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Kartsev NN, Detusheva EV, Kalmantaeva OV, Korobova OV, Gerasimov VN, Kombarova TI, Borzilov AI, Fursova NK, Vereshchagin AN, Svetoch EA. Hetero-Pathogenic O181:H4 EAHEC Strain of Sequence Type ST678 Associated with Hemolytic-Uremic Syndrome in Schoolchildren in Russia. Microorganisms 2023; 11:1771. [PMID: 37512943 PMCID: PMC10383572 DOI: 10.3390/microorganisms11071771] [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: 05/15/2023] [Revised: 07/04/2023] [Accepted: 07/05/2023] [Indexed: 07/30/2023] Open
Abstract
BACKGROUND In the last decade, the importance of hetero-pathogenic enteroaggregative Shiga-toxin-producing E. coli for public health has increased. Recently, we described the genetic background of the EAHEC O181:H4 strain of ST678 carrying the stx2 gene in prophage and five plasmids, including the plasmid-carrying aggR and aaiC genes. Here, we present the morphological and enzymatic characteristics of this strain, as well as susceptibility to antimicrobials, biofilm formation, etc. Methods: Bacterial morphology was studied using an electron microscope. Susceptibility to antimicrobials was determined using the microdilution method. Cytotoxicity was estimated in Vero cells. Virulence was studied on mice. RESULTS The morphological and enzymatic properties of the hetero-pathogenic EAHEC strain were typical for E. coli; electron microscopy revealed the specific flagella. The strain was susceptible to most antibiotics and disinfectants but resistant to ampicillin and ciprofloxacin and showed a high degree of biofilm formation. Cytotoxicity towards Vero cells was estimated as 80%. CONCLUSIONS The emergence of a new O181:H4 EAHEC strain poses a potential threat to humans because of the virulence potential that must be taken into account in the epidemiological analysis of outbreaks and sporadic cases of foodborne infections associated with hemolytic-uremic syndrome.
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Affiliation(s)
- Nikolay N Kartsev
- Department of Molecular Microbiology, State Research Center for Applied Microbiology and Biotechnology, Territory "Kvartal A", 142279 Obolensk, Russia
| | - Elena V Detusheva
- Department of Molecular Microbiology, State Research Center for Applied Microbiology and Biotechnology, Territory "Kvartal A", 142279 Obolensk, Russia
| | - Olga V Kalmantaeva
- Laboratory of Molecular Biology, State Research Center for Applied Microbiology and Biotechnology, Territory "Kvartal A", 142279 Obolensk, Russia
| | - Olga V Korobova
- Laboratory of Biological Trials, State Research Center for Applied Microbiology and Biotechnology, Territory "Kvartal A", 142279 Obolensk, Russia
| | - Vladimir N Gerasimov
- Department of Disinfectology, State Research Center for Applied Microbiology and Biotechnology, Territory "Kvartal A", 142279 Obolensk, Russia
| | - Tatiana I Kombarova
- Laboratory of Biological Trials, State Research Center for Applied Microbiology and Biotechnology, Territory "Kvartal A", 142279 Obolensk, Russia
| | - Aleksander I Borzilov
- Laboratory of Biological Trials, State Research Center for Applied Microbiology and Biotechnology, Territory "Kvartal A", 142279 Obolensk, Russia
| | - Nadezhda K Fursova
- Department of Molecular Microbiology, State Research Center for Applied Microbiology and Biotechnology, Territory "Kvartal A", 142279 Obolensk, Russia
| | | | - Edward A Svetoch
- Department of Molecular Microbiology, State Research Center for Applied Microbiology and Biotechnology, Territory "Kvartal A", 142279 Obolensk, Russia
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Kumar H, Mandal PK. Synthetic routes toward pentasaccharide repeating unit corresponding to the O-antigen of Escherichia coli O181. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.02.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Martorelli L, Albanese A, Vilte D, Cantet R, Bentancor A, Zolezzi G, Chinen I, Ibarra C, Rivas M, Mercado EC, Cataldi A. Shiga toxin-producing Escherichia coli (STEC) O22:H8 isolated from cattle reduces E. coli O157:H7 adherence in vitro and in vivo. Vet Microbiol 2017; 208:8-17. [PMID: 28888654 DOI: 10.1016/j.vetmic.2017.06.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 06/28/2017] [Accepted: 06/28/2017] [Indexed: 01/05/2023]
Abstract
PROBLEM ADDRESSED Shiga toxin-producing Escherichia coli (STEC) are a group of bacteria responsible for food-associated diseases. Clinical features include a wide range of symptoms such as diarrhea, hemorrhagic colitis and the hemolytic uremic syndrome (HUS), a life-threatening condition. OBJECTIVE Our group has observed that animals naturally colonized with STEC strains of unknown serotype were not efficiently colonized with E. coli O157:H7 after experimental infection. In order to assess the basis of the interference, three STEC strains were isolated from STEC persistently-colonized healthy cattle from a dairy farm in Buenos Aires, Argentina. METHODS AND RESULTS The three isolated strains are E. coli O22:H8 and carry the stx1 and stx2d genes. The activatable activity of Stx2d was demonstrated in vitro. The three strains carry the adhesins iha, ehaA and lpfO113. E. coli O22:H8 formed stronger biofilms in abiotic surface than E. coli O157:H7 (eae+, stx2+) and displayed a more adherent phenotype in vitro towards HeLa cells. Furthermore, when both serotypes were cultured together O22:H8 could reduce O157:H7 adherence in vitro. When calves were intragastrically pre-challenged with 108 CFU of a mixture of the three STEC strains and two days later challenged with the same dose of the strain E. coli O157:H7 438/99, the shedding of the pathogen was significantly reduced. CONCLUSIONS These results suggest that E. coli O22:H8, a serotype rarely associated with human illness, might compete with O157:H7 at the bovine recto-anal junction, making non-O157 carrying-calves less susceptible to O157:H7 colonization and shedding of the bacteria to the environment.
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Affiliation(s)
- L Martorelli
- Instituto de Patobiología, CICVyA, Instituto Nacional de Tecnología Agropecuaria, Hurlingham 1686, Argentina
| | - A Albanese
- Laboratorio de Fisiopatogenia, Departamento de Fisiología, Instituto de Fisiología y Biofísica Bernardo Houssay (IFIBIO Houssay-CONICET), Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires 1121, Argentina
| | - D Vilte
- Instituto de Patobiología, CICVyA, Instituto Nacional de Tecnología Agropecuaria, Hurlingham 1686, Argentina
| | - R Cantet
- Facultad de Agronomía, Universidad de Buenos Aires-CONICET, Buenos Aires 1427, Argentina
| | - A Bentancor
- Cátedra de Microbiología, Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Buenos Aires 1427, Argentina
| | - G Zolezzi
- Servicio Fisiopatogenia, INEI-ANLIS "Dr. Carlos G. Malbrán", Buenos Aires 1282, Argentina
| | - I Chinen
- Servicio Fisiopatogenia, INEI-ANLIS "Dr. Carlos G. Malbrán", Buenos Aires 1282, Argentina
| | - C Ibarra
- Laboratorio de Fisiopatogenia, Departamento de Fisiología, Instituto de Fisiología y Biofísica Bernardo Houssay (IFIBIO Houssay-CONICET), Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires 1121, Argentina
| | - M Rivas
- Servicio Fisiopatogenia, INEI-ANLIS "Dr. Carlos G. Malbrán", Buenos Aires 1282, Argentina
| | - E C Mercado
- Instituto de Patobiología, CICVyA, Instituto Nacional de Tecnología Agropecuaria, Hurlingham 1686, Argentina
| | - A Cataldi
- Instituto de Biotecnología, CICVyA, Instituto Nacional de Tecnología Agropecuaria, Hurlingham 1686, Argentina.
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dos Santos L, Biscola F, Gonçalves E, Guth B. Biofilm formation, invasiveness and colicinogeny in locus of enterocyte and effacement negative O113:H21 ShigatoxigenicEscherichia coli. J Appl Microbiol 2017; 122:1101-1109. [DOI: 10.1111/jam.13409] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 01/02/2017] [Accepted: 01/27/2017] [Indexed: 11/28/2022]
Affiliation(s)
- L.F. dos Santos
- Adolfo Lutz Institute; Center of Bacteriology; Sao Paulo Brazil
- Department of Microbiology, Immunology and Parasitology; Federal University of Sao Paulo; Sao Paulo Brazil
| | - F.T. Biscola
- Department of Microbiology, Immunology and Parasitology; Federal University of Sao Paulo; Sao Paulo Brazil
| | - E.M. Gonçalves
- Department of Microbiology, Immunology and Parasitology; Federal University of Sao Paulo; Sao Paulo Brazil
| | - B.E.C. Guth
- Department of Microbiology, Immunology and Parasitology; Federal University of Sao Paulo; Sao Paulo Brazil
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Fontana C, Weintraub A, Widmalm G. Structural Elucidation of the O-Antigen Polysaccharide from Escherichia coli O181. ChemistryOpen 2014; 4:47-55. [PMID: 25861570 PMCID: PMC4380953 DOI: 10.1002/open.201402068] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Indexed: 12/02/2022] Open
Abstract
Shiga-toxin-producing Escherichia coli (STEC) is an important pathogen associated to food-borne infection in humans; strains of E. coli O181, isolated from human cases of diarrhea, have been classified as belonging to this pathotype. Herein, the structure of the O-antigen polysaccharide (PS) from E. coli O181 has been investigated. The sugar analysis showed quinovosamine (QuiN), glucosamine (GlcN), galactosamine (GalN), and glucose (Glc) as major components. Analysis of the high-resolution mass spectrum of the oligosaccharide (OS), obtained by dephosphorylation of the O-deacetylated PS with aqueous 48 % hydrofluoric acid, revealed a pentasaccharide composed of two QuiNAc, one GlcNAc, one GalNAc, and one Glc residue. The 1H and 13C NMR chemical shift assignments of the OS were carried out using 1 D and 2 D NMR experiments, and the OS was sequenced using a combination of tandem mass spectrometry (MS/MS) data and NMR 13C NMR glycosylation shifts. The structure of the native PS was determined using NMR spectroscopy, and it consists of branched pentasaccharide repeating units joined by phosphodiester linkages: →4)[α-l-QuipNAc-(1→3)]-α-d-GalpNAc6Ac-(1→6)-α-d-Glcp-(1→P-4)-α-l-QuipNAc-(1→3)-β-d-GlcpNAc-(1→; the O-acetyl groups represent 0.4 equivalents per repeating unit. Both the OS and PSs exhibit rare conformational behavior since two of the five anomeric proton resonances could only be observed at an elevated temperature.
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Affiliation(s)
- Carolina Fontana
- Arrhenius Laboratory, Department of Organic Chemistry, Stockholm University S-106 91 Stockholm (Sweden)
| | - Andrej Weintraub
- Department of Laboratory Medicine, Division of Clinical Microbiology, Karolinska Institute, Karolinska University Hospital S-141 86 Stockholm (Sweden)
| | - Göran Widmalm
- Arrhenius Laboratory, Department of Organic Chemistry, Stockholm University S-106 91 Stockholm (Sweden)
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Jaglic Z, Desvaux M, Weiss A, Nesse LL, Meyer RL, Demnerova K, Schmidt H, Giaouris E, Sipailiene A, Teixeira P, Kačániová M, Riedel CU, Knøchel S. Surface adhesins and exopolymers of selected foodborne pathogens. MICROBIOLOGY-SGM 2014; 160:2561-2582. [PMID: 25217529 DOI: 10.1099/mic.0.075887-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The ability of bacteria to bind different compounds and to adhere to biotic and abiotic surfaces provides them with a range of advantages, such as colonization of various tissues, internalization, avoidance of an immune response, and survival and persistence in the environment. A variety of bacterial surface structures are involved in this process and these promote bacterial adhesion in a more or less specific manner. In this review, we will focus on those surface adhesins and exopolymers in selected foodborne pathogens that are involved mainly in primary adhesion. Their role in biofilm development will also be considered when appropriate. Both the clinical impact and the implications for food safety of such adhesion will be discussed.
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Affiliation(s)
- Zoran Jaglic
- Veterinary Research Institute, Brno, Czech Republic
| | - Mickaël Desvaux
- INRA, UR454 Microbiologie, F-63122 Saint-Genès Champanelle, France
| | - Agnes Weiss
- Department of Food Microbiology, Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 28, 70599 Stuttgart, Germany
| | | | - Rikke L Meyer
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark
| | - Katerina Demnerova
- Institute of Chemical Technology, Faculty of Food and Biochemical Technology, Department of Biochemistry and Microbiology, Technicka 5, Prague, 166 28, Czech Republic
| | - Herbert Schmidt
- Department of Food Microbiology, Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 28, 70599 Stuttgart, Germany
| | - Efstathios Giaouris
- Department of Food Science and Nutrition, Faculty of the Environment, University of the Aegean, 81400 Myrina, Lemnos Island, Greece
| | | | - Pilar Teixeira
- CEB - Centre of Biological Engineering, University of Minho, Braga, Portugal
| | | | - Christian U Riedel
- Institute of Microbiology and Biotechnology, University of Ulm, Ulm, Germany
| | - Susanne Knøchel
- Department of Food Science, University of Copenhagen, Rolighedsvej 30, Frederiksberg C 1958, Denmark
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Sánchez S, Díaz-Sánchez S, Martínez R, Llorente MT, Herrera-León S, Vidal D. The new allelic variant of the subtilase cytotoxin (subAB2) is common among Shiga toxin-producing Escherichia coli strains from large game animals and their meat and meat products. Vet Microbiol 2013; 166:645-9. [PMID: 23880308 DOI: 10.1016/j.vetmic.2013.06.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 06/19/2013] [Accepted: 06/24/2013] [Indexed: 10/26/2022]
Abstract
Subtilase cytotoxin (SubAB) is an AB5 toxin produced by Shiga toxin (Stx)-producing Escherichia coli (STEC) strains usually lacking the eae gene product intimin. Two allelic variants of SubAB encoding genes have been described: subAB1, located on a plasmid, and subAB2, located on a pathogenicity island (PAI) together with tia gene. While subAB1 has been reported to be more frequent among bovine strains, subAB2 has been mainly associated with strains from small ruminants. We investigated the presence of the two variants of subAB among 59 eae-negative STEC from large game animals (deer and wild boar) and their meat and meat products in order to assess the role of other species in the epidemiology of subAB-positive, eae-negative STEC. For this approach, the strains were PCR-screened for the presence of subAB, including the specific detection of both allelic variants, for the presence of saa, tia and sab, and for stx subtyping. Overall, subAB genes were detected in 71.2% of the strains: 84.1% of the strains from deer and 33.3% of the strains from wild boar. Most of them (97.6%) possessed subAB2 and most of these subAB2-positive strains (92.7%) were also positive for tia and negative for saa, suggesting the presence of the subAB2-harbouring PAI. Subtype stx2b was present in most of the strains (67.8%) and a statistically significant association could be established between subAB2 and stx2b. Our results suggest that large game animals, mainly deer, may represent an important animal reservoir of subAB2-positive, eae-negative STEC, and also highlight the risk of human infection posed by the consumption of large game meat and meat products.
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Affiliation(s)
- Sergio Sánchez
- Unidad de Enterobacterias, Servicio de Bacteriología, Centro Nacional de Microbiología, Instituto de Salud Carlos III, 28220 Madrid, Spain.
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