Guillaume Larivière-Gauthier

	Transfer of Salmonella spp. in pig production, impact of intestinal flora components of the sow on the modulation of excretion of this bacterium Like the French expression says, everything is good in swine. That’s why we must ensure the safety of its meat. Despite the efforts of the swine industry, salmonellosis is still frequently associated with the consumption of pork. Indeed, this bacteria can be carried asymptomatically in pigs and contaminate the meat during slaughter. My thesis focuses on the study of the transfer of Salmonella between the sow, which can be a reservoir of the pathogen, and the piglet. I will also study the impact of the gut microbiota which is transferred from the sow to the piglet on the colonization and shedding of the bacteria throughout the production. By getting a better understanding of these phenomena, we will be better able to advise the industry on methods to implement to reduce contamination of animals on the farm and hence reduce the contamination of pork in your plate.   Read more
PhD in veterinary science, animal health and food safety option	Supervisor: Philippe Fravalo
Academic Background : Bachelor's degree in biology, microbiology and immunology option Masters in veterinary science, animal health and food safety option

Awards:

• 2015 : Bourse de congrès du CRIPA
• 2015 : Bourse de congrès du GREZOSP
• 2014 : Bourse de la Cité de la biotechnologie agroalimentaire, vétérinaire et agroenvironnementale de St-Hyacinthe
• 2010 : Bourse d'excellence en production porcine de la Fédération des producteurs de porc du Québec

Scientific publications:

Scientific articles

1. Larivière-Gauthier G., A. Thibodeau, A. Letellier, É. Yergeau, P. Fravalo. Reduction of Salmonella Shedding by sows during gestation in relation to its fecal microbiome. Front Microbiol. 2017 Nov 10;8:2219. Doi: 10.3389/fmicb.2017.02219

2. Thibodeau, A., A. Letellier, E. Yergeau, G. Larivière-Gauthier, P. Fravalo. Lack of evidence that Selenium-yeast improves chicken health and modulates the caecal microbiota in the context of colonisation by Campylobacter jejuni. Frontiers in microbiology. 2017 Mar 17;8:451. Doi: 10.3389/fmicb.2017.00451

3. Larivière-Gauthier G., S. Quessy, S. Fournaise, A. Letellier, P. Fravalo. Different Stainless Steel Types Used for Equipment do not Affect the Initial Microbial Transfer from Pork Skin Including Pathogens. Canadian Journal of Veterinary Research. Can J Vet Res. 2015 Jul;79(3):255-9. 
4. Larivière-Gauthier G., A. Letellier, A. Kérouanton, S. Bekal, S. Quessy, S. Fournaise, P. Fravalo. Analysis of Listeria monocytogenes strains distribution in a pork slaughter and cutting plant in the province of Quebec. Journal of food protection. Number 12, December 2014, pp. 2012-2218, pp. 2121-2128(8)

Published abstracts (conference proceedings)

1. Larivière-Gauthier Guillaume, A. Thibodeau, A. Letellier, É. Yergeau, P. Fravalo
   Fecal flora composition of piglets depends on the Salmonella excretion of the sows. 
   10e Symposium du CRIPA.  20 et 30 mai 2017.  St-Hyacinthe, Québec, Canada
2. Larivière-Gauthier G., A. Letellier, É. Yergeau, B. Laplante, P. Fravalo. Evolution of the faecal microbiome of the sow during the gestation and its impact on Salmonella excretion. Symposium on gut health in production of food animals. 2015, November 9-11th . Kansas city, Missouri, USA
3. Larivière-Gauthier G., A. Letellier, B. Laplante, P. Fravalo. Evolution of Salmonella excretion by sows during gestation in link with the faecal flora characterisation. 11e Congrès Safepork, 2015, September 8-10th, Porto, Portugal
4. Larivière-Gauthier G., A. Letellier, S. Quessy, S. Fournaise et P. Fravalo. Assessment of the efficiency of ozonated water as bacterial contamination reduction tool in a pork cutting plant. Safepork 2013, September 9-12th , Portland, Maine, USA
5. Larivière-Gauthier G., A. Letellier, A. Kerouanton, S. Fournaise, S. Quessy, P. Fravalo. An investigation of Listeria monocytogenes in a Quebec pork cutting and slaughtering plant using RFLP-PFGE. CRIP 2012, Faculté de médecine vétérinaire, Saint-Hyacinthe, Québec, Canada
   
   
   

Posters

1. Larivière-Gauthier G., A. Letellier, B. Laplante, P. Fravalo. Évaluation de la variation de l’excrétion de Salmonella chez la truie au cours de la gestation. 8e Symposium du CRIPA, 21-22 mai 2015, Saint-Hyacinthe, Québec, Canada.
2. Larivière-Gauthier G., A. Letellier, A. Kerouanton, S. Quessy, S. Fournaise, P. Fravalo. Analyse par RFLP PFGE de la distribution de Listeria monocytogenes dans un abattoir/découpe de porc au Québec. AQIA 2012, Lévis (Qc), Canada.
3. Larivière-Gauthier G., A. Letellier, S. Quessy, S. Fournaise et P. Fravalo. Le type d’acier inoxydable n’affecte pas le transfert bactérien. Journée de la recherche 2012, Faculté de médecine vétérinaire, St-Hyacinthe, Qc, Canada
4. Larivière-Gauthier G., A. Letellier, S. Quessy, S. Fournaise et P. Fravalo. Evaluation of ozonated water as a microbiological risk mitigation option in pork production. Safepork, Maastricht, Pays-bas, 2011, June.
5. Larivière-Gauthier G., P. Fravalo, G. Desmarais, S. Fournaise, S. Quessy, A. Letellier. Industrially relevant mitigation options to control Salmonella in pork during lairage at slaughterhouse. Congrès I3S 2010, St-Malo, France.