Enzyme addition facilitates the post-disease compensatory growth of broiler chickens challenged with Clostridium perfringens

Abstract

. 2009. Enzyme addition facilitates the post-disease compensatory growth of broiler chickens challenged with Clostridium perfringens. Can. J. Anim. Sci. 89: 369Á381. In vitro incubation studies using a multicarbohydrase supplement showed a significant depolymerization of nonstarch polysaccharides (NSP) of soybean meal (SBM), canola meal and flaxseed meal, which was associated with the production of water-soluble NSP hydrolysis products. Effects of diet type and enzyme addition on growth performance of broiler chickens were investigated in a Clostridium perfringens challenge (10 9 CFU bird (1 on day 14) study. A total of 2640 male chickens were assigned to six treatments (wheat/SBM, unchallenged; wheat/SBM challenged; wheat/SBM'enzyme, challenged; wheat/flaxseed, unchallenged; wheat/flaxseed, challenged; wheat/flaxseed'enzyme, challenged). When compared with the wheat/SBM-based diets, birds fed flaxseed-containing diets had a decreased final body weight, an inferior overall feed conversion ratio (FCR), and an increased intestinal digesta viscosity (PB0.01). Pathogen challenge caused mucosal lesions and increased (PB0.05) the incidence of necrotic enteritis mortality with the highest mortality rate observed in birds fed the flaxseed diet without enzyme. Enzyme addition decreased (PB0.05) the overall FCR from 1.88 to 1.77 and from 1.96 to 1.86 in challenged birds fed wheat/SBM and flaxseed-containing diets, respectively. In conclusion, feeding flaxseed had adverse effects on growth performance, and enzyme addition improved the nutritive value of flaxseedcontaining diets, and facilitated the post-disease compensatory growth of chickens after C. perfringens challenge. . L'ajout d'un enzyme facilite la croissance de compensation apre`s la provocation des poulets de chair avec Clostridium perfringens Can. J. Anim. Sci. 89: 369Á381. Les essais d'incubation in vitro qui recourent a`un supple´ment fait de carbohydrases multiples re´ve`lent une importante de´polyme´risation des polysaccharides non amylace´s (PNA) des tourteaux de soja (TS), de canola et de lin, avec pour re´sultat la synthe`se des de´rive´s hydrosolubles de l'hydrolyse des PNA. Les auteurs ont examine´quels effets la ration et un supple´ment enzymatique avaient sur la croissance de poulets de chair provoque´s avec Clostridium perfringens (10 9 UFC par volatile le 14 e jour). En tout, 2 640 sujets de sexe maˆle ont e´te´re´partis entre 6 traitements (ble´/TS, sans provocation; ble´/TS, avec provocation; ble´/TS'enzyme, avec provocation; ble´/lin, sans provocation; ble´/lin, avec provocation; ble´/lin' enzyme, avec provocation). Comparativement aux rations ble´/TS, les oiseaux nourris avec les rations renfermant du lin e´taient moins gros a`la fin de l'expe´rience, se caracte´risaient par un indice de consommation infe´rieur et avaient des digest plus visqueux dans l'intestin (P B0,01). La provocation avec la bacte´rie pathoge`ne entraıˆne des le´sions aux muqueuses et augmente (PB0,05) le taux de mortalite´par ente´rite ne´crotique, le taux le plus e´leve´e...

Feeding flaxseed enhances deposition of omega-3 fatty acids in broiler meat portions in different manner

“…The effects of flaxseed on growth performance and the incidence of necrotic enteritis in broiler chickens have recently been reported by our group (Jia et al 2009). In this study, a pelleted diet containing 12% of flaxseed was fed to broiler chickens for the entire production cycle (0-37 d).…”

“…(1 metabolizable energy and 20% crude protein in the grower phase (Jia et al 2009). In both phases of the experiment, the contents of ALA averaged 0.44 and 2.57%, respectively, for wheat/ barley/soybean meal-based diets without and with flaxseed addition.…”

Effects of Xylanase Supplementation and Citric Acid on Performance, Ileal Nutrients Digestibility, and Gene Expression of Intestinal Nutrient Transporters in Broilers Challenged with <i>Clostridium perfringens</i>

“…It has been well documented that feeding wheat-based diets supplemented with xylanase lowers bacterial counts, especially in the small intestine (Jia et al, 2009). Therefore, it seems that the xylanase enzyme reduces microbe-host competition for nutrients.…”

“…Research has shown that the use of diets formulated with wheat containing non-starch polysaccharides (NSP) predisposes broilers to NE (Jia et al, 2009). While the mechanism by which NSP predisposes birds to NE is unclear, the effects that NSP have on broiler performance, nutrient digestion and absorption, and digesta viscosity have been extensively reported (Choct et al, 1999;Annett et al, 2002).…”

The similarity of the effect of carbohydrase or prebiotic supplementation in broilers aged 21 days, fed mixed cereal diets and challenged with coccidiosis infection

“…Non-starch polysaccharide (NSP) is a group of large molecules found in cereal grains such as wheat and barley which are used in poultry diets and have negative effects on growth performance and nutrient utilisation caused by an increase in digesta viscosity [1]. In order to minimise these negative effects carbohydrase enzymes such as xylanase are added to cereal diets to hydrolyse NSP [2] and, in doing so, there is evidence to suggest that in-situ prebiotic oligosaccharides are generated [3][4].…”