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THE EFFECTS OF PROBIOTIC SUPPLEMENTATION IN WEANED PIGS DIET FACULTY OF VETERINARY MEDICINE, BELGRADE UNIVERSITY Dragan efer, Stamen Radulovi, Radmila Markovi, Dobrila Jaki-Dimi affect gut microflora by altering metabolism of the microrganisms subtherapeutic levels of antibiotics have been in use for over fifty years!! suppress microbial growth in the gut

ANTIBIOTICS better growth production results However... negative effects on animals health and production residua in tissues and long withdrawal period ANTIBIOTICS development of resistance in miocroorganisms allergies and

genotoxicity European Parliament and Council Regulation (EC, No 1831/2003) from 22. septembar 2003 Antibiotics can be used as a feed addittives only before 31. december of 2005 Great interest for development of new alternatives that would help in manipulation of gastrointestinal microflora in livestock living microorganmisms which induce EUBIOSIS PROBIOTICS beneficial effects in animal organism Aggregation to pathogenic bacteria Competation at adherence site Nutritive competition between microorganisms Bactericide effects Prevention of Coliform bacteria and other bacteria from attaching to the intestinal wall

FEEDING TRIAL The experiment included 24 pigs (Landrace x Yorkshire) Commercial conditions of rearing Weaned at age of 35 days Distributed randomly in two feeding treatments The experiment lasted 40 days Animals were fed with identical commercial complete corn - soybean based diets with a standard chemical composition C E-I Corn 53 53 Soybean meal

18 18 Soybean grit 19 19 Premix 10 10 - + Growth stimulator

Raw composition of diets up to BW 15 kg (%) C E-I Corn 60 60 Soybean meal 15 15 Soybean grit 15 15

Premix 10 10 - + Growth stimulator Raw composition of diets for BW 15 25 kg (%) GROUP GROWTH STIMULATOR PROBIOTIC C E-I

- 0,4 kg/t Probiotic is comercial product comprised of a mixture of spray-dried spore-forming B. subtilis and B. licheniformis (3.2 109 viable spores/g) The chemical composition of the diet for pigs up to 15 kg, % C E-I Water 11,21 11,20 Ash 3,24

3,30 Protein 20,94 20,90 Fat 6,20 6,15 Cellulose 3,58 3,55 Starch

54,83 54,90 Ca 0,95 0,94 P 0,68 0,66 ME, MJ/kg 14,35 14,32 Lysine

1,44 1,44 Methionine+cystine 0,72 0,72 Tryptophan 0,31 0,31 The chemical composition of the diet for pigs 15 - 25 kg, % C E-I Water

11,50 11,42 Ash 2,92 2,94 Protein 18,66 18,60 Fat 5,73 5,70

Celullose 3,43 3,40 Starch 57,76 57,94 Ca 0,90 0,89 P 0,66 0,64

ME, MJ/kg 14,21 14,18 Lysine 1,27 1,27 Methionine+cystine 0,64 0,64 Tryptophan 0,28

0,28 GROWTH PRODUCTION RESULTS Body weight* of pigs during the experiment, kg Days of the experiment C E-I 1. 8,532,20 8,541,51 20. 13,204,04 13,942,93 40.

25,326,31 27,984,76 *The value is expressed as X Sd 30 25 20 1. day 20. day 40. day 15 10 5 0

C O-I 10,51% more The average body weight of pigs during experiment, (kg) GROWTH PRODUCTION RESULTS Average daily gain of pigs during experiment, kg Period of experiment C E-I 1-20. 0,230,15 0,270,10 20-40.

0,610,13 0,700,13 1-40. 0,420,12 0,490,09 *The value is expressed as X Sd 0.7 0.6 0.5 0.4 1-20 0.3 1-40

20-40 0.2 0.1 0 C E-I 16,67% more The average daily body weight gain during the experiment, kg GROWTH PRODUCTION RESULTS Average daily feed consumption, kg Period of experiment C E-I 1-20.

0,49 0,53 20-40. 1,29 1,38 1-40. 0,89 0,96 1.4 1.2 1 1-20 20-40

1-40 0.8 0.6 0.4 0.2 C E-I 7,86% more Average daily feed consumption during experiment, (kg) GROWTH PRODUCTION RESULTS Feed to gain ratio during experiment Period of experiment C E-I

1-20. 2,130 1,963 20-40. 2,115 1,971 1-40. 2,119 1,959 2.2 2.1 2 1-20 20-40

1-40 1.9 1.8 1.7 1.6 1.5 C E-I 7,55 % lower Feed to gain ratio during experiment MORPHOMETRIC ANALYZES Morphometric characteristics * of jejunum (m) OBSERVED PARAMETER C E-I

Villi length 498,1112,5 C 732,7117,3 C Villi width 66,518,70 C 84,2317,76 C Crypt depth 166,855,26 159,960,04

*The value is expressed as X Sd C p<0,001 750 700 650 600 Villi lenght 550 500 450 400 C E-I Length of the villi in the tested segment of jejunum

90 80 70 Villi width 60 50 C E-I The width of the villi in the tested segment of jejunum Obtained results indicate that the use of probiotic as alternative growth promoter has nutritive, medical and economic advantages THANK YOU FOR YOUR ATTENTION

DEPARTMANT OF NUTRITION AND BOTANY FACULTY OF VETERINARY MEDICINE BELGRADE UNIVERSITY

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