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Uruén C, Fernandez A, Arnal JL, Del Pozo M, Amoribieta MC, de Blas I, Jurado P, Calvo JH, Gottschalk M, González-Vázquez LD, Arenas M, Marín CM, Arenas J. Genomic and phenotypic analysis of invasive Streptococcus suis isolated in Spain reveals genetic diversification and associated virulence traits. Vet Res 2024; 55:11. [PMID: 38268053 PMCID: PMC10807230 DOI: 10.1186/s13567-024-01267-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 01/02/2024] [Indexed: 01/26/2024] Open
Abstract
Streptococcus suis is a zoonotic pathogen that causes a major health problem in the pig production industry worldwide. Spain is one of the largest pig producers in the world. This work aimed to investigate the genetic and phenotypic features of invasive S. suis isolates recovered in Spain. A panel of 156 clinical isolates recovered from 13 Autonomous Communities, representing the major pig producers, were analysed. MLST and serotyping analysis revealed that most isolates (61.6%) were assigned to ST1 (26.3%), ST123 (18.6%), ST29 (9.6%), and ST3 (7.1%). Interestingly, 34 new STs were identified, indicating the emergence of novel genetic lineages. Serotypes 9 (27.6%) and 1 (21.8%) prevailed, followed by serotypes 7 (12.8%) and 2 (12.2%). Analysis of 13 virulence-associated genes showed significant associations between ST, serotype, virulence patterns, and clinical features, evidencing particular virulence traits associated with genetic clusters. The pangenome was generated, and the core genome was distributed in 7 Bayesian groups where each group included a variable set of over- and under-represented genes of different categories. The study provides comprehensive data and knowledge to improve the design of new vaccines, antimicrobial treatments, and bacterial typing approaches.
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Affiliation(s)
- Cristina Uruén
- Unit of Microbiology and Immunology, Faculty of Veterinary, University of Zaragoza, Zaragoza, Spain
- Institute Agrofood of Aragón-IA2, University of Zaragoza-Center of Research and Technology of Aragón (CITA), Zaragoza, Spain
| | - Ana Fernandez
- Exopol. Veterinary Diagnostic and Autogenous Vaccine Laboratory, San Mateo de Gállego, Zaragoza, Spain
| | - José Luis Arnal
- Exopol. Veterinary Diagnostic and Autogenous Vaccine Laboratory, San Mateo de Gállego, Zaragoza, Spain
| | | | | | - Ignacio de Blas
- Institute Agrofood of Aragón-IA2, University of Zaragoza-Center of Research and Technology of Aragón (CITA), Zaragoza, Spain
- Unit of Infectious Diseases, Faculty of Veterinary, University of Zaragoza, Zaragoza, Spain
| | - Paula Jurado
- Unit of Microbiology and Immunology, Faculty of Veterinary, University of Zaragoza, Zaragoza, Spain
- Institute Agrofood of Aragón-IA2, University of Zaragoza-Center of Research and Technology of Aragón (CITA), Zaragoza, Spain
| | - Jorge Hugo Calvo
- Department of Animal Science, Center of Research and Technology of Aragón CITA, Zaragoza, Spain
- ARAID, Saragossa, Spain
| | - Marcelo Gottschalk
- Research Group on Infectious Diseases in Production Animals and Swine and Poultry Infectious Diseases Research Centre, Faculty of Veterinary Medicine, University of Montreal, Saint-Hyacinthe, QC, Canada
| | | | - Miguel Arenas
- Department of Biochemistry, Genetics and Immunology, University of Vigo, Vigo, Spain
- CINBIO, Vigo, Spain
| | - Clara M Marín
- Institute Agrofood of Aragón-IA2, University of Zaragoza-Center of Research and Technology of Aragón (CITA), Zaragoza, Spain
- Department of Animal Science, Center of Research and Technology of Aragón CITA, Zaragoza, Spain
| | - Jesús Arenas
- Unit of Microbiology and Immunology, Faculty of Veterinary, University of Zaragoza, Zaragoza, Spain.
- Institute Agrofood of Aragón-IA2, University of Zaragoza-Center of Research and Technology of Aragón (CITA), Zaragoza, Spain.
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Bossé JT, Li Y, Fernandez Crespo R, Lacouture S, Gottschalk M, Sárközi R, Fodor L, Casas Amoribieta M, Angen Ø, Nedbalcova K, Holden MTG, Maskell DJ, Tucker AW, Wren BW, Rycroft AN, Langford PR. Comparative sequence analysis of the capsular polysaccharide loci of Actinobacillus pleuropneumoniae serovars 1-18, and development of two multiplex PCRs for comprehensive capsule typing. Vet Microbiol 2018; 220:83-89. [PMID: 29885806 PMCID: PMC6008488 DOI: 10.1016/j.vetmic.2018.05.011] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 05/18/2018] [Accepted: 05/19/2018] [Indexed: 11/15/2022]
Abstract
Problems with serological cross-reactivity have led to development of a number of PCRs (individual and multiplex) for molecular typing of Actinobacillus pleuropneumoniae, the causative agent of porcine pleuropneumonia. Most of these assays were developed for detection of specific amplicons within capsule biosynthetic genes before the availability of complete sequences for the different serovars. Here we describe comparative analysis of the complete capsular loci for all 18 serovars of A. pleuropneumoniae, and development of two multiplex PCRs for comprehensive capsule typing of this important pig pathogen.
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Affiliation(s)
- Janine T Bossé
- Section of Paediatrics, Department of Medicine, Imperial College London, St. Mary's Campus, London, UK.
| | - Yanwen Li
- Section of Paediatrics, Department of Medicine, Imperial College London, St. Mary's Campus, London, UK
| | - Roberto Fernandez Crespo
- Section of Paediatrics, Department of Medicine, Imperial College London, St. Mary's Campus, London, UK
| | - Sonia Lacouture
- Groupe de Recherche sur les Maladies Infectieuses du Porc, Faculté de Médecine Vétérinaire, Université de Montréal, Québec, Canada
| | - Marcelo Gottschalk
- Groupe de Recherche sur les Maladies Infectieuses du Porc, Faculté de Médecine Vétérinaire, Université de Montréal, Québec, Canada
| | - Rita Sárközi
- Department of Microbiology and Infectious Diseases, University of Veterinary Medicine, Budapest, Hungary
| | - László Fodor
- Department of Microbiology and Infectious Diseases, University of Veterinary Medicine, Budapest, Hungary
| | | | - Øystein Angen
- Department of Microbiology and Infection Control, Statens Serum Institut, Copenhagen, Denmark
| | | | | | - Duncan J Maskell
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Alexander W Tucker
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Brendan W Wren
- Faculty of Infectious & Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
| | - Andrew N Rycroft
- Department of Pathology and Pathogen Biology, The Royal Veterinary College, Hawkshead Campus, UK
| | - Paul R Langford
- Section of Paediatrics, Department of Medicine, Imperial College London, St. Mary's Campus, London, UK
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Bossé JT, Li Y, Sárközi R, Fodor L, Lacouture S, Gottschalk M, Casas Amoribieta M, Angen Ø, Nedbalcova K, Holden MTG, Maskell DJ, Tucker AW, Wren BW, Rycroft AN, Langford PR. Proposal of serovars 17 and 18 of Actinobacillus pleuropneumoniae based on serological and genotypic analysis. Vet Microbiol 2018; 217:1-6. [PMID: 29615241 PMCID: PMC5901230 DOI: 10.1016/j.vetmic.2018.02.019] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 02/15/2018] [Accepted: 02/15/2018] [Indexed: 11/30/2022]
Abstract
Identification of two new serovars of Actinobacillus pleuropneumoniae. Serological confirmation of specific reactivity with homologous antisera. Characterization of the capsule loci of serovars 17 and 18. Development of PCRs for molecular diagnostics.
The aim of this study was to investigate isolates of Actinobacillus pleuropneumoniae previously designated serologically either as non-typable (NT) or as ‘K2:07’, which did not produce serovar-specific amplicons in PCR assays. We used whole genome sequencing to identify the capsule (CPS) loci of six previously designated biovar 1 NT and two biovar 1 ‘K2:O7’ isolates of A. pleuropneumoniae from Denmark, as well as a recent biovar 2 NT isolate from Canada. All of the NT isolates have the same six-gene type I CPS locus, sharing common cpsABC genes with serovars 2, 3, 6, 7, 8, 9, 11 and 13. The two ‘K2:O7’ isolates contain a unique three-gene type II CPS locus, having a cpsA gene similar to that of serovars 1, 4, 12, 14 and 15. The previously NT isolates share the same O-antigen genes, found between erpA and rpsU, as serovars 3, 6, 8, and 15. Whereas the ‘K2:O7’ isolates, have the same O-antigen genes as serovar 7, which likely contributed to their previous mis-identification. All of the NT and ‘K2:O7’ isolates have only the genes required for production of ApxII (apxIICA structural genes, and apxIBD export genes). Rabbit polyclonal antisera raised against representative isolates with these new CPS loci demonstrated distinct reactivity compared to the 16 known serovars. The serological and genomic results indicate that the isolates constitute new serovars 17 (previously NT) and 18 (previously ‘K2:O7’). Primers designed for amplification of specific serovar 17 and 18 sequences for molecular diagnostics will facilitate epidemiological tracking of these two new serovars of A. pleuropneumoniae.
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Affiliation(s)
- Janine T Bossé
- Section of Paediatrics, Department of Medicine, Imperial College London, St. Mary's Campus, London, UK.
| | - Yanwen Li
- Section of Paediatrics, Department of Medicine, Imperial College London, St. Mary's Campus, London, UK
| | - Rita Sárközi
- Department of Microbiology and Infectious Diseases, University of Veterinary Medicine, Budapest, Hungary
| | - László Fodor
- Department of Microbiology and Infectious Diseases, University of Veterinary Medicine, Budapest, Hungary
| | - Sonia Lacouture
- Groupe de Recherche sur les Maladies Infectieuses du Porc, Faculté de Médecine Vétérinaire, Université de Montréal, Québec, Canada
| | - Marcelo Gottschalk
- Groupe de Recherche sur les Maladies Infectieuses du Porc, Faculté de Médecine Vétérinaire, Université de Montréal, Québec, Canada
| | | | - Øystein Angen
- Department of Microbiology and Infection Control, Statens Serum Institut, Copenhagen, Denmark
| | | | | | - Duncan J Maskell
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Alexander W Tucker
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Brendan W Wren
- Faculty of Infectious & Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
| | - Andrew N Rycroft
- Department of Pathology and Pathogen Biology, The Royal Veterinary College, Hawkshead Campus, UK
| | - Paul R Langford
- Section of Paediatrics, Department of Medicine, Imperial College London, St. Mary's Campus, London, UK
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