Alimentação de leitoas pré-púberes com dietas contendo aflatoxinas ou zearalenona

Abstract

RESUMOUm experimento foi realizado para avaliar o desempenho, a morfologia vulvar e os pesos de órgãos viscerais e de trato reprodutivo em leitoas pré-púberes alimentadas com dietas contendo aflatoxinas ou zearalenona durante 28 dias. Foram utilizados 18 animais com peso médio inicial de 11 quilogramas. Três tratamentos (dieta controle -DC; DC + 1 mg kg -1 de aflatoxinas; DC + 2 mg kg SUMMARYAn experiment was carried out to evaluate performance, vulvae morphology, visceral organs and reproductive tract weight in pre-puberal gilts fed diets containing aflatoxins or zearalenone during 28 days. Eighteen animals with an average initial weight of 11 kg were used. Three treatments (control diet -CD; CD + 1 mg kg -1 of aflatoxins; CD + 2 mg kg -1 of zearalenone) were utilized in a completely randomized design with six replications. Feed intake, weight gain and final live weight were reduced (p<0.05) by 30% (CD x CD + aflatoxins: 1.087 x 0.758 kg), 27% (0.608 x 0.441 kg) and 16% (27.4 x 22.9 kg) for animals fed diets containing aflatoxins. Feed intake (CD x CD + zearalenone: 1.087 x 0.986 kg), feed conversion ratio (1.85 x 1.86) and final live weight (27.4 x 25.5 kg) were not affected (p>0.05) by zearalenone in comparison to control group. The relative weight of liver and heart were not altered (p>0.05) by mycotoxins. However, zearalenone increased (p<0.05) the bulk of vulva, the length and weight of reproductive tract. Feeding diets with aflatoxins or zearalenone prejudices performance and stimulates estrogenic effects in gilts. INTRODUÇÃOO milho é um ingrediente muito apreciado pela indústria da alimentação animal, especialmente pela sua disponibilidade e qualidade nutricional. Porém, do cultivo ao armazenamento, o milho está sujeito à

Efficacy of a yeast additive to mitigate the effects of zearalenonecontaminated feed in gilts

“…Our results were corroborated by the study of Andretta et al (2010) and Teixeira et al (2011), who reported that ZEA do not significantly affect productivity of the animals.…”

“…They are responsible for considerable losses and adverse effects on animal health and production (Hauschild et al, 2007). Zearalenone (ZEA) is a non-steroidal estrogenic mycotoxin (Andretta et al, 2008;Andretta et al, 2010) …”

Cecal enzyme activity in gilts following experimentally induced Fusarium mycotoxicosis

“…It has been found that at concentrations of 50-100 μg/kg in pig diet, ZEN affects oocyte implantation, ovulation, and fertilization. Similar changes were observed by Andretta et al (2010) and Teixeira et al (2011), who administered ZEN in an amount of 2 mg/kg BW and 0.75 mg/kg BW, respectively. Hyperemia and swelling of the vulva were observed in the first and third weeks of the experiment, respectively.…”

“…ZEN was found to be toxic and carcinogenic. In gilts, experimental administration of ZEN or contaminated fodder at relatively low doses (from 1.5 to 2 ppm) leads to swelling and thickening of the vaginal and vulvar wall, increased uterus mass, and atrophic ovaries, but without the standing reflex (Andretta et al 2010). Rotter et al (1996) demonstrated that the animals most sensitive to DON are pigs.…”