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Karama M, Lawal OU, Parreira VR, Soni M, Chen Y, Cenci-Goga BT, Grispoldi L, Greyling J, Goodridge L. Draft genome sequences of two Salmonella Uzaramo isolates from poultry in South Africa. Microbiol Resour Announc 2024; 13:e0102623. [PMID: 38099676 DOI: 10.1128/mra.01026-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 11/29/2023] [Indexed: 01/18/2024] Open
Abstract
Salmonella enterica is a zoonotic pathogen and a leading cause of foodborne gastroenteritis in humans. Here, we report the draft genome sequences of two Salmonella Uzaramo isolates, which were isolated from poultry organs during routine post-mortem examination in South Africa. Currently, whole-genome sequences on Salmonella Uzaramo are scanty.
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Affiliation(s)
- Musafiri Karama
- Veterinary Public Health Section, Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria , Onderstepoort, South Africa
| | - Opeyemi U Lawal
- Canadian Research Institute for Food Safety (CRIFS), Department of Food Science, University of Guelph , Guelph, Ontario, Canada
| | - Valeria R Parreira
- Canadian Research Institute for Food Safety (CRIFS), Department of Food Science, University of Guelph , Guelph, Ontario, Canada
| | - Mitra Soni
- Canadian Research Institute for Food Safety (CRIFS), Department of Food Science, University of Guelph , Guelph, Ontario, Canada
| | - Yanhong Chen
- Canadian Research Institute for Food Safety (CRIFS), Department of Food Science, University of Guelph , Guelph, Ontario, Canada
| | - Beniamino T Cenci-Goga
- Veterinary Public Health Section, Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria , Onderstepoort, South Africa
- Department of Veterinary Medicine, Laboratorio di Ispezione Degli Alimenti di Origine Animale, University of Perugia , Perugia, Italy
| | - Luca Grispoldi
- Department of Veterinary Medicine, Laboratorio di Ispezione Degli Alimenti di Origine Animale, University of Perugia , Perugia, Italy
| | - Janita Greyling
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria , Onderstepoort, South Africa
| | - Lawrence Goodridge
- Canadian Research Institute for Food Safety (CRIFS), Department of Food Science, University of Guelph , Guelph, Ontario, Canada
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2
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Wilsmann DE, Furian TQ, Carvalho D, Chitolina GZ, Lucca V, Emery BD, Borges KA, Martins AC, Pontin KP, Salle CTP, de Souza Moraes HL, do Nascimento VP. Antibiofilm activity of electrochemically activated water (ECAW) in the control of Salmonella Heidelberg biofilms on industrial surfaces. Braz J Microbiol 2023; 54:2035-2045. [PMID: 37184738 PMCID: PMC10485189 DOI: 10.1007/s42770-023-01005-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 05/04/2023] [Indexed: 05/16/2023] Open
Abstract
Owing to its antimicrobial activity, electrochemically activated water (ECAW) is a potential alternative to chemical disinfectants for eliminating foodborne pathogens, including Salmonella Heidelberg, from food processing facilities. However, their antibiofilm activity remains unclear. This study aimed to evaluate the antibiofilm activity of ECAW against S. Heidelberg biofilms formed on stainless steel and polyethylene and to determine its corrosive capacity. ECAW (200 ppm) and a broad-spectrum disinfectant (0.2%) were tested for their antibiofilm activity against S. Heidelberg at 25 °C and 37 °C after 10 and 20 min of contact with stainless steel and polyethylene. Potentiostatic polarization tests were performed to compare the corrosive capacity of both compounds. Both compounds were effective in removing S. Heidelberg biofilms. Bacterial counts were significantly lower with ECAW than with disinfectant in polyethylene, regardless the time of contact. The time of contact and the surface significantly influenced the bacterial counts of S. Heidelberg. Temperature was not an important factor affecting the antibiofilm activities of the compounds. ECAW was less corrosive than the disinfectant. ECAW demonstrated a similar or even superior effect in the control of S. Heidelberg biofilms, when compared to disinfectants, reducing bacterial counts by up to 5 log10 CFU cm-2. The corrosion of stainless steel with ECAW was similar to that of commercial disinfectants. This technology is a possible alternative for controlling S. Heidelberg in the food production chain.
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Affiliation(s)
- Daiane Elisa Wilsmann
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Departamento de Medicina Animal, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9090, Porto Alegre, RS, CEP 91540-000, Brazil.
| | - Thales Quedi Furian
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Departamento de Medicina Animal, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9090, Porto Alegre, RS, CEP 91540-000, Brazil
| | - Daiane Carvalho
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Departamento de Medicina Animal, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9090, Porto Alegre, RS, CEP 91540-000, Brazil
| | - Gabriela Zottis Chitolina
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Departamento de Medicina Animal, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9090, Porto Alegre, RS, CEP 91540-000, Brazil
| | - Vivian Lucca
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Departamento de Medicina Animal, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9090, Porto Alegre, RS, CEP 91540-000, Brazil
| | - Brunna Dias Emery
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Departamento de Medicina Animal, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9090, Porto Alegre, RS, CEP 91540-000, Brazil
| | - Karen Apellanis Borges
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Departamento de Medicina Animal, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9090, Porto Alegre, RS, CEP 91540-000, Brazil
| | - Abrahão Carvalho Martins
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Departamento de Medicina Animal, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9090, Porto Alegre, RS, CEP 91540-000, Brazil
| | - Karine Patrin Pontin
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Departamento de Medicina Animal, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9090, Porto Alegre, RS, CEP 91540-000, Brazil
| | - Carlos Tadeu Pippi Salle
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Departamento de Medicina Animal, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9090, Porto Alegre, RS, CEP 91540-000, Brazil
| | - Hamilton Luiz de Souza Moraes
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Departamento de Medicina Animal, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9090, Porto Alegre, RS, CEP 91540-000, Brazil
| | - Vladimir Pinheiro do Nascimento
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Departamento de Medicina Animal, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9090, Porto Alegre, RS, CEP 91540-000, Brazil
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3
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Guan T, Long L, Liu Y, Tian L, Peng Z, He Z. Complete Genome Sequencing and Bacteriocin Functional Characterization of Pediococcus ethanolidurans CP201 from Daqu. Appl Biochem Biotechnol 2023; 195:4728-4743. [PMID: 37285000 DOI: 10.1007/s12010-023-04575-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2023] [Indexed: 06/08/2023]
Abstract
This study aims to sequence the whole genome of Pediococcus ethanolidurans CP201 isolated from Daqu and determine the anti-corrosion ability of bacteriocins on chicken breast. The whole genome sequence information of P. ethanolidurans CP201 was analyzed, and its gene structure and function were explored. It was found that gene1164 had annotations in the NR, Pfam, and Swiss-Prot databases, and was related to bacteriocins. The exogenous expression of the bacteriocin gene Pediocin PE-201 was analyzed based on the pET-21b vector and the host BL21, and the corresponding bacteriocin was successfully expressed under the induction of IPTG. After purification by NI-NTA column, enterokinase treatment, membrane dialysis concentration treatment, and SDS-PAGE electrophoresis, the molecular weight was about 6.5 kDa and the purity was above 90%. By applying different concentrations of bacteriocin to chicken breast with different levels of contamination, the control of pathogenic bacteria, the ordinary contamination level (OC) group, and the high contamination level (MC) group could be completely achieved with 25 mg/L bacteriocin. In conclusion, the bacteriocin produced by the newly isolated CP201 can be applied to the preservation of meat products to prevent the risk of food-borne diseases.
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Affiliation(s)
- Tongwei Guan
- College of Food & Bioengineering, Xihua University, Chengdu, 610039, China.
- Sichuan Provincial Key Laboratory of Food Microbiology, Chengdu, 610039, China.
| | - Liuzhu Long
- College of Food & Bioengineering, Xihua University, Chengdu, 610039, China
| | - Ying Liu
- College of Food & Bioengineering, Xihua University, Chengdu, 610039, China
| | - Lei Tian
- College of Food & Bioengineering, Xihua University, Chengdu, 610039, China
| | - Zhong Peng
- College of Food & Bioengineering, Xihua University, Chengdu, 610039, China
| | - Zongjun He
- Sichuan Tujiu Liquor Co., Ltd., Nanchong, 637000, China
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4
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Hidalgo VM, Babot JD, Fernández MM, Perez Chaia A, Audisio C, Apella MC. Characterization of lactic acid bacteria isolated from the poultry intestinal environment with anti-Salmonella activity in vitro. Braz J Microbiol 2023; 54:435-447. [PMID: 36333643 PMCID: PMC9944612 DOI: 10.1007/s42770-022-00860-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 10/22/2022] [Indexed: 11/07/2022] Open
Abstract
The purpose of this research was the genotypic identification of lactic acid bacteria (LAB), isolated from the gastrointestinal tract (GIT) of healthy adult birds, and the study of their safety regarding antibiotic resistance, physiological and functional properties involved in the colonization of the GIT of poultry, and Salmonella exclusion, as members of a potential mixed probiotic supplement for poultry. The nucleotidic sequence from Lactobacillus crispatus P1, L. animalis L3, and Enterococcus faecium CRL 1385 (ex-J96) showed 100, 99.8, and 99.3% identity with L. crispatus DSM 20584 T, Ligilactobacillus salivarius ATCC 11741 T, and E. faecium ATCC 19434 T, respectively. These strains showed no resistance to relevant antibiotics usually administered to animals proposed by the European Food Safety Authority. They could endure the detrimental conditions of the gastrointestinal tract (pH 2.6 and oxgall 0.1 and 0.4% w/v). In an ex vivo assay, the LAB showed high adherence to the three sections of the GIT, reaching values higher than 70%. The adhesion to mucus was strain-dependent: L. crispatus CRL 1453 evidenced the highest adhesion (> 19%) while Lig. salivarius subsp. salivarius CRL 1417 and E. faecium CRL 1385 adhered to a lower extent (> 9 and 2%, respectively). Moreover, the LAB elicited remarkable anti-Salmonella activity, taking into account that they could inhibit elevated counts of different Salmonella serovars, especially the host-specific serovars S. Gallinarum and S. Pullorum (up to 8 log CFU/mL decrease in Salmonella counts).
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Affiliation(s)
- Victor Maximiliano Hidalgo
- Estación Experimental Agroindustrial Obispo Colombres (EEAOC-Tucumán), San Miguel de Tucumán, Av. William Cross 3150, (T4101XAC), Tucumán, Argentina
| | - Jaime Daniel Babot
- Centro de Referencia para Lactobacilos (CERELA-CCT CONICET NOA Sur), San Miguel de Tucumán, Chacabuco 145, (T4000ILC), Tucumán, Argentina.
| | - María Magdalena Fernández
- Centro de Referencia para Lactobacilos (CERELA-CCT CONICET NOA Sur), San Miguel de Tucumán, Chacabuco 145, (T4000ILC), Tucumán, Argentina
| | - Adriana Perez Chaia
- Centro de Referencia para Lactobacilos (CERELA-CCT CONICET NOA Sur), San Miguel de Tucumán, Chacabuco 145, (T4000ILC), Tucumán, Argentina
- Universidad Nacional de Tucumán, Ayacucho 491, (T4000INI) San Miguel de Tucumán, Tucumán, Argentina
| | - Carina Audisio
- Instituto de Investigaciones para la Industria Química (INIQUI-CCT CONICET Salta-Jujuy), Buenos Aires 177, A4402FDC, Salta, Salta, Argentina
| | - María Cristina Apella
- Centro de Referencia para Lactobacilos (CERELA-CCT CONICET NOA Sur), San Miguel de Tucumán, Chacabuco 145, (T4000ILC), Tucumán, Argentina.
- Universidad Nacional de Tucumán, Ayacucho 491, (T4000INI) San Miguel de Tucumán, Tucumán, Argentina.
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Souza MN, Wolf JM, Zanetti NS, Fonseca ASK, Ikuta N, Lunge VR. Direct Detection and Quantification of Bacterial Pathogens from Broiler Cecal Samples in the Slaughter Line by Real-Time PCR. BRAZILIAN JOURNAL OF POULTRY SCIENCE 2022. [DOI: 10.1590/1806-9061-2021-1505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- MN Souza
- Universidade Luterana do Brasil, Brazil
| | - JM Wolf
- Universidade Luterana do Brasil, Brazil
| | | | | | - N Ikuta
- Simbios Biotecnologia, Brazil
| | - VR Lunge
- Universidade Luterana do Brasil, Brazil; Simbios Biotecnologia, Brazil
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6
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Khalid SA, Hassan RYA, El Nashar RM, El-Sherbiny IM. Voltammetric determination of Salmonella typhimurium in minced beef meat using a chip-based imprinted sensor. RSC Adv 2022; 12:3445-3453. [PMID: 35425402 PMCID: PMC8979253 DOI: 10.1039/d1ra08526c] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Accepted: 01/18/2022] [Indexed: 12/22/2022] Open
Abstract
Early detection of pathogens is necessary for food quality monitoring, and increasing the survival rate of individuals. Conventional microbiological methods used to identify microorganisms, starting from bacterial culture and ending with advanced PCR gene identification, are time-consuming, laborious and expensive. Thus, in this study, a bacterial imprinted polymer (BIP)-based biosensor was designed and fabricated for rapid and selective detection of Salmonella typhimurium. Bio-recognition sites were made by creating template-shaped cavities in the electro-polymerized polydopamine matrices on a gold screen-printed electrode. The overall changes of the sensor, during the imprinting process, have been investigated with cyclic voltammetry, atomic force microscopy and scanning electron microscopy. The assay optimization and validation were accomplished, hence the highest sensitivity and selectivity towards S. typhimurium were achieved. As a result, a very low limit of detection of 47 CFU ml−1, and a limit of quantification of 142 CFU ml−1 were achieved using the newly-developed biosensor. No interference signals were detected when the S. typhimurium was tested in a mixed culture with other non-targeted pathogens such as Staphylococcus aureus, Listeria monocytogenes and Campylobacter jejuni. Eventually, the biosensor was applied to minced beef meat samples offering not only fast detection but also direct determination with no bacterial enrichment steps. A bacterial imprinted polymer (BIP)-based biosensor was designed and fabricated for rapid and selective detection of Salmonella typhimurium in minced beef meat.![]()
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Affiliation(s)
- Shaimaa A. Khalid
- Nanomedicine Research Labs, Center for Materials Science, Zewail City of Science and Technology, 6th October City, 12578 Giza, Egypt
- Food Hygiene Department, Animal Health Research Institute (AHRI), Agricultural Research Center (ARC), Egypt
| | - Rabeay Y. A. Hassan
- Nanomedicine Research Labs, Center for Materials Science, Zewail City of Science and Technology, 6th October City, 12578 Giza, Egypt
- Applied Organic Chemistry Department, National Research Centre (NRC), Dokki, 12622, Giza, Egypt
| | | | - Ibrahim M. El-Sherbiny
- Nanomedicine Research Labs, Center for Materials Science, Zewail City of Science and Technology, 6th October City, 12578 Giza, Egypt
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7
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Recent Evolution and Genomic Profile of Salmonella enterica Serovar Heidelberg Isolates from Poultry Flocks in Brazil. Appl Environ Microbiol 2021; 87:e0103621. [PMID: 34406824 DOI: 10.1128/aem.01036-21] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Salmonella enterica serovar Heidelberg is isolated from poultry-producing regions around the world. In Brazil, S. Heidelberg has been frequently detected in poultry flocks, slaughterhouses, and chicken meat. The goal of the present study was to assess the population structure, recent temporal evolution, and some important genetic characteristics of S. Heidelberg isolated from Brazilian poultry farms. Phylogenetic analysis of 68 S. Heidelberg genomes sequenced here and additional whole-genome data from NCBI demonstrated that all isolates from the Brazilian poultry production chain clustered into a monophyletic group, here called S. Heidelberg Brazilian poultry lineage (SH-BPL). Bayesian analysis defined the time of the most recent common ancestor (tMRCA) as 2004, and the overall population size (Ne) was constant until 2008, when an ∼10-fold Ne increase was observed until circa 2013. SH-BPL presented at least two plasmids with replicons ColpVC (n = 68; 100%), IncX1 (n = 66; 97%), IncA/C2 (n = 65; 95.5%), ColRNAI (n = 43; 63.2%), IncI1 (n = 32; 47%), ColMG828, Col156, IncHI2A, IncHI2, IncQ1, IncX4, IncY, and TrfA (each with n < 4; <4% each). Antibiotic resistance genes were found, with high frequencies of fosA7 (n = 68; 100%), mdf(A) (n = 68; 100%), tet(34) (n = 68; 100%), sul2 (n = 64; 94.1%), and blaCMY-2 (n = 56; 82.3%), along with an overall multidrug resistance (MDR) profile. Ten Salmonella pathogenicity islands (SPI1 to SPI5, SPI9, and SPI11 to SPI14) and 139 virulence genes were also detected. The SH-BPL profile was like those of other previous S. Heidelberg isolates from poultry around the world in the 1990s. In conclusion, the present study demonstrates the recent introduction (2004) and high level of dissemination of an MDR S. Heidelberg lineage in Brazilian poultry operations. IMPORTANCE S. Heidelberg is the most frequent serovar in several broiler farms from the main Brazilian poultry-producing regions. Therefore, avian-source foods (mainly chicken carcasses) commercialized in the country and exported to other continents are contaminated with this foodborne pathogen, generating several national and international economic losses. In addition, isolates of this serovar are usually resistant to antibiotics and can cause human invasive and septicemic infection, representing a public health concern. This study demonstrates the use of whole-genome sequencing (WGS) to obtain epidemiological information for one S. Heidelberg lineage highly spread among Brazilian poultry farms. This information will help to define biosecurity measures to control this important Salmonella serovar in Brazilian and worldwide poultry operations.
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Mascitti AK, Kipper D, Dos Reis RO, da Silva JS, Fonseca ASK, Ikuta N, Tondo EC, Lunge VR. Retrospective whole-genome comparison of Salmonella enterica serovar Enteritidis from foodborne outbreaks in Southern Brazil. Braz J Microbiol 2021; 52:1523-1533. [PMID: 33990934 DOI: 10.1007/s42770-021-00508-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 04/24/2021] [Indexed: 01/14/2023] Open
Abstract
Salmonella enterica serovar Enteritidis is frequently isolated from animal-source foods associated with human salmonellosis outbreaks. This serovar was spread to animal (mainly poultry) farms worldwide in the 1980s, and it is still detected in foods produced in many countries, including Brazil. The present study reports a retrospective genome-wide comparison of S. Enteritidis from foodborne outbreaks in Southern Brazil in the last two decades. Fifty-two S. Enteritidis isolates were obtained from foodborne outbreaks occurring in different cities of the Brazilian southernmost State, Rio Grande do Sul (RS), from 2003 to 2015. Whole-genome sequences (WGS) from these isolates were obtained and comparatively analyzed with 65 additional genomes from NCBI. Phylogenetic and Bayesian analyses were performed to study temporal evolution. Genes related to antibiotic resistance and virulence were also evaluated. The results demonstrated that all S. Enteritidis isolates from Southern Brazil clustered in the global epidemic clade disseminated worldwide originally in the 1980s. Temporal analysis demonstrated that all Brazilian isolates had a tMRCA (time to most recent common ancestor) in 1986 with an effective population size (Ne) increase soon after until 1992, then becoming constant up to now. In Southern Brazil, there was a significant decrease in the spreading of S. Enteritidis in the last decade. In addition, three antibiotic resistance genes were detected in all isolates: aac(6')-Iaa, mdfA, and tet(34). These results demonstrate the high frequency of one only specific S. Enteritidis lineage (global epidemic clade) in foodborne outbreaks from Southern Brazil in the last two decades.
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Affiliation(s)
- Andréa K Mascitti
- Lutheran University of Brazil, 8001, Canoas, Rio Grande Do Sul, 92425-020, Brazil
| | - Diéssy Kipper
- Lutheran University of Brazil, 8001, Canoas, Rio Grande Do Sul, 92425-020, Brazil
| | - Rafael O Dos Reis
- Lutheran University of Brazil, 8001, Canoas, Rio Grande Do Sul, 92425-020, Brazil
| | - Juliana S da Silva
- Lutheran University of Brazil, 8001, Canoas, Rio Grande Do Sul, 92425-020, Brazil
| | | | - Nilo Ikuta
- Simbios Biotechnology, Cachoeirinha, Rio Grande do Sul, Brazil
| | - Eduardo C Tondo
- Institute of Food Science and Technology, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Vagner R Lunge
- Lutheran University of Brazil, 8001, Canoas, Rio Grande Do Sul, 92425-020, Brazil.
- Simbios Biotechnology, Cachoeirinha, Rio Grande do Sul, Brazil.
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9
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Techathuvanan C, D'Souza DH. Propidium monoazide for viable Salmonella enterica detection by PCR and LAMP assays in comparison to RNA-based RT-PCR, RT-LAMP, and culture-based assays. J Food Sci 2020; 85:3509-3516. [PMID: 32964461 DOI: 10.1111/1750-3841.15459] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 08/25/2020] [Accepted: 08/26/2020] [Indexed: 12/13/2022]
Abstract
Rapid and sensitive detection of live/infectious foodborne pathogens is urgently needed in order to prevent outbreaks and food recalls. This study aimed to (1) evaluate the incorporation of propidium monoazide (PMA) into PCR or LAMP assays to selectively detect viable Salmonella Enteritidis following sublethal heat or UV treatment, and autoclave sterilization; and (2) compare the detection of PMA-PCR and PMA-LAMP to DNA-based PCR and LAMP (without PMA), RNA-based RT-PCR and RT-LAMP, and culture-based methods. Nucleic acids (DNA or RNA) from 1-mL S. Enteritidis samples were used for PCR, RT-PCR, LAMP, and RT-LAMP assays. Serially diluted samples were plated on Xylose Lysine Tergitol-4 agar for cultural enumeration. Comparable detection of overnight cultured S. Enteritidis was obtained by PMA-PCR, PCR, and RT-PCR, though 1 to 2 log less sensitive than cultural assays. PMA-LAMP and RT-LAMP showed similar detection of overnight cultures, being 1 to 2 log less sensitive than the LAMP assay, and ∼4 log less than culture-based detection. Autoclaved S. Enteritidis did not test positive by RNA-based methods or PMA-PCR, but PMA-LAMP showed detection of 1 log CFU/mL. PMA-PCR and RT-PCR showed comparable detection of sublethal heat-treated cells to cultural assays, while PMA-LAMP showed 1 to 2 log less detection. Our results suggest that PMA-PCR and PMA-LAMP assays are not suitable for selective viable cell detection after UV treatment. While PMA-LAMP assay needs optimization, PMA-PCR shows promise for live/viable S. Enteritidis detection. PMA-PCR shows potential for routine testing in the food industry with results within 1-day, albeit depending on the inactivation method employed.
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Affiliation(s)
- Chayapa Techathuvanan
- Department of Food Science, University of Tennessee, 2605 River Drive, Knoxville, TN, 37996-4591, U.S.A
| | - Doris Helen D'Souza
- Department of Food Science, University of Tennessee, 2605 River Drive, Knoxville, TN, 37996-4591, U.S.A
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10
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Waldman J, Souza MN, Fonseca ASK, Ikuta N, Lunge VR. Direct detection of Salmonella from poultry samples by DNA isothermal amplification. Br Poult Sci 2020; 61:653-659. [PMID: 32772559 DOI: 10.1080/00071668.2020.1808188] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
1. Salmonellosis is one of the most important diseases in public health and it is usually associated with poultry product consumption. This study aimed to validate rapid methods to detect Salmonella spp. from poultry samples. 2. A DNA isothermal amplification method, previously developed for other matrices, was applied for the specific detection of Salmonella spp. from various samples, including poultry tissues, drag and boot swabs, faeces and feed. A new procedure was validated with Salmonella spp. serotypes and isolates from other enteric bacterial species, as well as naturally contaminated poultry samples. 3. The study demonstrated the successful development and implementation of a procedure, including a DNA isothermal amplification method, for the detection of Salmonella spp. directly from tissues, drag and boot swabs, faeces and feed. The whole procedure can be performed in less than 24 hours and it has been successfully used in a veterinary diagnostic laboratory.
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Affiliation(s)
- J Waldman
- Laboratório de Diagnóstico Molecular, Programa de Pós-Graduação em Biologia Celular e Molecular Aplicada à Saúde, Universidade Luterana do Brasil (ULBRA) , Canoas, Brazil
| | - M N Souza
- Laboratório de Diagnóstico Molecular, Programa de Pós-Graduação em Biologia Celular e Molecular Aplicada à Saúde, Universidade Luterana do Brasil (ULBRA) , Canoas, Brazil
| | | | - N Ikuta
- Laboratório de Diagnóstico Molecular, Programa de Pós-Graduação em Biologia Celular e Molecular Aplicada à Saúde, Universidade Luterana do Brasil (ULBRA) , Canoas, Brazil.,Simbios Biotecnologia , Cachoeirinha, Brazil
| | - V R Lunge
- Laboratório de Diagnóstico Molecular, Programa de Pós-Graduação em Biologia Celular e Molecular Aplicada à Saúde, Universidade Luterana do Brasil (ULBRA) , Canoas, Brazil.,Simbios Biotecnologia , Cachoeirinha, Brazil
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Richards AK, Hopkins BA, Shariat NW. Conserved CRISPR arrays in Salmonella enterica serovar Infantis can serve as qPCR targets to detect Infantis in mixed serovar populations. Lett Appl Microbiol 2020; 71:138-145. [PMID: 32333808 DOI: 10.1111/lam.13296] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 03/27/2020] [Accepted: 03/30/2020] [Indexed: 12/20/2022]
Abstract
Salmonellosis is a leading bacterial cause of foodborne illness, and numerous Salmonella enterica serovars have been responsible for foodborne outbreaks. In the United States outbreaks are often linked to poultry and poultry-related products. The prevalence of Salmonella serovar Infantis has been increasing in poultry processing facilities over the past few years and in 2018 was identified as the causative agent for a large multistate outbreak linked to raw chicken. CRISPR-typing is a subtyping approach based on PCR and the sequencing of two Salmonella loci, CRISPR1 and CRISPR2. CRISPR-typing was used to interrogate 138 recent (2018-2019) isolates and genomes of ser. Infantis. Results show that the CRISPR elements are remarkably conserved in this serovar. The most conserved spacers, and those also unique to ser. Infantis, were used as targets to develop a ser. Infantis-specific qPCR assay. This assay was able to detect ser. Infantis in mixed serovar cultures of Salmonella, down to 0·1% of the population, highlighting the utility of this molecular approach in improving surveillance sensitivity for this important food safety pathogen. SIGNIFICANCE AND IMPACT OF THE STUDY: The incidence of human salmonellosis cases caused by Salmonella enterica serovar Infantis (ser. Infantis) has been increasing, as has its prevalence in broiler chickens, which are a frequent reservoir of Salmonella. A cluster of ser. Infantis genetically linked to an outbreak strain have been identified in numerous processing facilities. A qPCR assay targeting CRISPR elements that are unique to ser. Infantis has been developed and can detect this serovar directly from mixed cultures. This assay is sensitive enough to reveal ser. Infantis within a mixed Salmonella population where it constitutes only 0·1% of the population. The rapid nature of qPCR lends this assay to high-throughput screening of poultry samples to detect this important pathogen.
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Affiliation(s)
- A K Richards
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - B A Hopkins
- International Technical Animal Production and Processing Solutions (iTAPPS), Overland Park, KS, USA
| | - N W Shariat
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
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Tao J, Liu W, Ding W, Han R, Shen Q, Xia Y, Zhang Y, Sun W. A multiplex PCR assay with a common primer for the detection of eleven foodborne pathogens. J Food Sci 2020; 85:744-754. [PMID: 31999364 DOI: 10.1111/1750-3841.15033] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 11/28/2019] [Accepted: 12/03/2019] [Indexed: 11/27/2022]
Abstract
Salmonella enterica, Listeria monocytogenes, Shigella flexneri, Escherichia coli O157:H7, Vibrio parahaemolyticus, Staphylococcus aureus, Vibrio cholerae, Clostridium botulinum type A, Bacillus cereus, Clostridium perfringens Alpha toxin, and Yersinia enterocolitica are 11 common foodborne pathogens. Traditional bacterial culture methods for detecting pathogens are time-consuming and labor-intensive. Multiplex PCR technology, which can detect multiple targets in a single tube, has been increasingly applied to microbial detection due to its high specificity, sensitivity, and fast response. This paper is to establish a multiplex PCR technology mediated by a common primer for the detection of these 11 common foodborne pathogens in order to achieve the goal of nondirectional screening for these 11 common foodborne pathogens. The specificity of the established CP-MPCR detection system was first verified by 100 clinical isolates. The sensitivity of the CP-MPCR detection system was then detected by using cultured bacteria preparations and has been confirmed with a high sensitivity of 103 to 104 CFU/mL, among them, the sensitivity of the CP-MPCR for Vibrio cholerae and S. flexneri can even achieve 102 CFU/mL. Sixty anal swab samples collected from Suzhou CDC and 16 enrichment cultured solutions of food samples collected from the Suzhou Food Inspection and Testing Center were tested using the CP-MPCR system. A total of 32 positive results were detected. PRACTICAL APPLICATION: Food poisoning incidents occur frequently around the world, mainly because of the contamination of food by pathogenic bacteria and serious harm to human health. The method provided in this study can detect 11 foodborne pathogens in food, which can effectively prevent the spread of pathogenic microorganisms. At the same time, for the food poisoning incident that has already occurred, this method can be used for diagnosis to find out the cause.
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Affiliation(s)
- Jing Tao
- Laboratory of Molecular Diagnostics, College of Pharmaceutical Sciences, Soochow Univ., Suzhou, Jiangsu, China
| | - Wanwan Liu
- Laboratory of Molecular Diagnostics, College of Pharmaceutical Sciences, Soochow Univ., Suzhou, Jiangsu, China
| | - Wei Ding
- Laboratory of Molecular Diagnostics, College of Pharmaceutical Sciences, Soochow Univ., Suzhou, Jiangsu, China
| | - Rong Han
- Laboratory of Molecular Diagnostics, College of Pharmaceutical Sciences, Soochow Univ., Suzhou, Jiangsu, China
| | - Qiang Shen
- Suzhou Center for Disease Control and Prevention, Suzhou, Jiangsu, China
| | - Yu Xia
- Suzhou Center for Disease Control and Prevention, Suzhou, Jiangsu, China
| | - Yahan Zhang
- Suzhou Inst. for Food Control, Suzhou, Jiangsu, China
| | - Wanping Sun
- Laboratory of Molecular Diagnostics, College of Pharmaceutical Sciences, Soochow Univ., Suzhou, Jiangsu, China
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