Improved Growth Performance And Carcass Yield In Broilers Biology Essay

The usage of dietetic additives is going a really interesting practise to better carnal wellness and public presentation in domestic fowl production. Thepax® is a prebiotic that includes inactivated Saccharomyces cerevisiae Var. ellipsoideus cells and foods such as vitamins, enzymes, aminic acids and short concatenation polypeptides.

The effects of supplementing diet by Thepax® via drinkable H2O on growing and carcase output were studied in broilers. Two interventions, an active with Thepax® and a control intervention, were used on 120 male and female biddies of the Hubbard JV strain. Birds were divided into 6 groups of 20 birds each managed on floor and received the same starting motor, agriculturist and closer dressed ores based on corn and soybean repast during a 37 yearss test period. Thepax® ( 0.5 milliliter of the additive for 1 liter of H2O ) was used during merely one month. Carcase parametric quantities were determined on 22 biddies at 37 yearss of age and 2032g of unrecorded organic structure weights. Body weight and day-to-day growing rate seemed to increase by 6.2 % and 6.

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4 % , severally, in birds having Thepax® compared to command birds. Feed transition ratio and H2O consumption were similar ( P?0.201 ) for both groups of birds. The consequence of the additive was of import on birds ‘ wellness. The mortality rate decreased ( P=0.

0241 ) by around 71 % in birds having Thepax® compared to that in control birds. Furthermore, the active group of birds deposited ( P = 0.0172 ) less abdominal fat ( -35.2 % ) without impacting carcase output. Positive effects of Thepax® with its construction and composing may be an of import extra beginning of foods supports growing and heighten provender ingredients digestibleness, and good enteric microflora activity in broilers. In decision, Thepax® administered to broilers in potable H2O may better birds ‘ wellness and cut down abdominal fat without compromising carcase output.

Cardinal Wordss: Thepax, broilers, public presentation, carcase.


The usage of antibiotics was out because of their side effects on consumers and the acquired bacterial opposition from prolonged usage of such antibiotics. Therefore, the usage of provender additives as options has recently been widely spread in the poulet industry. Prebiotics are among those feed additives normally used to supplement broilers ‘ rations. They are selectively fermented compounds that affect the composing and/or the action of the GI microflora to better the wellness and good being of the host ( Gibson and Roberfroid, 1995 ) . These prebiotics adversely compete with pathogens ( Biggs et al. , 2007 ) for foods.

They besides enhance enzymatic reactions and cut down ammoniacal and phenolic digestion merchandises. Several surveies focused on supplementing broilers with prebiotics and reported assorted consequences on their effects on production public presentations and wellness of birds. The aim of this test was to analyze the consequence of integrating Thepax® in potable H2O on growing and carcase features in broilers. This prebiotic ( Thepax® ) is made of killed and stabilized suspension of Saccharomyces cerevisiae Var. ellipsoideus in add-on to vitamins, enzymes, aminic acids and short concatenation polypeptides.

MatEriaLS And methods

Fattening essay

A sum of 120 one twenty-four hours old Hubbard JV males and females biddies were used in this essay. Chicks were fattened up to 37 yearss of age. The average organic structure weight at the beginning of the test was 56.23g±0.78. Birds were allotted into two pens, a control ( C ) and an active ( TH ) , where each pen was divided into three homogeneous groups ( 2x3x20 ) .

Birds in the TH group received Thepax® get downing the first twenty-four hours of age at a rate of 0.5 ml/litre of potable H2O during one month. Thepax® is made of killed and stabilized suspension of Saccharomyces cerevisiae Var. ellipsoideus.

It included besides enzymes, vitamins ( B1, B2, B6, B12, PP, pantothenic acid, vitamin H ) , enzymes, aminic acids and minerals ( Ca, Mg, Na, K, phosphor, Cu, Fe, Zn and Mn ) . The pH of Thepax® concentrated was 4.23 but when diluted with H2O the pH of the solution, given to birds, was 6.87. The C group of birds received no linear. All birds were vaccinated against the Gumboro, Infectious Bronchitis and Newcastle diseases. Birds were fed a starter diet during the first three hebdomads and a grower-finisher diet in the staying period.

These dressed ores contained, severally, 60 and 61 % of maize, 35 and 32 % of soybean repast, 0 and 2 % of fat and 5 % of CMV. The ME and CP contents were 2885 and 3000 Kcal/kg and 21 to 19.6 % severally. Measures were taken on day-to-day weight additions ( DWG ) , day-to-day provender consumption ( DFI ) ( g/d/bird ) , feed transition ratio ( FCR ) and mortality rate ( M ) ( % ) . Furthermore, day-to-day H2O consumption ( DWI ) ( ml/d/bird ) was measured during the whole test period and one hebdomad thenceforth.

Butchering essay

At the terminal of the experimental period ( at 37 yearss of age ) 22 male birds homogeneous for unrecorded organic structure weight ( 2kg ± 100 g ) , 10 from the control group and 12 from the TH group were slaughtered to mensurate hot carcase output ( HCY in % ) , chilled carcase output ( CCY in % ) and abdominal fat ( AF in % ) .

Statistical analysis

Treatment effects were compared utilizing a Student trial following a one manner analysis of discrepancy ( SAS, 2001 ) .


Production public presentations

Live organic structure weights, DWG, DFI, FCR and mortality rate are given in table 1.

There were no important differences in the C and TH groups of birds during the whole experimental period. At 37 yearss of age tended to be heavier than control birds. The average organic structure weight of TH birds was around 130g ( ? 6 % ) heavier than control birds but that difference was non important ( p & A ; gt ; 0.05 ) . Mathlouthi et Al. ( 2009 ) and Hadj Ayed et Al. ( 2010 ) found an addition in the mean organic structure weights of biddies having a diet supplemented with yeast prebiotic.

Haj Ayed et Al. ( 2004 ) found an betterment in broilers growing public presentations when fed a regimen supplemented with a Saccharomyces cerevisiae suspension rich in vitamins and aminic acids. Daily feed consumption and FCR were besides comparable between both bird groups ( P ? 0.

4701 ) . Benites et Al. ( 2008 ) found no effects on provender transition between poulets fed a prebiotic compared to those of control birds. During all the fattening period, H2O consumption was non affected by the intervention ( P?0.0733 ) .

On the other manus, overall mortality was reduced in birds having Thepax® ( P = 0.0241 ) up to 71.4 % . Mortality in C groups this essay was chiefly caused by diarrhea during the 3rd hebdomad of age.

Similar consequences were reported by Mathlouthi et Al. ( 2009 ) and Hadj Ayed et Al. ( 2010 ) . Improvement in the wellness position of birds having Thepax® may be explained by the content of the merchandise in barm cell walls which may increase enteric villus development and accordingly exciting broiler immune system ( Zhang and al. 2005 and Flickinger and Fahey, 2002 ) . Furthermore, the diluted Thepax® constitutes a considerable beginning in foods particularly the B vitamins, aminic acids and enzymes which may function as foods to better poulets ‘ wellness.

Thepax® may hold besides a competitory action in favor of good microorganisms and revitalised bowels by restricting the adhesion of pathogen bacteriums to the bowel wall.

Carcass output and abdominal fat

Treatment effects on carcase output and deposited abdominal fat are presented in table 2. The per centum of abdominal fat was lower by around 35.2 % in the Thepax® bird group compared to command birds ( P = 0.0172 ) . Decrease in deposited fat may be caused by the presence of lipases in Thepax® that may better the digestion of lipoids and limit their accretion in the venters.


The supplementation of broilers by Thepax® did non look to impact growing public presentations and feed consumption. However, this provender additive seemed to better birds survival by viing indirectly with pathogens, enhanced the immune system and digestion of foods. Furthermore, the prebiotic Thepax® rich in vitamins, minerals and indispensable amino acids has positively affected carcase quality by cut downing the abdominal fat. Thepax® may be safely used in broilers diets to better wellness and better carcase quality.


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