TABLE 3.
C. perfringens, Enterococcus, and E. coli counts obtained from cecal, cloacal, and litter samplesa
| Bacterium | Day | Sample | Mean CFU/g of sample in treatment
|
SEM | P valueb | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Control | BBM | PEN | SAL | BAC | SAL + BAC | |||||
| C. perfringens | 7 | CE | 2.15 | 2.22 | 2.93 | 0.62 | 1.86 | 1.76 | 0.530 | 0.39 |
| CL | 1.30 | 0.57 | 1.23 | 1.16 | 1.20 | 1.36 | ||||
| 14 | CE | 2.27 | 0.82 | 1.86 | 2.57 | 1.55 | 1.71 | 0.462 | 0.286 | |
| CL | 1.22 | 0.92 | 0.00 | 0.83 | 0.88 | 0.54 | ||||
| 21 | CE | 2.45 | 2.54 | 2.54 | 2.54 | 2.00 | 2.54 | 0.306 | 0.127 | |
| CL | 1.43 | 2.34 | 1.15 | 2.29 | 2.55 | 2.67 | ||||
| 28 | CE | 3.23 | 2.53 | 2.76 | 3.28 | 3.11 | 3.04 | 0.512 | 0.701 | |
| CL | 2.54 | 2.30 | 1.56 | 1.38 | 2.44 | 2.28 | ||||
| 35 | CE | 3.95 | 3.55 | 3.66 | 3.29 | 3.76 | 3.28 | 0.341 | 0.831 | |
| CL | 2.65 | 2.54 | 2.54 | 2.78 | 2.95 | 2.67 | ||||
| Enterococcus spp. | 7 | CE | 9.41 | 9.55 | 8.06 | 7.63 | 7.51 | 8.40 | 0.782 | 0.7047 |
| CL | 5.73 | 5.73 | 5.73 | 5.73 | 5.73 | 5.73 | 0.958 | |||
| 14 | CE | 6.95 | 4.90 | 4.92 | 6.26 | 5.93 | 6.55 | 0.683 | 0.217 | |
| CL | 4.76 | 5.78 | 4.45 | 6.62 | 5.39 | 6.04 | 0.837 | |||
| 21 | CE | 6.50 | 6.52 | 5.66 | 5.68 | 5.81 | 5.23 | 0.512 | 0.173 | |
| CL | 5.87 | 5.40 | 5.49 | 5.20 | 5.50 | 4.20 | 0.627 | |||
| 28 | CE | 6.09 | 5.28 | 5.73 | 4.73 | 5.16 | 5.22 | 0.472 | 0.072 | |
| CL | 4.47 | 5.68 | 3.17 | 3.41 | 4.59 | 4.20 | 0.578 | |||
| 35 | CE | 5.23 | 5.76 | 5.60 | 5.46 | 5.74 | 5.03 | 0.400 | 0.115 | |
| CL | 6.61 | 7.06 | 4.87 | 5.99 | 6.93 | 6.48 | 0.490 | |||
| Litter | 7.86 | 7.45 | 7.60 | 7.28 | 7.80 | 7.47 | 0.28 | 0.671 | ||
| E. coli | 7 | CE | 10.50 | 9.90 | 9.62 | 10.09 | 9.86 | 10.39 | 0.357 | 0.533 |
| CL | 7.22 | 7.32 | 6.98 | 0.26 | 7.28 | 7.60 | 0.437 | |||
| 14 | CE | 8.41 | 8.00 | 8.80 | 8.77 | 7.98 | 8.70 | 0.425 | 0.106 | |
| CL | 6.71 | 5.73 | 6.16 | 6.64 | 5.73 | 7.17 | 0.520 | |||
| 21 | CE | 7.68 | 7.55 | 9.69 | 8.52 | 7.52 | 7.88 | 0.372 | 0.041* | |
| CL | 7.01 | 6.58 | 6.63 | 6.63 | 6.63 | 6.09 | 0.456 | |||
| CE | 7.89 | 8.71 | 9.27 | 7.92 | 9.74 | 8.06 | 0.643 | 0.52 | ||
| CL | 5.93 | 5.24 | 5.81 | 5.71 | 5.95 | 5.73 | 0.788 | |||
| 35 | CE | 9.57 | 8.67 | 9.43 | 8.29 | 9.17 | 9.10 | 0.542 | 0.493 | |
| CL | 6.75 | 6.31 | 6.80 | 6.53 | 7.38 | 6.47 | 0.664 | |||
| Litter | 8.47 | 8.87 | 8.72 | 8.43 | 8.57 | 8.44 | 0.14 | 0.197 | ||
a
Values indicate log10 bacterial counts of C. perfringens, Enterococcus, and E. coli cells obtained from cecal (CE), cloacal (CL), and litter (analyzed on day 35 only) samples of broiler chickens fed diets containing bambermycin (BBM), penicillin (PEN), salinomycin (SAL), bacitracin (BAC), and a salinomycin-bacitracin combination (SAL + BAC) at concentrations specified in Materials and Methods.
b
P values were obtained by analysis of variance. *, values are statistically different (P < 0.05).