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by
A.C. Murry |
Total Records (
2 ) for
A.C. Murry |
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A.C. Murry
,
Jr.
,
A. Hinton
,
Jr.
and
H. Morrison
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Two dominant strains of lactobacilli isolated from a botanical probiotic were identified and evaluated to determine their ability to inhibit the in vitro growth of E. coli, S. typhimurium, and C. perfringens on a medium that simulated a normal starter and grower diet for broiler chickens. The two strains identified were Lactobacillus salivarius and Lactobacillus plantarum. In the inhibition assay in vitro, both strains of Lactobacillus from the probiotic inhibited (P < 0.001) growth of E. coli, S. typhimurium, and C. perfringens for both the starter and grower diets when compared to the control diets. Both strains of Lactobacillus for both the starter and grower diets produced more (P < 0.001) acetic and lactic acid than was found in the control diets. Also, the pH of the media with cultures of L. plantarum and L. salivarius for both the starter and grower diets was lower (P < 0.001) than for the control diets. These results indicate that L. salivarius and L. plantarum contained in the botanical probiotic can ferment carbohydrates in poultry feed to produce pH levels and concentrations of lactic and acetic acid that inhibit the growth of E. coli, S. typhimurium, and C. perfringens. |
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A.C. Murry
,
Jr.
,
A. Hinton
,
Jr.
and
R.J. Buhr
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This study was conducted
to examine the effect of feeding a botanical probiotic (Feed Free™)
containing Lactobacillus on growth performance of broiler chickens
from 1 to 42 d of age. At 56 d, five broilers per pen were killed and
processed to determine bacteria populations in the ceca, cloaca, and
carcass rinse. The dietary treatments were the basal diet with coccidiostat
and antibiotic (control), basal diet without coccidiostat and antibiotic
(negative control) and basal diet supplemented with 0.10% probiotic.
The results showed that body weights and average weight gain were not
different (P > 0.05) due to treatment. Feed intake and feed to gain
ratio from 22 to 42 d of age were lower (P < 0.001) for broilers fed
0.10% probiotic than broilers fed the control diets. The population
of Lactobacilli recovered from cloaca contents was higher (P
< 0.002) and the population of Clostridium perfringens recovered
from cloaca contents was lower (P < 0.02) for broilers fed the 0.10%
probiotic diet than for those fed the control diets. The population
C. jejuni recovered from carcass rinses for broilers fed the
diet supplemented with the probiotic tended (P < 0.11) to be lower when
compared to the negative control. These results suggest that diets supplemented
with the botanical probiotic containing Lactobacillus supports
growth for broilers similar to the basal diet supplemented with antibiotic
and coccidiostat, and with lower feed to gain ratio. Also, the botanical
probiotic may reduce C. perfringens and C. jejuni in market-age
broilers. |
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