Óleo-resina de copaíba e extrato de barbatimão na dieta de poedeiras comerciais infectadas por Escherichia coli
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2015-04-17
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Universidade Federal de Goiás
Resumo
The present study was performed to evaluate the supplementation of copaiba oleo resin or
barbatimão extract in the diet of laying hens challenged with Escherichia coli. A total of 200
Isa Brown laying hens (64-76 weeks old) were used, and all the birds were intravaginally
inoculated with 0.5 mL of 0.85% sterile saline solution containing 8.8 x 109 CFU / mL of
Escherichia coli. It was adopted the randomized complete block design (birds weight used as
block criteria), with four treatments and five replicates of 10 birds. The treatments consisted
of: basal diet without additives (control); basal diet + 30 mg / kg of antibiotic (halquinol);
basal diet + 30 mg / kg of copaiba oleo resin and basal diet + 40 mg / kg barbatimão extract.
The experiment lasted three periods of 28 days. At the end of each period, the performance
and the external and internal egg quality were evaluated as the search for the presence of
Escherichia coli in eggs; and at the end of the total period, the search for Escherichia coli in
ovarian follicles and oviduct. Data were subjected to analysis of variance and means, when
necessary, were compared by Tukey test (5%). For the Escherichia coli searching in eggs,
follicles and oviduct, it was applied descriptive analysis (absolute and relative frequency).
The inclusion of 40 mg / kg diet of barbatimão extract lead to worse feed conversion than the
control treatment and decreased egg production compared to antibiotic treatment. The
addition of 30 mg / kg diet of copaiba oleo resin did not influence the hens performance. The
use of barbatimão extract lead to production of heavier eggs, and worse shell thickness and
internal quality (UH) when compared to antibiotic treatment. Egg weight, the albumen
percentage and the yolk index in the treatment with copaiba oleo resin were better than those
of antibiotic treatment. However, the inclusion of copaiba oleo resin resulted in a lower yolk
percentage when compared to antibiotic treatment. There was a lower frequency of isolation
of Escherichia coli in intra-vaginal swabs samples from treatment with copaiba. The inclusion
of barbatimão or copaiba provided lower frequency of isolation of E. coli in ovarian follicles
in relation to antibiotic treatment. There was a lower frequency of isolation of E. coli in the
oviduct with the addition of barbatimão extract when compared to antibiotic treatment. The
treatment with copaiba oleo resin showed higher frequency of isolation of E. coli in the
oviduct than the other treatments. The use of copaiba oleo resin or barbatimão extract resulted
in lower frequency of isolation of Escherichia coli in the shell, albumen and yolk samples, in
relation to antibiotic treatment. The inclusion of copaiba oleo resin may be an alternative to
antibiotics in laying hens commercial diets.
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BARBOSA, Aleane Francisca Cordeiro. Óleo-resina de copaíba e extrato de barbatimão na dieta de poedeiras comerciais infectadas por Escherichia coli. 2015. 68 f. Dissertação (Mestrado em Zootecnia) - Universidade Federal de Goiás, Goiânia, 2015.