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Zhang R, Wang Y, Wang X, Ren H, Du J, Yang Y, Hu X, Shi R, Zhang B, Li C, Lu S, Li Y, Liu Z, Hu P. Visual fluorescence detection of Listeria monocytogenes with CRISPR-Cas12a aptasensor. Anal Bioanal Chem 2024:10.1007/s00216-024-05497-1. [PMID: 39212695 DOI: 10.1007/s00216-024-05497-1] [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: 06/18/2024] [Revised: 07/28/2024] [Accepted: 08/12/2024] [Indexed: 09/04/2024]
Abstract
Listeria monocytogenes (L. monocytogenes) is a prevalent food-borne pathogen that can cause listeriosis, which manifests as meningitis and other symptoms, potentially leading to fatal outcomes in severe cases. In this study, we developed an aptasensor utilizing carboxylated magnetic beads and Cas12a to detect L. monocytogenes. In the absence of L. monocytogenes, the aptamer maintains its spatial configuration, keeping the double-stranded DNA attached and preventing the release of a startup template and activation of Cas12a's trans-cleavage capability. Conversely, in the presence of L. monocytogenes, the aptamer undergoes a conformational change, releasing the double-stranded DNA to serve as a startup template, thereby activating the trans-cleavage capability of Cas12a. Consequently, as the concentration of L. monocytogenes increases, the observable brightness in a blue light gel cutter intensifies, leading to a rise in fluorescence intensity difference compared to the control. This Cas12a aptasensor demonstrates excellent sensitivity towards L. monocytogenes, with a lowest detection limit (LOD) of 57.15 CFU/mL and a linear range of 4×102 to 4×107 CFU/mL (R2=0.9858). Notably, the proposed Cas12a aptasensor exhibited outstanding selectivity and recovery in beef samples, and could be employed for precise monitoring. This Cas12a aptasensor not only provides a novel fluorescent and visual rapid detection method for L. monocytogenes but also offers simplicity, speed, and stability compared to previous detection methods. Furthermore, it is suitable for on-site detection of beef samples.
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Affiliation(s)
- Runze Zhang
- Department of Food and Biological Sciences, Yanbian University, No. 977, GongYuan Street, Yanji, 133002, Jilin, China
| | - Yuzhu Wang
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Xiaoxu Wang
- Institute of Special Animal and Plant Sciences of Chinese Academy of Agricultural Sciences, Changchun, 130112, Jilin, China
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730000, China
| | - Honglin Ren
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Junzheng Du
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730000, China
| | - Yongjie Yang
- Department of Food and Biological Sciences, Yanbian University, No. 977, GongYuan Street, Yanji, 133002, Jilin, China
| | - Xueyu Hu
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Ruoran Shi
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Bo Zhang
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Chengwei Li
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Shiying Lu
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Yansong Li
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Zengshan Liu
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Pan Hu
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China.
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Rodrigues IC, Ribeiro-Almeida M, Silveira L, Prata JC, de Carvalho AP, Roque C, Gomes JP, Borges V, Pista Â, Martins da Costa P. Unveiling a Listeria monocytogenes Outbreak in a Rabbit Farm: Clinical Manifestation, Antimicrobial Resistance, Genomic Insights and Environmental Investigation. Microorganisms 2024; 12:785. [PMID: 38674729 PMCID: PMC11051769 DOI: 10.3390/microorganisms12040785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 04/08/2024] [Accepted: 04/10/2024] [Indexed: 04/28/2024] Open
Abstract
Listeria monocytogenes poses a threat to both human and animal health. This work describes an L. monocytogenes outbreak in a Portuguese rabbit farm, detailing the isolates' clinical manifestations, necropsy findings, and phenotypic and genomic profiles. Clinical signs, exclusively observed in does, included lethargy and reproductive signs. Post-mortem examination of does revealed splenomegaly, hepatomegaly with a reticular pattern, pulmonary congestion, and haemorrhagic lesions in the uterus, with thickening of the uterine wall and purulent greyish exudates. Positive L. monocytogenes samples were identified in fattening and maternity units across different samples, encompassing does and environmental samples. Core-genome Multi Locus Sequence Typing (cgMLST) analysis confirmed the outbreak, with the 16 sequenced isolates (lineage II, CC31, and ST325) clustering within a ≤2 allelic difference (AD) threshold. Antimicrobial susceptibility testing for five antibiotics revealed that 15 out of 19 outbreak isolates were resistant to sulfamethoxazole-trimethoprim (SXT). Concordantly, all SXT-resistant sequenced isolates were found to exclusively harbour a plasmid containing a trimethoprim-resistance gene (dfrD), along with loci linked to resistance to lincosamides (lnuG), macrolides (mphB), and polyether ionophores (NarAB operon). All sequenced outbreak isolates carried the antibiotic resistance-related genes tetM, fosX, lin, norB, lmrB, sul, and mprF. The outbreak cluster comprises isolates from does and the environment, which underscores the ubiquitous presence of L. monocytogenes and emphasizes the importance of biosecurity measures. Despite limited data on listeriosis in rabbit farming, this outbreak reveals its significant impact on animal welfare and production.
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Affiliation(s)
- Inês C. Rodrigues
- School of Medicine and Biomedical Sciences, University of Porto (ICBAS-UP), Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (I.C.R.); (M.R.-A.); (J.C.P.); (A.P.d.C.)
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), Terminal de Cruzeiros do Porto, de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal
| | - Marisa Ribeiro-Almeida
- School of Medicine and Biomedical Sciences, University of Porto (ICBAS-UP), Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (I.C.R.); (M.R.-A.); (J.C.P.); (A.P.d.C.)
- UCIBIO—Applied Molecular Biosciences Unit, REQUIMTE, Laboratory of Microbiology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, 4099-002 Porto, Portugal
| | - Leonor Silveira
- National Reference Laboratory for Gastrointestinal Infections, Department of Infectious Diseases, National Institute of Health Doutor Ricardo Jorge, Avenida Padre Cruz, 1649-016 Lisbon, Portugal; (L.S.); (C.R.); (Â.P.)
| | - Joana C. Prata
- School of Medicine and Biomedical Sciences, University of Porto (ICBAS-UP), Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (I.C.R.); (M.R.-A.); (J.C.P.); (A.P.d.C.)
- i4HB—Institute for Health and Bioeconomy, University Institute of Health Sciences, Advanced Polytechnic and University Cooperative (CESPU), 4585-116 Gandra, Portugal
- UCIBIO—Applied Molecular Biosciences Unit, Translational Toxicology Research Laboratory, University Institute of Health Sciences (1H-TOXRUN, IUCS-CESPU), 4585-116 Gandra, Portugal
| | - André Pinto de Carvalho
- School of Medicine and Biomedical Sciences, University of Porto (ICBAS-UP), Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (I.C.R.); (M.R.-A.); (J.C.P.); (A.P.d.C.)
- NANTA Portugal, S.A., Rua da Estação, N° 157, 4630-221 Marco de Canaveses, Portugal
| | - Carla Roque
- National Reference Laboratory for Gastrointestinal Infections, Department of Infectious Diseases, National Institute of Health Doutor Ricardo Jorge, Avenida Padre Cruz, 1649-016 Lisbon, Portugal; (L.S.); (C.R.); (Â.P.)
| | - João Paulo Gomes
- Genomics and Bioinformatics Unit, Department of Infectious Diseases, National Institute of Health Doutor Ricardo Jorge, Avenida Padre Cruz, 1649-016 Lisbon, Portugal; (J.P.G.); (V.B.)
- Veterinary and Animal Research Centre (CECAV), Faculty of Veterinary Medicine, Lusófona University, 1749-024 Lisbon, Portugal
| | - Vítor Borges
- Genomics and Bioinformatics Unit, Department of Infectious Diseases, National Institute of Health Doutor Ricardo Jorge, Avenida Padre Cruz, 1649-016 Lisbon, Portugal; (J.P.G.); (V.B.)
| | - Ângela Pista
- National Reference Laboratory for Gastrointestinal Infections, Department of Infectious Diseases, National Institute of Health Doutor Ricardo Jorge, Avenida Padre Cruz, 1649-016 Lisbon, Portugal; (L.S.); (C.R.); (Â.P.)
| | - Paulo Martins da Costa
- School of Medicine and Biomedical Sciences, University of Porto (ICBAS-UP), Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (I.C.R.); (M.R.-A.); (J.C.P.); (A.P.d.C.)
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), Terminal de Cruzeiros do Porto, de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal
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Dong Z, Sun Y, Cao Q, Liu H, Liu Y, Cao Q, Wei H, Song C, Gou H, Xue H. Prevalence and Biological Characteristics of Listeria Species Isolated from Livestock and Poultry Meat in Gansu Province, China. Pol J Microbiol 2023; 72:11-20. [PMID: 36929888 DOI: 10.33073/pjm-2023-002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 12/27/2022] [Indexed: 03/18/2023] Open
Abstract
Listeria monocytogenes is a widespread foodborne pathogen contaminating foods during their production or processing stages. Fresh meat is susceptible to such contamination if it is not properly preserved. Our study was conducted to reveal the level of contamination and prevalence of Listeria spp. present in livestock and poultry meat from Gansu province. A total of 1,387 samples were collected from five cities in Gansu Province according to standard sampling procedures, of which 174 samples (12.5%) were positive for Listeria species. Among them, 14 isolates of L. monocytogenes (1.0%), 150 isolates of Listeria innocua (10.8%), and ten isolates of Listeria welshimeri (0.7%) were identified by conventional bacteriological and molecular identification methods. All isolates were subjected to serological assays, antimicrobial susceptibility tests, growth curve assays, determination of biofilm-forming capacity, and cluster analysis of the 16S rRNA gene sequences. Four predominant serotypes of L. monocytogenes were identified, including 1/2a (35.7%, 5/14), 1/2b (14.3%, 2/14), 1/2c (42.9%, 6/14), and 4b (7.1%, 1/14). All L. monocytogenes isolates were resistant to tetracycline and cefoxitin. Most L. innocua isolates (63.6%, 14/22) and L. welshimeri (40%, 4/10) were resistant to tetracycline. The high biofilm-forming ability was observed among 1/2c and 1/2a serotype isolates. The cluster analysis of the 16S rRNA gene sequences revealed a close genetic relationship between the three Listeria species. This study fills the gap in the knowledge of livestock and poultry meat that carry Listeria in slaughterhouses and markets in Gansu Province.
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Affiliation(s)
- Zhijie Dong
- 1College of Veterinary Medical, Gansu Agricultural University, Lanzhou, China
| | - Yanan Sun
- 1College of Veterinary Medical, Gansu Agricultural University, Lanzhou, China
- 2Highway Animal and Plant Joint Epidemic Prevention and Quarantine Station, Hami, China
| | - Qing Cao
- 1College of Veterinary Medical, Gansu Agricultural University, Lanzhou, China
| | - Hongxia Liu
- 3Lanzhou Animal's Sanitation Inspection, Lanzhou, China
| | - Yuanyuan Liu
- 1College of Veterinary Medical, Gansu Agricultural University, Lanzhou, China
| | - Qihang Cao
- 1College of Veterinary Medical, Gansu Agricultural University, Lanzhou, China
| | - Huilin Wei
- 1College of Veterinary Medical, Gansu Agricultural University, Lanzhou, China
| | - Chen Song
- 1College of Veterinary Medical, Gansu Agricultural University, Lanzhou, China
| | - Huitian Gou
- 1College of Veterinary Medical, Gansu Agricultural University, Lanzhou, China
| | - Huiwen Xue
- 1College of Veterinary Medical, Gansu Agricultural University, Lanzhou, China
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Prevalence, Antibiogram and Genetic Characterization of Listeria monocytogenes from Food Products in Egypt. Foods 2021; 10:foods10061381. [PMID: 34203741 PMCID: PMC8232309 DOI: 10.3390/foods10061381] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 06/06/2021] [Accepted: 06/09/2021] [Indexed: 12/15/2022] Open
Abstract
World Health Organization classified Listeria monocytogenes as a major notable foodborne pathogen associated with high mortality and hospitalization. The study reports the prevalence, antibiogram, virulence determination and genetic characterization of L. monocytogenes from different food products. A total of 250 food samples, fifty samples each from raw milk, ice cream, minced meat, fish fillet and sausage were collected from the Menoufiya governorate in Egypt. L. monocytogenes was detected in 17 (6.8%) of the tested food samples including minced meat (14%), fish fillet (8%), sausage (6%) and raw milk (6%). The antimicrobial susceptibility assay of 17 L. monocytogenes isolates against seventeen antibiotics belonging to eight antibiotics classes revealed a high susceptibility to norfloxacin (82.3%), amoxicillin-clavulanic acid (76.4%), cefotaxime (70.5%), erythromycin (64.6%), amoxicillin (64.6%), gentamicin (58.7%) and vancomycin (58.7%). While, high resistance was observed against oxytetracycline (76.4%), trimethoprim-sulfamethoxazole (76.4%), chloramphenicol (70.5%), doxycycline (64.6%), levofloxacin (41.2%) and azithromycin (41.2%). Of note, all L. monocytogenes isolates were multidrug-resistant. The multiplex PCR successfully amplified L. monocytogenes in all tested isolates. Screening of the five virulence-related genes revealed the hlyA and iap as the most prevalent genes followed by actA gene, however, the inlA and prfA genes were not detected in any of the studied isolates. The partial 16S rRNA gene sequencing of three L. monocytogenes isolates showed a high nucleotide similarity (99.1–99.8%) between the study isolates and various global clones, and phylogenetic analysis clustered these L. monocytogenes strains with other Listeria species including L. welshimeri, L. seeligeri and L. innocua. This study demonstrates the impact of L. monocytogenes as a major contaminant of various food products and suggests more attention to the awareness and hygienic measures in the food industry.
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Performance and Application of 16S rRNA Gene Cycle Sequencing for Routine Identification of Bacteria in the Clinical Microbiology Laboratory. Clin Microbiol Rev 2020; 33:33/4/e00053-19. [PMID: 32907806 DOI: 10.1128/cmr.00053-19] [Citation(s) in RCA: 123] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
This review provides a state-of-the-art description of the performance of Sanger cycle sequencing of the 16S rRNA gene for routine identification of bacteria in the clinical microbiology laboratory. A detailed description of the technology and current methodology is outlined with a major focus on proper data analyses and interpretation of sequences. The remainder of the article is focused on a comprehensive evaluation of the application of this method for identification of bacterial pathogens based on analyses of 16S multialignment sequences. In particular, the existing limitations of similarity within 16S for genus- and species-level differentiation of clinically relevant pathogens and the lack of sequence data currently available in public databases is highlighted. A multiyear experience is described of a large regional clinical microbiology service with direct 16S broad-range PCR followed by cycle sequencing for direct detection of pathogens in appropriate clinical samples. The ability of proteomics (matrix-assisted desorption ionization-time of flight) versus 16S sequencing for bacterial identification and genotyping is compared. Finally, the potential for whole-genome analysis by next-generation sequencing (NGS) to replace 16S sequencing for routine diagnostic use is presented for several applications, including the barriers that must be overcome to fully implement newer genomic methods in clinical microbiology. A future challenge for large clinical, reference, and research laboratories, as well as for industry, will be the translation of vast amounts of accrued NGS microbial data into convenient algorithm testing schemes for various applications (i.e., microbial identification, genotyping, and metagenomics and microbiome analyses) so that clinically relevant information can be reported to physicians in a format that is understood and actionable. These challenges will not be faced by clinical microbiologists alone but by every scientist involved in a domain where natural diversity of genes and gene sequences plays a critical role in disease, health, pathogenicity, epidemiology, and other aspects of life-forms. Overcoming these challenges will require global multidisciplinary efforts across fields that do not normally interact with the clinical arena to make vast amounts of sequencing data clinically interpretable and actionable at the bedside.
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Terzi Gulel G, Gucukoglu A, Cadirci O, Saka E, Alisarli M. Serotyping and antibiotic resistance of Listeria monocytogenes isolated from raw water buffalo milk and milk products. J Food Sci 2020; 85:2889-2895. [PMID: 32794185 DOI: 10.1111/1750-3841.15376] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 06/20/2020] [Accepted: 06/25/2020] [Indexed: 10/23/2022]
Abstract
This study was aimed to investigate the presence of Listeria monocytogenes in raw water buffalo milk and milk products, besides determining its serotype and the extent of its resistance against various antibiotics. A total of 188 samples of raw water buffalo milk and milk products were collected from Samsun Province, Turkey between November 2012 and May 2013. The classical culture technique was used to isolate and identify L. monocytogenes, as described in EN ISO 11290-1. The isolates were confirmed as L. monocytogenes by using PCR with (hylA) primers specific for the hemolysin gene. The antimicrobial susceptibility test was achieved by using the VITEK 2 compact system and VITEK 2 AST-P640 card. L. monocytogenes was found in 7 (3.7%) of the 188 samples. Four of them were obtained from cheese and three from milk samples. Whereas, L. monocytogenes was not detected in any of the clotted cream samples. A total of 13 isolates were confirmed by PCR as L. monocytogenes. Among these isolates, one was 1/2c (or 3c) (7.6%), three were 4b (or 4d, 4e) (23%), four were 1/2b (or 3b) (30.7%), and the other five isolates were serotype 1/2a (or 3a) (38.4%). The highest antimicrobial resistance was recorded against fosfomycine (100%) followed by oxacillin (92%), penicillin (84%), and erythromycin (69%). However, no resistance was determined against ciprofloxacin, gentamicin, and tigecycline. PRACTICAL APPLICATION: This study showed that some samples of raw buffalo milk and the milk products were contaminated with Listeria monocytogenes. The serotype with the highest prevalence was determined as L. monocytogenes 1/2a. This study also demonstrated that most of the L. monocytogenes isolates had developed multiresistance to many frequently used medical antimicrobial agents.
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Affiliation(s)
- Goknur Terzi Gulel
- Faculty of Veterinary Medicine, Department of Food Hygiene and Technology, Ondokuz Mayıs University, Samsun, Turkey
| | - Ali Gucukoglu
- Faculty of Veterinary Medicine, Department of Food Hygiene and Technology, Ondokuz Mayıs University, Samsun, Turkey
| | - Ozgur Cadirci
- Faculty of Veterinary Medicine, Department of Food Hygiene and Technology, Ondokuz Mayıs University, Samsun, Turkey
| | - Erdem Saka
- Veterinary Control Institute, Samsun, Turkey
| | - Mustafa Alisarli
- Faculty of Veterinary Medicine, Department of Food Hygiene and Technology, Ondokuz Mayıs University, Samsun, Turkey
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Alka, Singh R, Kaur S, Bedi JS. Listeria contamination in chevon and mutton from retail meat shops and slaughter house environment of Punjab, India. FEMS Microbiol Lett 2020; 366:5499021. [PMID: 31132099 DOI: 10.1093/femsle/fnz111] [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] [Received: 09/23/2018] [Accepted: 05/24/2019] [Indexed: 12/17/2022] Open
Abstract
Listeria monocytogenes is recognized as an emerging pathogen, with limited information or statistics on this pathogen. Moreover, poor hygienic practices in the unorganized meat sector favor its growth and survival. Therefore, the present study was carried out in Punjab, India to assess the prevalence of Listeria spp. in chevon and mutton samples, followed by its characterization. The prevalence of Listeria in chevon, mutton and swab samples collected from butchers' shops and slaughter houses was 1.82%, 3.21% and 6.66%, respectively. The 18 (2.67%) L. monocytogenes strains isolated from 786 samples carried one or more virulence-associated gene. Based on virulence genes, 6/18 isolates were potentially pathogenic. Serovar 4b (44.4%) was predominant, followed by serovars 1/2a (22.2%), 1/2b (22.2%) and 1/2c (11.1%). Detection of L. monocytogenes in meat and environment samples indicated poor hygiene, potential cross-contamination and risk of listeriosis to consumers and occupational workers. The findings of the study were also relevant to the fact that most of the slaughtering in Punjab, India is carried out in unorganized way, and this meat is not stored propery. Moreover, in the absence of a systematic foodborne disease surveillance and monitoring program, a database on foodborne diseases is absent, and needs to be established.
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Affiliation(s)
- Alka
- School of Public Health and Zoonoses, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India 141004
| | - Randhir Singh
- School of Public Health and Zoonoses, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India 141004
| | - Simranpreet Kaur
- School of Public Health and Zoonoses, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India 141004
| | - Jasbir Singh Bedi
- School of Public Health and Zoonoses, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India 141004
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Phylogenetic Analysis and Antibiotics Resistance of Listeria Monocytogenes Contaminating Chicken Meat in Surabaya, Indonesia. Vet Med Int 2020; 2020:9761812. [PMID: 32190283 PMCID: PMC7068146 DOI: 10.1155/2020/9761812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 01/19/2020] [Accepted: 02/05/2020] [Indexed: 11/18/2022] Open
Abstract
The objective of this study was to identify the phylogenetic analysis and antibiotic resistance of Listeria monocytogenes contaminating chicken meat in Surabaya. 60 chicken meat samples were collected from supermarkets, mobile vendors, and traditional markets in Surabaya. A selective medium is used for isolation and identification of Listeria monocytogenes by chopping 25 grams of the chicken meat and to put it into the sterilized Erlenmeyer flasks. Some methods were used for the identification procedures, such as biochemical and morphological tests, antibiotic resistance test, PCR, and sequencing; also a phylogenetic analysis was conducted by a neighbor-joining analysis using Genetix Mac ver 8.0 with hlyA genes of Listeria monocytogenes recorded in GenBank, such as Lineage I (KC808543), Lineage II (AY229462, AY229346, AY229499, and AY229404), Lineage III (KJ504139, HQ686043, KJ504116, and DQ988349), and Lineage IV (EU840690, EF030606). The result shows that the prevalence of L. monocytogenes in Surabaya contaminating the chicken meat samples from the supermarkets was 10% (2/20), from the mobile vendors was 0/20 (0%), and from the traditional markets was 5% (1/20). It was seen from the band at 456 bp fragment. Furthermore, three isolates found in Surabaya were included in the new lineages which were resistant to old-generation antibiotics such as sulfamethonazole-trimetophrim (SXT) and amoxyllin sulbactam (MAS), but they were still sensitive to new-generation antibiotics such as cefotaxime (CTX) and meropenem (MEM).
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Characterisation of Listeria monocytogenes from Food and Human Clinical Samples at Duhok, Kurdistan Region of Iraq. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2019. [DOI: 10.22207/jpam.13.4.35] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Osman KM, Kappell AD, Fox EM, Orabi A, Samir A. Prevalence, Pathogenicity, Virulence, Antibiotic Resistance, and Phylogenetic Analysis of Biofilm-Producing Listeria monocytogenes Isolated from Different Ecological Niches in Egypt: Food, Humans, Animals, and Environment. Pathogens 2019; 9:E5. [PMID: 31861483 PMCID: PMC7168649 DOI: 10.3390/pathogens9010005] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 12/07/2019] [Accepted: 12/09/2019] [Indexed: 02/07/2023] Open
Abstract
Serious outbreaks of foodborne disease have been caused by Listeria monocytogenes found in retail delicatessens and the severity of disease is significant, with high hospitalization and mortality rates. Little is understood about the formidable public health threat of L. monocytogenes in all four niches, humans, animals, food, and environment, in Egypt. This study analyzed the presence of L. monocytogenes collected from the four environmental niches and bioinformatics analysis was implemented to analyze and compare the data. PCR was used to detect virulence genes encoded by pathogenicity island (LIPI-1). prfA amino acid substation that causes constitutive expression of virulence was common in 77.7% of isolates. BLAST analysis did not match other isolates in the NCBI database, suggesting this may be a characteristic of the region associated with these isolates. A second group included the NH1 isolate originating in China, and BLAST analysis showed this prfA allele was shared with isolates from other global locations, such as Europe and North America. Identification of possible links and transmission pathways between the four niches helps to decrease the risk of disease in humans, to take more specific control measures in the context of disease prevention, to limit economic losses associated with food recalls, and highlights the need for treatment options.
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Affiliation(s)
- Kamelia M. Osman
- Department of Microbiology, Faculty of Veterinary Medicine, Cairo University, Cairo 12211, Egypt; (A.O.); (A.S.)
| | - Anthony D. Kappell
- Water Quality Center, Department of Civil, Construction and Environmental Engineering, Marquette University, Milwaukee, WI 53233, USA;
| | - Edward M. Fox
- Department of Applied Sciences, North Umbria University, Newcastle upon Tyne NE1 2SU, UK;
| | - Ahmed Orabi
- Department of Microbiology, Faculty of Veterinary Medicine, Cairo University, Cairo 12211, Egypt; (A.O.); (A.S.)
| | - Ahmed Samir
- Department of Microbiology, Faculty of Veterinary Medicine, Cairo University, Cairo 12211, Egypt; (A.O.); (A.S.)
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Soni DK, Ahmad R, Dubey SK. Biosensor for the detection of Listeria monocytogenes: emerging trends. Crit Rev Microbiol 2018; 44:590-608. [PMID: 29790396 DOI: 10.1080/1040841x.2018.1473331] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
The early detection of Listeria monocytogenes (L. monocytogenes) and understanding the disease burden is of paramount interest. The failure to detect pathogenic bacteria in the food industry may have terrible consequences, and poses deleterious effects on human health. Therefore, integration of methods to detect and trace the route of pathogens along the entire food supply network might facilitate elucidation of the main contamination sources. Recent research interest has been oriented towards the development of rapid and affordable pathogen detection tools/techniques. An innovative and new approach like biosensors has been quite promising in revealing the foodborne pathogens. In spite of the existing knowledge, advanced research is still needed to substantiate the expeditious nature and sensitivity of biosensors for rapid and in situ analysis of foodborne pathogens. This review summarizes recent developments in optical, piezoelectric, cell-based, and electrochemical biosensors for Listeria sp. detection in clinical diagnostics, food analysis, and environmental monitoring, and also lists their drawbacks and advantages.
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Affiliation(s)
- Dharmendra Kumar Soni
- a Department of Botany, Institute of Science , Banaras Hindu University , Varanasi , India
| | - Rafiq Ahmad
- b Sensors Lab, Electrical Engineering Program, Computer, Electrical and Mathematical Science and Engineering Division , King Abdullah University of Science and Technology (KAUST) , Thuwal , Kingdom of Saudi Arabia
| | - Suresh Kumar Dubey
- a Department of Botany, Institute of Science , Banaras Hindu University , Varanasi , India
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Hadjilouka A, Paramithiotis S, Drosinos EH. Genetic Analysis of the Listeria Pathogenicity Island 1 of Listeria monocytogenes 1/2a and 4b Isolates. Curr Microbiol 2018; 75:857-865. [PMID: 29468304 DOI: 10.1007/s00284-018-1458-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Accepted: 02/19/2018] [Indexed: 12/22/2022]
Abstract
The aim of the present study was to apply descriptive, phylogenetic, recombination, and selection analyses on alignments of the Listeria Pathogenicity Island 1 (LIPI-1) of 1/2a and 4b Listeria monocytogenes isolates of different origin in order to gain insights into the evolution of this virulence gene cluster. For that purpose, a total of 19 L. monocytogenes isolates (9 meat isolates, serotype 1/2a; 5 meat isolates, serotype 4b; 5 strawberry isolates, serotype 4b) that have been previously separated at strain level were subjected to sequencing of their LIPI-1. Descriptive analysis revealed extensive nucleotide diversity mostly in the intragenic regions. The actA gene of 1/2a and 4b meat isolates and the hly gene of the 4b strawberry isolates exhibited the higher diversity; limited diversity was observed in prfA and plcA genes of the 4b isolates and mpl gene of the 1/2a isolates. Phylogenetic analysis of the complete island resulted in two major clusters that were consistent with serotype assignment of the isolates. Moreover, effective discrimination between serotypes was obtained by plcA, plcB, mpl, actA and the intergenic regions plcA-prfA and plcA-hly. In all cases but plcB and plcA-prfA 4b isolates were also differentiated according to their source of isolation as well. Selection analysis revealed that the island consisted of randomly evolving DNA with the exception of prfA gene of 1/2a isolates and actA gene of 4b meat isolates for which purifying selection or population expansion was indicated. Finally, no statistically significant evidence for recombination has been observed.
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Affiliation(s)
- Agni Hadjilouka
- Laboratory of Food Quality Control and Hygiene, Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 118 55, Athens, Greece
| | - Spiros Paramithiotis
- Laboratory of Food Quality Control and Hygiene, Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 118 55, Athens, Greece.
| | - Eleftherios H Drosinos
- Laboratory of Food Quality Control and Hygiene, Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 118 55, Athens, Greece
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13
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Liao Y, Zhou X, Fu Y, Xing D. Linear Ru(bpy)32+–Polymer as a Universal Probe for Sensitive Detection of Biomarkers with Controllable Electrochemiluminescence Signal-Amplifying Ratio. Anal Chem 2017; 89:13016-13023. [DOI: 10.1021/acs.analchem.7b04142] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yuhui Liao
- MOE Key Laboratory of Laser Life Science
and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Xiaoming Zhou
- MOE Key Laboratory of Laser Life Science
and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Yu Fu
- MOE Key Laboratory of Laser Life Science
and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Da Xing
- MOE Key Laboratory of Laser Life Science
and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
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14
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Soni DK, Ghosh A, Chikara SK, Singh KM, Joshi CG, Dubey SK. Comparative whole genome analysis of Listeria monocytogenes 4b strains reveals least genome diversification irrespective of their niche specificity. GENE REPORTS 2017. [DOI: 10.1016/j.genrep.2017.05.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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15
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Abay S, Irkin R, Aydin F, Müştak HK, Diker KS. The prevalence of major foodborne pathogens in ready-to-eat chicken meat samples sold in retail markets in Turkey and the molecular characterization of the recovered isolates. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2017.03.052] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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16
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Sharma S, Sharma V, Dahiya DK, Khan A, Mathur M, Sharma A. Prevalence, Virulence Potential, and Antibiotic Susceptibility Profile of Listeria monocytogenes Isolated From Bovine Raw Milk Samples Obtained From Rajasthan, India. Foodborne Pathog Dis 2017; 14:132-140. [PMID: 28085487 DOI: 10.1089/fpd.2016.2118] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Listeriosis is a serious foodborne disease of a global concern, and can effectively be controlled by a continuous surveillance of the virulent and multidrug-resistant strains of Listeria monocytogenes. This study was planned to investigate prevalence of L. monocytogenes in bovine raw milk samples. A total of 457 raw milk samples collected from 15 major cities in Rajasthan, India, were analyzed for the presence of L. monocytogenes by using standard microbiological and molecular methods. Five of the 457 samples screen tested positive for L. monocytogenes. Multiplex serotyping showed that 3/5 strains belonged to serotype 4b followed by one strain each to 1/2a and to 1/2c. Further virulence potential assessment indicated that all strains possessed inlA and inlC internalins, and, in addition, two strains also possessed the gene for inlB. All strains were positive for Listeriolysin O (LLO) and showed phosphatidylinositol-specific phospholipase C (PI-PLC) activity on an in vitro agar medium with variations in production levels among the strains. A good correlation between the in vitro pathogenicity test and the chick embryo test was observed, as the strains showing higher LLO and PI-PLC activity were found to be lethal to fertilized chick embryos. All strains were resistant to the majority of antibiotics and were designated as multidrug-resistant strains. However, these strains were susceptible to 9 of the 22 tested antibiotics. The maximum zone of inhibition (mm) and acceptable minimum inhibitory concentration were observed with azithromycin, and thus it could be the first choice of a treatment. Overall, the presence of multidrug-resistant L. monocytogenes strains in the raw milk of Rajasthan region is an indicator of public health hazard and highlighting the need of consumer awareness in place and implementation of stricter food safety regulations at all levels of milk production.
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Affiliation(s)
- Sanjita Sharma
- Advanced Milk Testing Research Laboratory, Post Graduate Institute of Veterinary Education and Research , Mansarovar, Jaipur, Rajasthan, India
| | - Vishnu Sharma
- Advanced Milk Testing Research Laboratory, Post Graduate Institute of Veterinary Education and Research , Mansarovar, Jaipur, Rajasthan, India
| | - Dinesh Kumar Dahiya
- Advanced Milk Testing Research Laboratory, Post Graduate Institute of Veterinary Education and Research , Mansarovar, Jaipur, Rajasthan, India
| | - Aarif Khan
- Advanced Milk Testing Research Laboratory, Post Graduate Institute of Veterinary Education and Research , Mansarovar, Jaipur, Rajasthan, India
| | - Manisha Mathur
- Advanced Milk Testing Research Laboratory, Post Graduate Institute of Veterinary Education and Research , Mansarovar, Jaipur, Rajasthan, India
| | - Amit Sharma
- Advanced Milk Testing Research Laboratory, Post Graduate Institute of Veterinary Education and Research , Mansarovar, Jaipur, Rajasthan, India
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17
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Mohamed Y, Reda WW, Abdel-Moein K, Abd El-Razik KA, Barakat AM, El Fadaly HA, Hassanain NA, Hegazi AG. Prevalence and phylogenetic characterization of Listeria monocytogenes isolated from processed meat marketed in Egypt. J Genet Eng Biotechnol 2016; 14:119-123. [PMID: 30647605 PMCID: PMC6299886 DOI: 10.1016/j.jgeb.2016.06.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 05/22/2016] [Accepted: 06/05/2016] [Indexed: 11/23/2022]
Abstract
Because of its high case fatality rate, listeriosis locates among the most frequent causes of death due to food-borne illness. In this study, a total of 150 processed meat samples were collected from Giza Governorate, Egypt. Phenotypic and genotypic identification of Listeria monocytogenes was performed using PCR incorporating listeriolysin O virulence gene hlyA followed by DNA sequence analysis. L. monocytogenes was confirmed in 4% of each of beef burger, minced meat, and luncheon samples. Phylogenetic analysis showed that all the six Egyptian isolates have high homology with Colombian isolate (EF030606), except one Egyptian isolate which showed high homology with Indian isolate (EU840690). The public health significance of these pathogens as well as recommended sanitary measures were discussed.
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Affiliation(s)
- Yasmin Mohamed
- Department of Zoonoses, National Research Center, El-Behouth St., Giza, Egypt
| | - Waffa W. Reda
- Department of Zoonoses, Faculty of Veterinary Medicine, Cairo University, Egypt
| | - Khaled Abdel-Moein
- Department of Zoonoses, Faculty of Veterinary Medicine, Cairo University, Egypt
| | - Khaled A. Abd El-Razik
- Department of Reproduction and A.I., National Research Center, El-Behouth St., Giza, Egypt
- Corresponding author.
| | - Ashraf M.A. Barakat
- Department of Zoonoses, National Research Center, El-Behouth St., Giza, Egypt
| | - Hassan A. El Fadaly
- Department of Zoonoses, National Research Center, El-Behouth St., Giza, Egypt
| | - Nawal A. Hassanain
- Department of Zoonoses, National Research Center, El-Behouth St., Giza, Egypt
| | - Ahmed G. Hegazi
- Department of Zoonoses, National Research Center, El-Behouth St., Giza, Egypt
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18
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Beye M, Gouriet F, Michelle C, Casalta JP, Habib G, Raoult D, Fournier PE. Genome analysis of Listeria ivanovii strain G770 that caused a deadly aortic prosthesis infection. New Microbes New Infect 2016; 10:87-92. [PMID: 26933501 PMCID: PMC4765741 DOI: 10.1016/j.nmni.2016.01.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 01/07/2016] [Accepted: 01/14/2016] [Indexed: 12/03/2022] Open
Abstract
We sequenced the genome of Listeria ivanovii strain G770, which caused a deadly infection of the thoracic aortic prosthesis of a 78-year-old man. The 2.9 Mb genome exhibited 21 specific genes among L. ivanovii strains, including five genes encoding a type I restriction modification system and one glycopeptide resistance gene.
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Affiliation(s)
- M Beye
- URMITE, UM63, CNRS7278, IRD198, Inserm1095, Institut Hospitalo-Universitaire Méditerranée-infection, Aix-Marseille Université, Faculté de Médecine, Marseille, France
| | - F Gouriet
- URMITE, UM63, CNRS7278, IRD198, Inserm1095, Institut Hospitalo-Universitaire Méditerranée-infection, Aix-Marseille Université, Faculté de Médecine, Marseille, France
| | - C Michelle
- URMITE, UM63, CNRS7278, IRD198, Inserm1095, Institut Hospitalo-Universitaire Méditerranée-infection, Aix-Marseille Université, Faculté de Médecine, Marseille, France
| | - J-P Casalta
- URMITE, UM63, CNRS7278, IRD198, Inserm1095, Institut Hospitalo-Universitaire Méditerranée-infection, Aix-Marseille Université, Faculté de Médecine, Marseille, France
| | - G Habib
- URMITE, UM63, CNRS7278, IRD198, Inserm1095, Institut Hospitalo-Universitaire Méditerranée-infection, Aix-Marseille Université, Faculté de Médecine, Marseille, France
| | - D Raoult
- URMITE, UM63, CNRS7278, IRD198, Inserm1095, Institut Hospitalo-Universitaire Méditerranée-infection, Aix-Marseille Université, Faculté de Médecine, Marseille, France; Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdul Aziz University, Jeddah, Saudi Arabia
| | - P-E Fournier
- URMITE, UM63, CNRS7278, IRD198, Inserm1095, Institut Hospitalo-Universitaire Méditerranée-infection, Aix-Marseille Université, Faculté de Médecine, Marseille, France
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19
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Gu Y, Liang X, Huang Z, Yang Y. Outbreak of Listeria Monocytogenes in Pheasants. Poult Sci 2015; 94:2905-8. [PMID: 26476090 DOI: 10.3382/ps/pev264] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 08/12/2015] [Indexed: 11/20/2022] Open
Abstract
Listeria monocytogenes is capable of infecting almost all animals. However, outbreaks of listeriosis are infrequent in birds. This report describes an outbreak of listeriosis in a small pheasant (Phasianus colchicus) breeder farm with more than 2,000 pheasants from Hubei province of the People's Republic of China. The affected flock consisted of adult and young birds. Approximately 300 young birds and a few adult birds were found dead within a few days of the onset of clinical signs. Twenty-five dead birds were collected for further examination. Histopathological lesions in the visceral organs were characterized by monocyte infiltration and proliferation. Localized encephalitis and meningitis were detected in the brains of dead birds. Gram-positive organisms were observed in heart blood smear, liver, and brain impression smears. The organisms were isolated from fresh liver and were identified as L. monocytogenes serotype 4b based on multiplex polymerase chain reaction (PCR) and hlyA gene sequence analysis. This is the first report describing outbreak of listeriosis in pheasant flock.
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Affiliation(s)
- Yufang Gu
- College of Animal Science, Yangtze University, Jingzhou 434025, P.R. China
| | - Xiongyan Liang
- College of Animal Science, Yangtze University, Jingzhou 434025, P.R. China
| | - Zhuan Huang
- College of Animal Science, Yangtze University, Jingzhou 434025, P.R. China
| | - Yuying Yang
- College of Animal Science, Yangtze University, Jingzhou 434025, P.R. China
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20
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Tan MF, Siow CC, Dutta A, Mutha NV, Wee WY, Heydari H, Tan SY, Ang MY, Wong GJ, Choo SW. Development of ListeriaBase and comparative analysis of Listeria monocytogenes. BMC Genomics 2015; 16:755. [PMID: 26444974 PMCID: PMC4595109 DOI: 10.1186/s12864-015-1959-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 09/29/2015] [Indexed: 01/01/2023] Open
Abstract
Background Listeria consists of both pathogenic and non-pathogenic species. Reports of similarities between the genomic content between some pathogenic and non-pathogenic species necessitates the investigation of these species at the genomic level to understand the evolution of virulence-associated genes. With Listeria genome data growing exponentially, comparative genomic analysis may give better insights into evolution, genetics and phylogeny of Listeria spp., leading to better management of the diseases caused by them. Description With this motivation, we have developed ListeriaBase, a web Listeria genomic resource and analysis platform to facilitate comparative analysis of Listeria spp. ListeriaBase currently houses 850,402 protein-coding genes, 18,113 RNAs and 15,576 tRNAs from 285 genome sequences of different Listeria strains. An AJAX-based real time search system implemented in ListeriaBase facilitates searching of this huge genomic data. Our in-house designed comparative analysis tools such as Pairwise Genome Comparison (PGC) tool allowing comparison between two genomes, Pathogenomics Profiling Tool (PathoProT) for comparing the virulence genes, and ListeriaTree for phylogenic classification, were customized and incorporated in ListeriaBase facilitating comparative genomic analysis of Listeria spp. Interestingly, we identified a unique genomic feature in the L. monocytogenes genomes in our analysis. The Auto protein sequences of the serotype 4 and the non-serotype 4 strains of L. monocytogenes possessed unique sequence signatures that can differentiate the two groups. We propose that the aut gene may be a potential gene marker for differentiating the serotype 4 strains from other serotypes of L. monocytogenes. Conclusions ListeriaBase is a useful resource and analysis platform that can facilitate comparative analysis of Listeria for the scientific communities. We have successfully demonstrated some key utilities of ListeriaBase. The knowledge that we obtained in the analyses of L. monocytogenes may be important for functional works of this human pathogen in future. ListeriaBase is currently available at http://listeria.um.edu.my. Electronic supplementary material The online version of this article (doi:10.1186/s12864-015-1959-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Mui Fern Tan
- Genome Informatics Research Laboratory, High Impact Research Building, University of Malaya, Kuala Lumpur, 50603, Malaysia. .,Department of Oral Biology and Biomedical Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur, 50603, Malaysia.
| | - Cheuk Chuen Siow
- Genome Informatics Research Laboratory, High Impact Research Building, University of Malaya, Kuala Lumpur, 50603, Malaysia.
| | - Avirup Dutta
- Genome Informatics Research Laboratory, High Impact Research Building, University of Malaya, Kuala Lumpur, 50603, Malaysia.
| | - Naresh Vr Mutha
- Genome Informatics Research Laboratory, High Impact Research Building, University of Malaya, Kuala Lumpur, 50603, Malaysia.
| | - Wei Yee Wee
- Genome Informatics Research Laboratory, High Impact Research Building, University of Malaya, Kuala Lumpur, 50603, Malaysia. .,Department of Oral Biology and Biomedical Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur, 50603, Malaysia.
| | - Hamed Heydari
- Genome Informatics Research Laboratory, High Impact Research Building, University of Malaya, Kuala Lumpur, 50603, Malaysia. .,Computer Science and Engineering Department, University of Nebraska-Lincoln, Lincoln, NE, 1468588-0115, USA.
| | - Shi Yang Tan
- Genome Informatics Research Laboratory, High Impact Research Building, University of Malaya, Kuala Lumpur, 50603, Malaysia. .,Department of Oral Biology and Biomedical Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur, 50603, Malaysia.
| | - Mia Yang Ang
- Genome Informatics Research Laboratory, High Impact Research Building, University of Malaya, Kuala Lumpur, 50603, Malaysia. .,Department of Oral Biology and Biomedical Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur, 50603, Malaysia.
| | - Guat Jah Wong
- Genome Informatics Research Laboratory, High Impact Research Building, University of Malaya, Kuala Lumpur, 50603, Malaysia. .,Department of Oral Biology and Biomedical Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur, 50603, Malaysia.
| | - Siew Woh Choo
- Genome Informatics Research Laboratory, High Impact Research Building, University of Malaya, Kuala Lumpur, 50603, Malaysia. .,Department of Oral Biology and Biomedical Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur, 50603, Malaysia. .,Genome Solutions Sdn Bhd, Suite 8, Innovation Incubator UM, Level 5, Research Management & Innovation Complex, University of Malaya, Kuala Lumpur, 50603, Malaysia.
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21
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Soni DK, Singh DV, Dubey SK. Pregnancy - associated human listeriosis: Virulence and genotypic analysis of Listeria monocytogenes from clinical samples. J Microbiol 2015; 53:653-60. [PMID: 26231373 DOI: 10.1007/s12275-015-5243-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 06/26/2015] [Accepted: 07/15/2015] [Indexed: 11/26/2022]
Abstract
Listeria monocytogenes, a life-threatening pathogen, poses severe risk during pregnancy, may cause abortion, fetal death or neonatal morbidity in terms of septicemia and meningitis. The present study aimed at characterizing L. monocytogenes isolated from pregnant women based on serotyping, antibiotic susceptibility, virulence genes, in vivo pathogenicity test and ERIC- and REP-PCR fingerprint analyses. The results revealed that out of 3700 human clinical samples, a total of 30 (0.81%) isolates [12 (0.80%) from placental bit (1500), 18 (0.81%) from vaginal swab (2200)] were positive for L. monocytogenes. All the isolates belonged to serogroup 4b, and were + ve for virulence genes tested i.e. inlA, inlC, inlJ, plcA, prfA, actA, hlyA, and iap. Based on the mice inoculation tests, 20 isolates showed 100% and 4 isolates 60% relative virulence while 6 isolates were non-pathogenic. Moreover, 2 and 10 isolates were resistant to ciprofloxacin and cefoxitin, respectively, while the rest susceptible to other antibiotics used in this study. ERIC- and REP-PCR collectively depicted that the isolates from placental bit and vaginal swab had distinct PCR fingerprints except a few isolates with identical patterns. This study demonstrates prevalence of pathogenic strains mostly resistant to cefoxitin and/or ciprofloxacin. The results indicate the importance of isolating and characterizing the pathogen from human clinical samples as the pre-requisite for accurate epidemiological investigations.
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Affiliation(s)
- Dharmendra Kumar Soni
- Environmental Microbiology Laboratory, Department of Botany, Banaras Hindu University, Varanasi, 221005, India
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Soni DK, Mishra SK, Prakash R, Dubey SK. Label-free impedimetric detection of Listeria monocytogenes based on poly-5-carboxy indole modified ssDNA probe. J Biotechnol 2015; 200:70-6. [PMID: 25746904 DOI: 10.1016/j.jbiotec.2015.02.025] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 02/14/2015] [Accepted: 02/17/2015] [Indexed: 01/03/2023]
Abstract
Listeria monocytogenes is a life threatening pathogenic bacteria concerned with human health. The accurate and rapid detection of L. monocytogenes is required for preventing of listeriosis. In this study, DNA sensing probe based on conducting polymer poly-5-carboxy indole (5C Pin) was developed for the detection of L. monocytogenes hlyA gene responsible for pathogenicity. The probe sequences (24 mer ssDNA) were covalently immobilized on 5C Pin via N-(3-dimethylaminopropyl)-N'-ethylcarbodiimidehydrochloride (EDC) and N-hydroxysuccinimide (NHS). The probe having ssDNA was further hybridized with the target DNA sequence. Electrochemical impedance spectroscopic study was carried out to determine the extent of DNA hybridization over the probe. Significant change was observed in the impedance spectra before and after hybridization of ssDNA immobilized over the probe with the target DNA. RCT (charge transfer resistance) was estimated from the Nyquist plot (impedance plot) for target DNA (hlyA gene) in the solution. RCT vs. logarithmic concentrations of the target (genomic) DNA plot showed a linear range (1 × 10(-4) to 1 × 10(-12)M) in case hybridization was performed under optimized conditions. The method proposed, is simple, free from any label, and highly sensitive for the detection of L. monocytogenes in environmental and clinical samples.
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Affiliation(s)
- Dharmendra Kumar Soni
- Centre of Advanced Study in Botany, Faculty of Science, Banaras Hindu University, Varanasi 221005, India
| | - Sunil Kumar Mishra
- Central Instrument Facility Centre, Dr. H.S.G. Central University, Sagar 470003, India
| | - Rajiv Prakash
- School of Materials Science and Technology, Indian Institute of Technology, Banaras Hindu University, Varanasi 221005, India
| | - Suresh Kumar Dubey
- Centre of Advanced Study in Botany, Faculty of Science, Banaras Hindu University, Varanasi 221005, India.
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Whole-Genome Sequence of Listeria monocytogenes Strains from Clinical and Environmental Samples from Varanasi, India. GENOME ANNOUNCEMENTS 2015; 3:3/1/e01496-14. [PMID: 25657276 PMCID: PMC4319597 DOI: 10.1128/genomea.01496-14] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
We present here the whole-genome sequences of Listeria monocytogenes from Ganges River water, agricultural soil, and human clinical samples from Varanasi, India, which will be used for a comparative analysis.
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