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Detection of Campylobacter sp. from Poultry Feces in Ouagadougou, Burkina Faso

Food and Nutrition Sciences 2021年第2期12卷 107-114页

作者： Assèta Kagambèga Alexandre Thibodeau Daniel K. Soro Nicolas Barro philippe fravalo Laboratoire de Biologie Moléculaire d’épidémiologie et de surveillance des bactéries et virus transmissibles par les aliments (LaBESTA)/Ecole Doctorale Sciences et Technologies (EDST)/Université Joseph KI-ZERBOOuagadougou Burkina Faso Institut Des Sciences (IDS) Ouagadougou Burkina Faso Veterinary Medicine Faculty Department of Pathology and Microbiology NSERC Industrial Research Chair in Meat-Safety (CRSV) University of Montreal Saint-Hyacinthe QC Canada

Background: Campylobacter contamination in poultry and poultry product has been reported worldwide. The present study aims to determine the prevalence of Campylobacter in poultry feces using selective enrichment Bolton broth and multiplex PCR. Method: Two methods were used in this study: the first was direct plating of poultry feces into mCCDA agar plates. The second, three antibiotics were used at different concentrations to add in Bolton broth supplemented. These antibiotics were Rifampicin (Oxoid, Nepean, Ontario) with 10 mg/L, colistin (Oxoid, Nepean, Ontario) with 1 mg/mL and 2 mg/mL;trimethoprim (Oxoid, Nepean, Ontario) with 10 mg/L. The colonies with typical campylobacter morphology on blood agar (little, red and

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Modification of Campylobacterjejuni Broiler Colonization by a Feed Additive Composed of Encapsulated Organic Acids and Essential Oils

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Journal of Agricultural Science and Technology(A) 2014年第10期4卷 853-864页

作者： Alexandre Thibodeau philippe fravalo Robert Gauthier Evelyne Guevremont Nadia Bergeron Sylvette Laurent-Lewandowski Sylvaln Quessy Martine Boulianne Ann Letellier Department of Pathology and Microbiology University of Montreal Saint-Hyacinthe Quebec J2S 2M2 Canada Food Research and Development Centre Agriculture and Agri-Food Canada Saint-Hyacinthe Quebec J2S 8E3 Canada JEFO Nutrition Inc. Saint-Hyacinthe Quebec J2S 7B6 Canada

The objective of this study was to evaluate the effect of a novel feed additive on chicken intestinal colonization and carcass contamination by Campylobacter jejuni. The feed additive was composed of microencapsulated organic acids and essential oils (OA/EO). The feed additive tested was provided by Jefo Nutrition Inc., St-Hyacinthe, Quebec, Canada. Day-old birds were separated into two rooms and subdivided into two groups. Chicken were fed with OA/EO or not fed with OA/EO until they reached 35 d of age. At 14 d of age, chickens received an oral suspension of two well characterized C. jejuni strains, depending on the room they were housed in. The levels of C. jejuni were periodically monitored in the caecum and on the carcasses. C. jejuni colonization was further characterized by the use of high-resolution melt analysis of the C. jejuni flaA gene (HRM-flaA). The effect of the feed additive was strain-dependent. In room two, the feed additive had no effect on the caecal counts. In room one, at 35 d of age, caecal C. jejuni counts were higher with OA/EO, as opposed to carcasses counts which were lower in the treated group. The HRM-flaA analysis showed that an amplification profile was predominant in birds fed with OA/EO at 35 d of age in room one, suggesting the selection of a C. jejuni strain. In conclusion, the OA/EO seemed to be effective to reduce C. jejuni levels but this effect appeared strain dependent.

关键词：饲料添加剂空肠弯曲菌有机酸肉鸡组成挥发油封装改性

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