Use of neem (Azadirachta indica) as a substitute for antimicrobial drugs in broiler chickens’ feed
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Data
2019
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Editor
Luiz Augusto Batista Brito
Resumo
In the present work, we carried out an experiment aiming at evaluating the use of Neem as an
antimicrobial substance in the feeds of broiler chickens. We used 240 one-day-old Cobb broiler chicks
distributed in an entirely casual design, with 4 treatments, 6 repetitions and 10 birds per experimental
unit, during a 21-day experimental period. Treatments consisted of a basal diet with no antimicrobial
inclusion, a diet with 0.05% of tylosin, and a diet with 0.05% and 0.1% of Neem. Parameters evaluated
were zootechnical performance, feed digestibility, intestinal count of Salmonella sp. and Escherichia
coli, and the development of lymphoid organs. Data on the performance and metabolization of nutrients
were subjected to an ANOVA and averages were compared with a post-hoc Tukey test considering
α=0.05. Data on E. coli counts were analyzed with a Kruskal-Wallis test. Neem did not influence
performance variables. The metabolization coefficient of dry matter and feed ethereal extract was
better with tylosin (P<0.05). No growth of Salmonella was observed during the experiment. The
use of Neem did not reduce E. coli population and had no influence on lymphoid organs’ weight.
Therefore, Neem had no effect on the performance, digestibility and intestinal microbiota of birds up
to 21 days old.
Descrição
Palavras-chave
Additive, Phytogenic additives, Bird nutrition, Intestinal health, Aditivo, Aditivos fitogênicos, Nutrição de aves, Saúde intestinal
Citação
ASSUNÇÃO, Patrícia da Silva; MELLO, Heloísa Helena de Carvalho; MASCARENHAS, Alessandra Gimenez; ANDRADE, Maria Auxiliadora; TEIXEIRA, Karla Andrade; OLIVEIRA, CARVALHO, Deborah Pereira. Use of neem (Azadirachta indica) as a substitute for antimicrobial drugs in broiler chickens’ feed. Ciência Animal Brasileira, Goiânia, v. 20, p. 1-9, e52588, 2019.