Table 7.
Effect of gum Arabic (GA) on cecal microbiota of male broiler chickens on d 10 of age.
| Parameters 1 | GA Levels, % | SEM 2 | p-Value 3 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 0.00 | 0.12 | 0.25 | 0.50 | 0.75 | 1.00 | GA | L | Q | ||
| Aerobic | 11.4 | 11.4 | 11.4 | 11.5 | 11.5 | 11.6 | 0.25 | 0.970 | 0.770 | 0.790 |
| Escherichia coli | 7.9 b | 8.2 b | 7.7 b | 8.4 b | 8.5 b | 8.6 a | 0.20 | 0.010 | 0.060 | 0.440 |
| Salmonella Typh. | 8.9 a | 9.0 a | 7.9 b | 8.0 b | 7.9 b | 8.0 b | 0.27 | 0.009 | 0.020 | 0.110 |
| Anaerobic | 10.9 | 11.1 | 11.7 | 12.0 | 11.9 | 11.9 | 0.37 | 0.180 | 0.040 | 0.220 |
| Clostridium perfringens | 11.1 | 11.3 | 10.9 | 11.5 | 11.5 | 11.6 | 0.32 | 0.620 | 0.410 | 0.760 |
| Lactobacillus spp. | 9.9 c | 10.5 b | 11.0 a | 11.1 a | 11.3 a | 11.1 a | 0.19 | 0.001 | 0.001 | 0.001 |
| Lactobacillus/Escherichia coli | 1.3 b | 1.3 b | 1.5 a | 1.3 b | 1.3 b | 1.3 b | 0.03 | 0.030 | 0.050 | 0.010 |
a,b Means that do not share a common superscripted letter within a row for each parameter differ significantly from those of the basal diet (0.0%), as determined by the Dunnett test (p < 0.05). 1 colonies were counted using a colony counter and the results were expressed as log10 colony forming units per gram. 2 SEM = Standard error of means for diet effect. 3 GA = gum Arabic response; L = linear response; Q = quadratic response.