Effect of three mycotoxin adsorbents on growth performance, nutrient retention and meat quality in broilers fed on mould-contaminated feed

Abstract

1. A study was conducted to investigate the effects of an esterified glucomannan (EGM), a hydrated sodium calcium aluminosilicate (HSCAS) and a compound mycotoxin adsorbent (CMA) on performance, nutrient retention and meat quality in broilers fed on mould-contaminated feed. Mould-contaminated diets were prepared by replacing half of the non-contaminated maize in the basal diets with mould-contaminated maize, which contained 450·6 µg/kg of aflatoxin B1, 68·4 µg/kg of ochratoxin A and 320·5 µg/kg of T-2 toxin. 2. The mould-contaminated diet significantly decreased body weight gain (BWG) between 10 and 21 d, feed intake (FI) between 35 and 42 d, the apparent retention of crude lipid and phosphorus, and the lightness (L*) value of breast and thigh muscle. It also significantly increased the redness (a*) and yellowness (b*) value in breast muscle and the b* value in thigh muscle. 3. The addition of 0·2% HSCAS significantly increased FI between 35 and 42 d and the apparent retention of phosphorus. Supplementation with 0·1% CMA in the contaminated diet significantly improved BWG from 10 to 21 d, and increased FI from 35 to 42 d and from 10 to 42 d. CMA also significantly increased the apparent retention of crude lipid, crude protein, ash and phosphorus. All three mycotoxin-adsorbent treatments significantly improved the L* values of breast and thigh muscle when compared with the mould-contaminated group. Supplementation with 0·1% CMA in the contaminated diet significantly decreased b* value and improved tenderness in thigh muscle. 0·05% EGM significantly decreased b* value of thigh muscle compared to mould-contaminated group. 4. The results indicated that mycotoxins in contaminated feed retard growth, nutrient retention and meat quality, whereas the addition of 0·05% EGM, 0·2% HSCAS or 0·1% CMA prevents the adverse effects of mycotoxins to varying extents, with 0·1% CMA being the most effective adsorbent treatment.

Effect of esterified glucomannan on broilers exposed to natural mycotoxin-contaminated diets

“…The improving role of 0.05% E-GM to neutralize the deleterious effects of mycotoxicosis on performance has been previously reported by Aravind et al (2003) and Modirsanei et al (2004). On the contrary, Liu et al (2011) failed to improve the chickens' performance by 0.05% E-GM supplementation. Both liver and bursa of Fabricius relative weights were affected by mycotoxins contamination.…”

“…Afterward, a natural condition, 23-28°C temperature and 68-85% humidity was used to culture the wet corn until an obvious mildew appeared. Finally, the contaminated corn was airdried naturally, mixed and sample was taken for subsequent analysis (Liu et al 2011). The concentration of different toxins in corn and feed samples, including Aflatoxin (B1, B2, G1 and G2), DON, OTA and zearalenone, was determined using HPLC according to Yang et al (2012).…”

“…Furthermore, chronic mycotoxicosis resulted from minor levels of mycotoxin exposure, not necessarily occur accompanied by clinical symptoms. These chronic impacts affect animals' performance and immunity as well as increase toxin residues in poultry meat and egg (Resanović et al 2009;Liu et al 2011). Aflatoxin, ochratoxin (OTA) and deoxynivalenol (DON) are among the most important feed contaminants.…”

“…Due to the similar conditions that fungal species produce their second metabolites, existence of mycotoxins in the nature rarely manifests as a single contaminant. Additionally, several grain sources are the constituents of usual poultry diets which might be contaminated by different mycotoxins (Liu et al 2011). Ingestion of mycotoxins causes unwanted biological effects inside animal and human organisms and leads to carcinogenic, oestrogenic and immunosuppressive condition.…”

Effects of yeast based toxin binder supplementation on growth performance and intestinal microarchitecture in male buffalo calves (Bubalus bubalis) exposed to different concentrations of Aflatoxin B1.

“…Impairments in the intestinal mucosa caused by AFB1 decreases its nutrient absorbing ability (Liu et al, 2011). Villus surface area depends upon the dimensions of villus (Hou et al, 2012), and higher growth rates are associated with greater villus Handley et al, 2001), caused by AFB1.…”