Monday, September 1, 2025
Young Scientist Meeting with Coffee Break |
2.00 pm-6.00 pm
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Welcome words from Patrick Trieu-Cuot, Director of Scientific Affairs, and Michel Popoff |
6.00 pm-6.15 pm
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Opening Keynote |
6.15 pm-7.15 pm
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1
6.15 pm |
New perspectives on Clostridioides difficile infection: host dynamics and disease risk
Dena Lyras Infection and Immunity Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, Australia
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''Aperitif'' and Early Welcome Dinner |
7.15 pm-9.00 pm
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Tuesday, September 2, 2025
Welcome coffee |
08.30 am-09.00 am
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Session 1: One Health |
09.00 am-10.30 am
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Chairs: Eliane De Oliveira Ferreira, Universidade Federal Do Rio de Janeiro, Brazil - Christina Tran, Anses, France |
2
09.00 am |
Environmental niches and transmission dynamics of Clostridioides difficile: an underestimated One Health Dimension
Maja Rupnik National Laboratory for Health, Environment and Food, Maribor, Slovenia University of Maribor, Faculty of Medicine, Maribor, Slovenia
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3
09.30 am |
Botulism outbreaks in livestock and wildlife: Assessing public health risks through a One Health approach
Caroline Le Maréchal Unité HQPAP, Laboratory of Ploufragan-Plouzané-Niort, ANSES, Ploufragan, France
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4
09.50 am |
Comparing the severity of Clostridium perfringens-induced gas gangrene in normal vs. diabetic mice
Francisco Uzal University of California-Davis, San Bernardino, United States
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5
10.10 am |
Potency test of the first commercial vaccine for prevention of Clostridioides difficile infection in piglets
Rodrigo Otávio Silva Federal University of Minas Gerais (Brasil), Belo Horizonte, Brazil
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Coffee Break |
10.30 am-11.00 am
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Session 2: Microbiota |
11.00 am-1.00 pm
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Chairs: Aimee Shen, Tufts University School of Medicine, United States - Afi Akofa Diane Sapa, Micalis Institute, Université Paris Saclay, France |
6
11.00 am |
Unraveling the complexities of Clostridioides difficile and Clostridium perfringens Infections: toxigenic profiles and microbiome disruption in latin America
Marina Munoz Instituto de Biotecnología- UN (IBUN), Universidad Nacional de Colombia, Bogotá, Colombia Centro de Investigaciones en Microbiología y Biotecnología – UR (CIMBIUR), Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia
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7
11.30 am |
Enterococcus faecalis alters phase variation in Clostridioides difficile
Ashley Weiss Division of Protective Immunity, Children's Hospital of Philadelphia, Philadelphia, United States
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8
11.50 am |
A sugar-rich diet promotes Clostridioides difficile carriage without prior antibiotics and significantly exacerbates both acute disease and long-term colonization
Daniel Erickson Microbiology & Immunology, University of Louisville, Louisville, United States
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9
12.10 pm |
Bacteroides spp impact Clostridioides difficile growth and toxin production in dual species biofilms
Meera Unnikrishnan University of Warwick, Coventry, United Kingdom
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10
12.30 pm |
Genomic and virulence traits associated with preterm infant-derived Clostridium perfringens strains
Raymond Kiu University of Birmingham, Department of Microbes, Infection and Microbiomes, College of Medicine and Health, United Kingdom
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Session 3: Phage & surface |
2.30 pm-4.20 pm
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Chairs: Paula Salgado, Newcastle University, Newcastle Upon Tyne,, United Kingdom - Anirudh Jakhmola, University of Sheffield, United Kingdom |
11
2.30 pm |
Controlling phage–Host dynamics: safeguarding beneficial bacteria and targeting pathogens
Louis-Charles Fortier Department of Microbiology and Infectious Diseases, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec, Canada
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12
3.00 pm |
PSII, S-layer pillars is essential for Clostridioides difficile life
Léa Huet BaPS, Institut Micalis, Université Paris-Saclay, INRAE, AgroParisTech, Jouy-En-Josas, France
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13
3.20 pm |
Dissecting the biosynthetic pathway of the flagellin Type A glycan in Clostridioides difficile strain 630Δerm
Paul Hensbergen Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
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14
3.40 pm |
Extreme structural diversification of the C. difficile S-layer exoskeletons
Anna Barwinska-Sendra Medical School, Biosciences Institute, Newcastle University, Newcastle Upon Tyne, United Kingdom
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15
4.00 pm |
An unusual mechanism of action of β-lactam antibiotics in Clostridioides difficile
Johann Peltier Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Gif-Sur-Yvette, France
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Coffee Break (Group photo) |
4.20 pm-5.00 pm
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Posters Session I |
5.00 pm-7.00 pm
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Dinner on your own |
7.00 pm-10.00 pm
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Wednesday, September 3, 2025
Welcome coffee |
08.30 am-09.00 am
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Session 4: Toxins |
09.00 am-10.50 am
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Chairs: Andreas Rummel, Hannover Medical School, Germany - Shannon Kordus, Vanderbilt University Medical Center, United States |
16
09.00 am |
Botulinum neurotoxins: a distinct subclass of SNARE-cleaving endopeptidases
Sabine Pellett University of Wisconsin, Department of Bacteriology, Madison, United States
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17
09.30 am |
Botulinum neurotoxins exploit host digestive proteases to boost their oral toxicity via activating OrfXs/P47
Rongsheng Jin School of Medicine, University of California, Irvine, Irvine, United States
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18
09.50 am |
Structural basis of C. difficile TcdB toxin inhibition by intestinal bile acids informs design of a therapeutic antitoxin
Roman Melnyk University of Toronto, Toronto, Canada
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19
10.10 am |
Clostridial hemolysin beta-pore-forming toxins find their receptors
Jan Franzen Department of Infectious Diseases and Pathobiology, Institute of Animal Pathology, Posthaus Lab, University of Bern, Bern, Switzerland Graduate School for Cellular and Biomedical Sciences, Bern, Switzerland
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20
10.30 am |
Intestinal low dose of botulinum neurotoxins facilitate infection by Salmonella and Shigella
Ornella Rossetto Biomedical Sciences, University of Padova, Padova, Italy Institute of Neuroscience, National Research Council, Padova, Italy
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Coffee Break |
10.50 am-11.20 am
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Session 5: Host response to infection |
11.20 am-1.10 pm
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Chairs: Michael Abt, University of Pennsylvania, United States - Aurélie Lotoux, Institut Pasteur Paris, France |
21
11.20 am |
Type 2 Immunity Protection from C. difficile Infection
William Petri University of Virginia, Charlottesville, United States
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22
11.50 am |
Spatial transcriptomic landscape of the colon repairing from Clostridioides difficile infection
Ashleigh Rogers Department of Microbiology, Monash University, Clayton, Australia Infection and Immunity Program, Monash University, Clayton, Australia
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23
12.10 pm |
An in vivo genetic selection identifies Clostridioides difficile gene products targeted by the host immune response
Sarah Price Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, United States Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, Tennessee, United States
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24
12.30 pm |
Potentially therapeutic antibodies are encoded by the C. difficile infection-induced human memory B cell compartment despite the predominance of non-protective antibodies
Sydney Honold University of Oklahoma Health Sciences Center, Oklahoma City, United States
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25
12.50 pm |
FMT promotes type 2 mucosal immune responses with colonic epithelium proliferation in recurrent CDI patients
G. Brett Moreau Infectious Diseases and International Health, University of Virginia, Charlottesville, United States
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Planned Activities / Free time / Dinner on your own |
2.30 pm-11.00 pm
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Thursday, September 4, 2025
Welcome coffee |
08.30 am-09.00 am
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Shimizu Lecture |
09.00 am-09.15 am
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Speaker: Bruce McClane, University of Pittsburgh, United States |
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Session 6: Regulation |
09.15 am-10.45 am
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Chairs: Franziska Faber, University of Würzburg, Germany - Martin Douglass, Vanderbilt University Medical Center, United States |
26
09.15 am |
The complex regulatory network controlling Clostridioides difficile infectious cycle in response to oxidative stress
Isabelle Martin-Verstraete Institut Pasteur, Université Paris Cité, UMR CNRS 6047, Laboratoire Pathogenèse des Bactéries Anaérobies, Paris, France
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27
09.45 am |
Cracking the mechanism of EndoM: how it degrades small RNA and controls sporulation initiation in Clostridioides difficile
Diogo Martins ITQB NOVA, Oeiras, Portugal
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28
10.05 am |
Flagella and toxins reduce Clostridioides difficile fitness in an inflammation-dependent manner
Nicole Gadda Microbiology & Immunology, The University of North Carolina at Chapel Hill, Chapel Hill, United States
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29
10.25 am |
BrnQ branched-chain amino acid transporters affect toxin production of Clostridium perfringens gas gangrene type A strain ATCC3624
Jihong Li Department of Microbiology and Molecular Genetics, University of Pittsburgh, Pittsburgh, United States
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Coffee Break |
10.45 am-11.15 am
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Session 7: Physiology |
11.15 am-12.45 pm
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Chairs: Stephen Melville, Virginia Tech, United States - Valerija Parthala, University of Hertofrdshire, United Kingdom |
30
11.15 am |
A conserved switch controls virulence, sporulation, and motility in C. difficile
Shonna McBride Department of Microbiology and Immunology, Emory University School of Medicine, Emory Antibiotic Resistance Center, Atlanta, United States
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31
11.45 am |
Surface-driven physiological adaptations promote Clostridioides difficile colonization
Po-Long Hsiao Institute of Bioengineering and Global Health Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
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32
12.05 pm |
90 years of Stickland reaction: How clostridial amino acid reductases obtain their pyruvoyl cofactor
Wulf Blankenfeldt Structure and Function of Proteins, Helmholtz Centre for Infection Research, Braunschweig, Germany
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33
12.25 pm |
Gut mucin fucosylation dictates the entry of botulinum toxin complexes
Takuhiro Matsumura Department of Bacteriology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
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Lunch & Poster Session II |
12.45 pm-3.00 pm
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Session 8: Spore |
3.00 pm-4.30 pm
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Chairs: Adriano O. Henriques, ITQB NOVA, Portugal - Abigail Roberts, University of Sheffield, United Kingdom |
34
3.00 pm |
Spores in contrast: stereoflexible and bile-driven germination in Clostridium
Ian Cheong Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore
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35
3.30 pm |
Inter-species contact-dependent suppression of Clostridioides difficile sporulation requires Enterococcus pili
Alicia Wood Binghamton University, Binghamton, United States
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36
3.50 pm |
A plasmid-encoded protein modulates sporulation in Paraclostridium sordellii
Sarah Revitt-Mills Infection and Immunity Program, Monash Biomedicine Discovery Institute and Department of Microbiology, Monash University, Clayton, Australia
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37
4.10 pm |
Strand swapping in the LolA-like protein GerS promotes CwlD amidase activity and spore germination in Clostridioides difficile
Jacob Bouchier Molecular Biology and Microbiology, Tufts University, Boston, United States
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Coffee Break |
4.30 pm-5.00 pm
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Session 9: Clinical |
5.00 pm-6.25 pm
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Chairs: Julian Hurdle, Texas A&M Health Science Center, United States - Houdaii Khalil, Monash University, Australia |
38
5.00 pm |
Human Gut Microbiome Resiliency Vs Oral Antibiotics
Kevin Garey University of Houston College of Pharmacy, Houston, United States
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39
5.30 pm |
The Receptor binding domain 2 (RBD2) of binary toxin (CDT) as a promising vaccine candidate protects both mice and hamsters against CDI challenge
Xingmin Sun Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, United States
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40
5.50 pm |
Mucosal vaccination of inactivated Clostridioides difficile toxins and novel surface antigens clears colonization and promotes host survival
Audrey Thomas Department of Pathology, Microbiology, & Immunology, Vanderbilt University Medical Center, Nashville, United States Microbe-Host Interactions PhD Program, Vanderbilt University, Nashville, United States
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41
6.10 pm |
An overview of the incidence of C. difficile infection around the world, with a focus on France
Jennifer Moisi Pfizer, United States
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Closing of the meeting |
6.30 pm-6.40 pm
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Congress Dinner (Meeting point : 2 port Debilly, 75016 Paris) |
7.45 pm-11.59 pm
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