AFLATOXIN B1 ADSORPTION BY ACTIVE AND INACTIVE Pichia kudriavzevii ISOLATED FROM THE AVIAN ENVIRONMENT

MARINA CELESTE RODRÍGUEZ; MARIA DEL PILAR MONGE; ALEJANDRA P. MAGNOLI

BELO HORIZONTE

Congreso; XVI Encontro Nacional de Micotoxinas; 2018

Aflatoxins are toxic secondary metabolites, produced by fungi of the genus Aspergillus and Penicillium that are usually found as contaminants in raw materials used for the manufacture of animal feed. The exposure of poultry to low and continuous doses of these toxins results in chronic aflatoxicosis; characterized by producing important economic losses due to its negative influence on the productive parameters. One of decontamination strategies currently use is the incorporation of absorbent materials in poultry diets in order to eliminate toxins through its adsorption along the gastrointestinal tract. The aim of this study was to determine the influence of heat treatment of Pichia kudriavzevii on the Aflatoxin B1 (AFB1) adsorption isotherm and their interaction with a nutritional component present in the feeds. A strain of P. kudriavzevii isolated from feeds was used as adsorbent. The quantification of AFB1 was performed by HPLC with fluorescence detection. Changes in the adsorption pattern after thermal treatment of the yeast were observed. The presence of methionine did not substantially affect the adsorption capacity, independently of the adsorbent treatment. A plausible explanation of the experimental facts is provided.