS AND RESULTS:Inv...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-765X.2011.03141.x

    authors: Yang B,Wang X,Li H,Li G,Cao Z,Cheng X

    更新日期:2011-11-01 00:00:00

  • Pulsed electric field inactivation of diarrhoeagenic Bacillus cereus through irreversible electroporation.

    abstract::The physical effects of high-intensity pulsed electric fields (PEF) on the inactivation of diarrhoeagenic Bacillus cereus cells suspended in 0.1% peptone water were examined by transmission electron microscopy (TEM). The levels of PEF-induced microbial cell death were determined by enumeration on tryptone soy yeast ex...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1046/j.1365-2672.2000.00772.x

    authors: Rowan NJ,MacGregor SJ,Anderson JG,Fouracre RA,Farish O

    更新日期:2000-08-01 00:00:00

  • Efficacy of biocides on laboratory-generated Legionella biofilms.

    abstract::Results of biocide efficacy testing on laboratory-generated microbial biofilms containing Legionella bozemanii is presented. These show that chlorine is effective at recommended concentrations in cooling towers; at least 48 h contact between free chlorine and the biofilm is necessary. Of five commercial biocides teste...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-765x.1993.tb00384.x

    authors: Green PN

    更新日期:1993-10-01 00:00:00

  • Presence of sourdough lactic acid bacteria in commercial total mixed ration silage as revealed by denaturing gradient gel electrophoresis analysis.

    abstract:AIMS:To characterize the bacterial communities in commercial total mixed ration (TMR) silage, which is known to have a long bunk life after silo opening. METHODS AND RESULTS:Samples were collected from four factories that produce TMR silage according to their own recipes. Three factories were sampled three times at 1-...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-765X.2010.02915.x

    authors: Wang C,Nishino N

    更新日期:2010-10-01 00:00:00

  • Growth of Salmonella on sprouting alfalfa seeds as affected by the inoculum size, native microbial load and Pseudomonas fluorescens 2-79.

    abstract:AIMS:To investigate the growth of salmonellae on sprouting alfalfa seeds as affected by the inoculum size, microbial load and Pseudomonas fluorescens 2-79. METHODS AND RESULTS:Alfalfa seeds pre-inoculated with < or =10(1)-10(3) CFU g(-1) of salmonellae and with or without Ps. fluorescens 2-79 were sprouted in glass ja...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-765X.2007.02302.x

    authors: Liao CH

    更新日期:2008-02-01 00:00:00

  • Flurbiprofen, a unique non-steroidal anti-inflammatory drug with antimicrobial activity against Trichophyton, Microsporum and Epidermophyton species.

    abstract:AIMS:The objective of this study was to determine the antifungal activity of flurbiprofen against dermatophytes like Trichophyton, Microsporum and Epidermophyton species. METHODS AND RESULTS:Susceptibility tests were performed against dermatophytes like Trichophyton, Microsporum and Epidermophyton species by the micro...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1046/j.1472-765x.2003.01370.x

    authors: Chowdhury B,Adak M,Bose SK

    更新日期:2003-01-01 00:00:00

  • Comparison of three DNA extraction methods for Mycobacterium bovis, Mycobacterium tuberculosis and Mycobacterium avium subsp. avium.

    abstract:AIMS:To compare three methods for DNA extraction from Mycobacterium bovis, Mycobacterium tuberculosis and Mycobacterium avium subsp. avium. METHODS AND RESULTS:The DNA was extracted from mycobacterial cultures using enzymatic extraction, combined bead beating and enzymatic extraction and cetyltrimethylammonium bromide...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-765X.2008.02372.x

    authors: Amaro A,Duarte E,Amado A,Ferronha H,Botelho A

    更新日期:2008-07-01 00:00:00

  • The effect of colony age on PCR fingerprinting.

    abstract::The pattern of DNA fragments produced by the polymerase chain reaction using arbitrary primers is strongly influenced by the age of the colonies sampled. We show that the number, clarity and reproducibility of the bands produced is optimal when very young colonies are sampled. ...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-765x.1993.tb01467.x

    authors: Coutinho HL,Handley BA,Kay HE,Stevenson L,Beringer JE

    更新日期:1993-12-01 00:00:00

  • Isolation and characterization of multidrug-resistant Leclercia species from animal clinical case.

    abstract::Leclercia adecarboxylata, a Gram-negative bacillus of family Enterobacteriaceae, is an uncommonly identified pathogen isolated from environmental and clinical specimens. Most of the human infections are polymicrobial and commonly occur in immunocompromised hosts, although nosocomial infections in immunocompetent hosts...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/lam.12811

    authors: Choudhary M,Choudhary BK,Bhoyar S,Kale SB,Chaudhari SP,Bera BC,Jain A,Barbuddhe SB

    更新日期:2018-01-01 00:00:00

  • Strain-specific detection of orally administered canine jejunum-dominated Lactobacillus acidophilus LAB20 in dog faeces by real-time PCR targeted to the novel surface layer protein.

    abstract:UNLABELLED:Lactobacillus acidophilus LAB20 has potential to be a probiotic strain because it can be present at high numbers in the jejunum of dog. To specifically detect LAB20 from dog faecal samples, a real-time PCR protocol was developed targeting the novel surface (S) layer protein gene of LAB20. The presence of S-l...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/lam.12117

    authors: Tang Y,Saris PE

    更新日期:2013-10-01 00:00:00

  • Antigenicity and N-terminal amino acid sequence of a 35 kDa porin-like protein of Listonella (Vibrio) anguillarum: comparison among different serotypes and other bacterial species.

    abstract::Listonella (Vibrio) anguillarum, an important fish pathogen, is divided into 10 serotypes according to O-antigens present on the outer membrane. However, the biochemical and immunological properties of porin proteins have not been reported. In this study, the antigenicity and N-terminal amino acid sequence of the 35 k...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-765x.1996.tb00195.x

    authors: Suzuki S,Kuroe K,Yasue K,Kusuda R

    更新日期:1996-11-01 00:00:00

  • RAPD analysis of Yersinia enterocolitica.

    abstract::A total of 87 isolates of Yersinia enterocolitica were examined with randomly amplified polymorphic DNA (RAPD) by use of three different primers. Based on the RAPD profiles, the strains could be divided into three major groups: (1) the pathogenic American serotypes, O:8, O:13ab, O:20 and O:21; (2) the pathogenic Europ...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-765x.1994.tb00475.x

    authors: Rasmussen HN,Olsen JE,Rasmussen OF

    更新日期:1994-11-01 00:00:00

  • The incidence, numbers and types of Listeria monocytogenes isolated from farm bulk tank milks.

    abstract::Bulk tank milk from 160 producers was tested for Listeria monocytogenes at three monthly intervals over 1 year. Twenty-five producers were positive, most on a single occasion, only seven were positive on three or more of the four samplings. Listeria monocytogenes numbers were low, usually < 1 ml-1, the highest was 35 ...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-765x.1995.tb00407.x

    authors: Fenlon DR,Stewart T,Donachie W

    更新日期:1995-01-01 00:00:00

  • Cell-wall protein profiles of dairy thermophilic lactobacilli.

    abstract::SDS-PAGE fingerprinting of cell-wall proteins extracted from 119 strains belonging to different species of lactic acid bacteria have been compared. The method of extraction and electrophoretic separation utilized in this work was found to be a reliable and rapid way for characterizing thermophilic lactobacilli species...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1046/j.1472-765x.1997.00235.x

    authors: Gatti M,Fornasari E,Neviani E

    更新日期:1997-11-01 00:00:00

  • Effect of a sublethal high-pressure homogenization treatment on the fatty acid membrane composition of probiotic lactobacilli.

    abstract:UNLABELLED:High-pressure homogenization (HPH) has been proposed to be applied directly to lactic acid bacterial cells at sublethal levels to enhance some functional properties. As the principal target of HPH are the cell surface envelope structures, the aim of this work was to study the effect of a HPH treatment, appli...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/lam.12164

    authors: Tabanelli G,Patrignani F,Gardini F,Vinderola G,Reinheimer J,Grazia L,Lanciotti R

    更新日期:2014-02-01 00:00:00

  • A novel assay for the distribution of pyrithione biocides in bacterial cells.

    abstract::Sodium pyrithione and zinc pyrithione (NaPT and ZnPT, respectively) are widely used as cosmetic preservatives and metal chelating agents. They are commonly assayed using thin layer chromatography (TLC) and high performance liquid chromatography (HPLC). However, a simple quantitative colorimetric assay has not been pre...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1046/j.1472-765x.1998.00376.x

    authors: Dinning AJ,al-Adham IS,Austin P,Collier PJ

    更新日期:1998-07-01 00:00:00

  • Cold storage affects survival and growth of Erwinia amylovora on the calyx of apple.

    abstract:AIMS:To determine the effect of cold storage on the survival of Erwinia amylovora. METHODS AND RESULTS:The survival of E. amylovora was assessed during storage at 2 degrees C. Populations of E. amylovora inoculated into phosphate-buffered saline remained static, whereas in nutrient media populations increased at low t...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1046/j.1472-765x.2003.01407.x

    authors: Taylor RK,Hale CN

    更新日期:2003-01-01 00:00:00

  • The M. tuberculosis antigen 85 complex and mycolyltransferase activity.

    abstract:AIMS:The antigen 85 complex (Ag85) from Mycobacterium tuberculosis consists of three abundantly secreted proteins (FbpA, FbpB and FbpC2) which play a key role in the pathogenesis of tuberculosis and also exhibit cell wall mycolyltransferase activity. A related protein with similarity to the Ag85 complex was recently an...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1046/j.1472-765x.2002.01091.x

    authors: Kremer L,Maughan WN,Wilson RA,Dover LG,Besra GS

    更新日期:2002-01-01 00:00:00

  • Development of a method for direct extraction of viral RNA from bivalve molluscs.

    abstract::The detection of foodborne viruses in bivalve molluscs is a challenging procedure in relation to low virus concentration and to the presence of significant RT-PCR inhibitors. The aim of this study was the development of an efficient direct extraction method for foodborne viral RNA from bivalve molluscs. Using Mengovir...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/lam.13065

    authors: Quang Le H,Suffredini E,Tien Pham D,Kim To A,De Medici D

    更新日期:2018-11-01 00:00:00

  • Pyruvate relieves the necessity of high induction levels of catalase and enables Campylobacter jejuni to grow under fully aerobic conditions.

    abstract:AIMS:Several cases of campylobacteriosis reported worldwide seemingly conflict with the strict growth requirements and sensitivity to environmental stress of Campylobacter jejuni. In this study, the need for a micro-aerobic environment [dissolved oxygen tension (DOT): 0.1-90%; 100% air saturation)] and the adaptive res...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-765X.2008.02326.x

    authors: Verhoeff-Bakkenes L,Arends AP,Snoep JL,Zwietering MH,de Jonge R

    更新日期:2008-03-01 00:00:00

  • Nanoporous anodic alumina reduces Staphylococcus biofilm formation.

    abstract::Staphylococcus epidermidis and Staphylococcus aureus, two bacterial strains commonly associated with biofilm-related medical infections and food poisoning, can rapidly colonize biotic and abiotic surfaces. The present study investigates the ability of anodic alumina surfaces with nanoporous surface topography to minim...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/lam.13201

    authors: Feng G,Cheng Y,Worobo RW,Borca-Tasciuc DA,Moraru CI

    更新日期:2019-10-01 00:00:00

  • Isolation of endophytic diazotroph Pantoea agglomerans and nondiazotroph Enterobacter asburiae from sweetpotato stem in Japan.

    abstract:AIMS:To isolate and identify diazotrophic endophytes in the stem of Japanese sweetpotato cv. Koganesengan. METHODS AND RESULTS:Surface-sterilized and thinly sliced (1-2 mm) sweetpotato stem samples were incubated in test tubes with semi-solid modified Rennie (MR) medium. The test tubes were assayed for acetylene reduc...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1046/j.1472-765x.2003.01434.x

    authors: Asis CA Jr,Adachi K

    更新日期:2004-01-01 00:00:00

  • Detection and discrimination of four Aspergillus section Nigri species by PCR.

    abstract::Species of Aspergillus section Nigri are not easily distinguished by traditional morphological techniques, and typically are identified by DNA sequencing methods. We developed four PCR primers to distinguish between Aspergillus niger, Aspergillus welwitschiae, Aspergillus carbonarius and Aspergillus tubingensis, based...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/lam.12358

    authors: Palumbo JD,O'Keeffe TL

    更新日期:2015-02-01 00:00:00

  • Optimization of physical parameters for exo-biopolymer production in submerged mycelial cultures of two entomopathogenic fungi Paecilomyces japonica and Paecilomyces tenuipes.

    abstract:AIMS:In the present study, two different optimization techniques were used to determine the suitable operating parameters for exo-biopolymer production in submerged mycelial cultures of two entomopathogenic fungi Paecilomyces japonica and Paecilomyces tenuipes. METHODS AND RESULTS:First, the rotating simplex method, a...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-765X.2006.01884.x

    authors: Xu CP,Sinha J,Bae JT,Kim SW,Yun JW

    更新日期:2006-05-01 00:00:00

  • Structural characterization of Tn916-like element in Streptococcus parauberis serotype II strains isolated from diseased Japanese flounder.

    abstract:AIMS:To screen for the existence and determine the structure of Tn916-like element in Streptococcus parauberis serotype II strains isolated from cultured Japanese flounder in western Japan. METHODS AND RESULTS:In this study, the structure of Tn916-like element and the flanking regions were characterized by polymerase ...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-765X.2009.02609.x

    authors: Meng F,Kanai K,Yoshikoshi K

    更新日期:2009-06-01 00:00:00

  • Effect of NaOH (caustic wash) on the viability, surface characteristics and adhesion of spores of a Geobacillus sp. isolated from a milk powder production line.

    abstract:AIM:To investigate the viability, surface characteristics and ability of spores of a Geobacillus sp. isolated from a milk powder production line to adhere to stainless steel surfaces before and after a caustic (NaOH) wash used in clean-in-place regimes. METHODS AND RESULTS:Exposing sessile spores to 1% NaOH at 65°C fo...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-765X.2010.02970.x

    authors: Brent Seale R,Flint SH,James McQuillan A,Bremer PJ

    更新日期:2011-02-01 00:00:00

  • Microbial population dynamics in the faeces of wood-eating loricariid catfishes.

    abstract:UNLABELLED:Catfishes of the genus Panaque are known for their ability to feed on wood and hence to process cellulose fibres in their digestive systems. The paper industry uses cellulose fibres and thus has an interest in exploiting this property biomimetically: it could be employed as a pretreatment to lessen the energ...

    journal_title:Letters in applied microbiology

    pub_type: 杂志文章

    doi:10.1111/lam.12061

    authors: Di Maiuta N,Schwarzentruber P,Schenker M,Schoelkopf J

    更新日期:2013-06-01 00:00:00