Personne : Guay, Frédéric
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Université Laval. Département des sciences animales
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- PublicationAccès libreNatural sources of polyphenols as feed additives to improve rabbit meat quality(Éditeur non identifié, 2018-08-12) Kone, Amenan Prisca Nadege; Desjardins, Yves; Gosselin, André; Cinq-Mars, Dany; Abdelwahed, Mohamed Z.; Saucier, Linda; Guay, Frédéric
- PublicationAccès librePositive modulation of meat microbial ecology by feeding strategies(2016-08-14) Kone, Amenan Prisca Nadege; Gagné, Dominic; Cinq-Mars, Dany; Saucier, Linda; Guay, FrédéricThe objective of this work was to determine if it is possible to modulate carcass/meat contamination by feeding farm animals with a diet supplemented with a protective culture, here Carnobacterium maltaromaticum CB1/UAL307 producing three bacteriocins, including carnocyclin A. A total of 144 weaned Grimaud female rabbits (a commercial meat breed) were divided into two feeding groups: 1) a control commercial diet and 2) the same diet supplemented with Micocin®, a commercial preparation of C. maltaromaticum CB1, at a final concentration of 8-log CFU (Colony Forming Unit) per kg of feed. Rabbits were fed their respective diet until they reached a commercial slaughter weight of 2.2 kg. Presence of C. maltaromaticum producing carnocyclin A was confirmed by PCR amplification for three specific genes. Its prevalence was greater in faeces, on thighs and in ground meat from rabbits fed the ration supplemented with Micocin®. These results demonstrate that the microflora of the feed can influence the organisms contaminating the end products and emphasized the importance of providing farm animals with high microbial quality feed and hygienic conditions to grow.
- PublicationAccès libreApplication of Carnobacterium maltaromaticum as a feed additive for weaned rabbits to improve meat microbial quality and safety(Applied Science Publishers., 2017-10-02) Kone, Amenan Prisca Nadege; Zea, Juliana Maria Velez; Gagné, Dominic; Cinq-Mars, Dany; Saucier, Linda; Guay, FrédéricThis study addresses the improvement of meat microbial quality by enriching the diet of farm animals with a protective culture. Weaned Grimaud rabbits were divided into two experimental groups: a control and a diet supplemented with Micocin® (Carnobacterium maltaromaticum CB1; 8 Log10 CFU/kg of feed). Overall, meat quality was not affected substantially by the treatment. Total Aerobic Mesophilic (TAM), Escherichia coli and other coliforms, Enterobacteriaceae, Staphylococcus aureus, Pseudomonas spp., Listeria spp. and presumptive lactic acid bacteria counts were evaluated on whole thighs stored under aerobic (0, 3, 6, 8 days) and anaerobic (0, 5, 10, 15, 20 days) conditions at 4 °C. The results demonstrated that the microflora on refrigerated thighs was modulated by the addition of Micocin® (P < 0.05) and that the most effective reduction of Listeria monocytogenes growth was observed with ground meat stored under anaerobic conditions at 4 °C with a 2 Log difference at the end of a 15-day storage (P = 0.025).
- PublicationAccès librePlant extracts and essential oil product as feed additives to control rabbit meat microbial quality(2018-12-23) Kone, Amenan Prisca Nadege; Desjardins, Yves; Gosselin, André; Cinq-Mars, Dany; Saucier, Linda; Guay, FrédéricThe present work evaluated the effects of feed supplementation with plant extracts (onion, cranberry) and a commercial essential oil product (Xtract™) on rabbit meat quality. Five groups of 48 weaned Grimaud female rabbits each received a control ration (C) or a diet supplemented with onion extract (500 or 1000 ppm), cranberry extracts (500 ppm) and essential oil product (100 ppm) alone or in combination. Microbiological quality was evaluated on whole hind legs stored under aerobic and anaerobic conditions at 4 °C. Growth performances, feed intake and both meat composition and quality were similar amongst the experimental groups. Anyhow, meat total phenolic content was significantly higher in all supplemented ones (P < 0.001). Diet supplementation effect was observed (P < 0.05) and microbial control was improved more importantly under anaerobic conditions, notably for Total Aerobic Mesophilic counts, presumptive Pseudomonas and Enterobacteriaceae (P < 0.03). Overall, supplementation with onion extract (500 ppm) suppressed microbial growth more effectively.