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Doctoral Thesis
DOI
https://doi.org/10.11606/T.42.2010.tde-05082010-113928
Document
Author
Full name
Monica Mattos dos Santos Simas
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2010
Supervisor
Committee
Correa, Benedito (President)
Albuquerque, Ricardo de
Sabato, Susy Frey
Sabino, Myrna
Taborda, Carlos Pelleschi
Title in Portuguese
Efeitos da radiação gama sobre microbiota fúngica e micotoxinas encontradas em ração de frangos de corte.
Keywords in Portuguese
Aspergillus
Fusarium
Frangos de corte
Radiação gama
Abstract in Portuguese
O objetivo do presente trabalho foi determinar o impacto do uso da radiação gama no controle de fungos toxigênicos e micotoxinas (aflatoxinas e fumonisinas) presentes na ração de frangos de corte. Os resultados de produtividade, rendimento, hematologia e bioquímica dos animais indicam que a irradiação da ração com 5 kGy foi efetiva no sentido de controlar os efeitos deletérios das micotoxinas. Amostras irradiadas apresentaram menor contaminação fúngica do que aquelas não irradiadas, no entanto as dose de 5 ou 10 kGy não provocaram redução do nível de contaminação de aflatoxinas ou fumonisinas pré-existentes nas amostras. Pode-se concluir que a dose de 5 kGy seria a mais indicada para o tratamento das rações de aves. Apesar de não alterar os níveis de micotoxinas presentes nas amostras, esta dose induz redução significativa da microbiota fúngica e altera a digestibilidade da ração, o que faz com que frangos alimentados com rações irradiadas com 5kGy apresentem melhor desempenho ao término do período de criação comercial.
Title in English
Effects of gamma radiation on fungal microbiota and mycotoxins in broiler chicken feed.
Keywords in English
Aspergillus
Fusarium
Broiler chickens
Gamma radiation
Abstract in English
The purpose of this experiment was to determine the impact of gamma radiation on the control of toxigenic fungi and mycotoxins (aflatoxin and fumonisin) found in broiler chicken feed. Results show that irradiation of feed with 5 kGy was effective on the control of deleterious effects caused by mycotoxins on performance parameters, hematological and biochemical values. Irradiated samples presented lower fungal contamination levels than those not irradiated, although radiation doses used in this experiment did not reduce aflatoxin and fumonisins levels previously found on the samples. We concluded that 5 kGy is the recommended dose for broiler´s feed. Despite the fact that it does not change the mycotoxin levels found in the samples, this dose significantly reduces the fungal microbiota and modifies the feed digestibility, increasing the final weight of broiler chickens.
 
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Publishing Date
2010-09-17
 
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