Browsing Faculté de médecine vétérinaire by Author "Fravalo, Philippe"
Now showing items 1-8 of 8
-
Characterisation of InlA truncation in Listeria monocytogenes isolates from farm animals and human cases in the province of Quebec
Fravalo, Philippe; Tamazight, Cherifi; Neira Feliciano, Kersti Dina; Letellier, Ann; Fairbrother, Julie-Hélène; Bekal, Sadjia (2017-06)The introduction of Listeria monocytogenes into the food production chain is a concern, with numerous grouped cases of listeriosis associated with milk-derived or pork-derived products have been documented. Management of this zoonotic pathogen considers ... -
Chicken Caecal Microbiome Modifications Induced by Campylobacter jejuni Colonization and by a Non-Antibiotic Feed Additive
Thibodeau, Alexandre; Fravalo, Philippe; Yergeau, Étienne; Arsenault, Julie; Lahaye, Ludovic; Letellier, Ann (2015-07)Campylobacter jejuni is an important zoonotic foodborne pathogen causing acute gastroenteritis in humans. Chickens are often colonized at very high numbers by C. jejuni, up to 109 CFU per gram of caecal content, with no detrimental effects on their ... -
Dynamics of viral distribution in a defined swine production network using enteric viruses as molecular markers
Lachapelle, Virginie; Letellier, Ann; Fravalo, Philippe; Brassard, Julie; L’Homme, Yvan (2017-02)Modern swine production systems represent complex and dynamic networks involving numerous stakeholders. For instance, livestock transporters carry live animals between fattening sites, abattoirs, and other premises on a daily basis. This interconnected ... -
Extensive characterization of Campylobacter jejuni chicken isolates to uncover genes involved in the ability to compete for gut colonization
Thibodeau, Alexandre; Fravalo, Philippe; Taboada, Eduardo N.; Laurent-Lewandowski, Sylvette; Guévremont, Èvelyne; Quessy, Sylvain; Letellier, Ann (2015-05)Background: Campylobacter jejuni is responsible for human foodborne enteritis. This bacterium is a remarkable colonizer of the chicken gut, with some strains outcompeting others for colonization. To better understand this phenomenon, the objective ... -
Genetic diversity of group A rotavirus in swine in Canada
Lachapelle, Virginie; Sohal, Jagdip Singh; Lambert, Marie-Christine; Brassard, Julie; Fravalo, Philippe; Letellier, Ann; L'Homme, Yvan (2014-01-09)Group A rotaviruses (RVA) in pigs have been poorly investigated in Canada. In a continued effort to fill this gap, ten finisher swine farms in Quebec, Canada, were sampled over a nine-month period. The presence of RVA was detected in healthy pigs on ... -
Impact of mash feeding versus pellets on propionic/butyric acid levels and on total Escherichia coli load in the gastrointestinal tract of growing pigs
Longpré, Jessie; Fairbrother, J.M.; Fravalo, Philippe; Arsenault, Julie; LeBel, P.; Laplante, B.; Surprenant, C.; Massé, D.; Letellier, Ann (2016-03)Feed characteristics may influence the bacterial community composition and metabolic activities in the pig gastrointestinal tract, known to be associated with positive effects on the gut. Use of mash feed is associated with reduced Salmonella ... -
Impact of Nutrient Restriction on the Structure of Listeria monocytogenes Biofilm Grown in a Microfluidic System
Cherifi, Tamazight; Jacques, Mario; Quessy, Sylvain; Fravalo, Philippe (2017-05-17)Biofilm formation by the pathogen Listeria monocytogenes is a major concern in food industries. The aim of this work was to elucidate the effect of nutrient limitation on both biofilm architecture and on the viability of the bacteria in ... -
Survival in water of Campylobacter jejuni strains isolated from the slaughterhouse
Trigui, Hana; Thibodeau, Alexandre; Fravalo, Philippe; Letellier, Ann; Faucher, Sebastien P. (2015-01)Campylobacter jejuni cause gastroenteritis in humans. The main transmission vector is the consumption or handling of contaminated chicken meat, since chicken can be colonized asymptomatically by C. jejuni. However, water has been implicated as the ...