Ácidos orgânicos no controle de Salmonella Enteritidis em frangos de corte desafiados experimentalmente com Salmonella Enteritidis e Eimeria tenella
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2009-03-27
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Universidade Federal de Goiás
Resumo
This experiment was carried out using 504 one-day-old Hubbard female chicks, in
order to evaluate the effect of a mixture of organic acids added to the ration, on
the control of Salmonella in birds experimentally confronted with S. enteritidis and
S. enteritidis associated with Eimeria tenella. The birds were distributed following a
totally randomized sequence in factorial way 3x2, added or not the organic acid to
the ration and the presence of challenge with S. enteritidis and E. tenella, isolated
S. enteritidis or without challenge at all, totalizing six treatments with six repetitions
each one, using 14 birds by experimental unit. The statistic data was analyzed
using the program SAS, adopted to compare the averages, the Tukey test
(quantitative variables) and Kruskal-Wallis (qualitative variables) to p< 0,05. The
birds that received organic acid enriched ration had improvement in the
performance at 7, 21 and 28 days. The birds inoculated only with S. enteritidis and
the birds inoculated with S. Enteritidis and E. tenella presented worse levels of
zootecnic performance (p<0,05) at 21, 28 and 35 days of life. The spleen weight
and the thin intestine and cecum pH were not influenced (p>0,05) by the addition
of organic acids to the ration. All the treatments challenged with S. enteritidis and
which received acids presented minor frequency of bacteria isolation in the
analyzed organs. It was also observed a reduction on the number of oocists of E.
tenella in the excretes and in the cecum content in the treatments which had
organic acids, as well as reduction of intestinal damage scores caused by infection
with E. tenella. The organic acids promoted improvement on the zootecnic
performance on cut chicken, improving intestinal health with positive
consequences on control of S. enteritidis together with Eimeria tenella
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Citação
CALAÇA, Gracinda Mariana. Ácidos orgânicos no controle de Salmonella Enteritidis
em frangos de corte desafiados experimentalmente com
Salmonella Enteritidis e Eimeria tenella. 2009. 69 f. Dissertação (Mestrado em Ciências Agrárias - Veterinaria) - Universidade Federal de Goiás, Goiânia, 2009.