What are Symbiotics?
This term is employed for the association between Prebiotics and Probiotics in poultry feeding.
The association between Prebiotics and Probiotics is always beneficial, as shown in Tables 1 and 2.
Table 1 - The efficiency of the association between caecal microflora and oligosaccharides (FOS) in reducing the amount of S. Enteritidis in the caecum of challenged birds at 21 days of age
Treatment |
Time after challenge with S. Enteritidis |
|||||
1 day |
7 days |
14 days |
||||
CFU/g* |
% Pos** |
CFU/g* |
% Pos** |
CFU/g* |
% Pos** |
|
Control |
4,31 |
100% |
3,47 |
80% |
1,54 |
40% |
Microflora |
4,04 |
100% |
1,83 |
60% |
0,40 |
10% |
FOS |
2,45 |
100% |
1,76 |
80% |
0,30 |
20% |
Microflora + FOS |
1,76 |
80% |
0,45 |
30% |
0 |
0% |
(*) Amount of SE / gram caecal contents - Log10;
(**) Percent positives in a total of 10 challenged chicks.
Adapted from: Fukuta et al. J. Food Protec. 1999.
Table 2 - Effect of administering Probiotic (anaerobic caecal culture) to one-day-old chicks, associated or otherwise with lactose, on the intestinal colonisation of bird by Salmonella Enteritidis (SE)
Treatment* |
Infective dose of SE |
Positive for SE / total of 15 birds (Percent of positive bird) |
|
| 10th day | 21st day | ||
| Control Probiotic Lactose Prob + Lact. |
106 106 106 106 |
100 80 100 73 |
100 40 100 47 |
Control |
104 104 104 104 |
93 93 86 0 |
93 27 87 7 |
(*) Lactose supplied at 5% of the feed up to the 21st day;
(**) Challenged with SE on second day of life.
Adapted from Corrier et al. Avian Disease. 1991.