Authors : A. Cordova-Izquierdo , J. Saltijeral Oaxaca , G. Ruiz Lang , S. Cortes Suarez , V. Manuel Xolalpa Campos , Silvia D. Pena Betancourt , M. Silvia Cordova-Jimenez , C. Alejandro Cordova-Jimenez , J. Felix Perez-Gutierrez and J. Eulogio Guerra Liera
Abstract: The Aflatoxins (AF) they are the group of more studied mycotoxins, they are classified in aflatoxins B1, B2, G1 and G2; metabolized to aflatoxins M1 and M2, also called secondary metabolites of aflatoxins, they are harmful in quantities appearances - µg kg-1 or parts for trillion, pb. They are in the milk in form of metabolic residual. The aflatoxins doesn`t have flavor, scent, they are fluorescent under the ultraviolet light and they are resistant to high temperatures, to more than 320° C, so the cooking process or pasteurization doesn`t exterminate them. Aflatoxins can be detected without the presence of the producing mushroom, since this inactivate can be had by chemical processes or for alteration of environmental factors, but I didn`t seize to the aflatoxin or mycotoxin that it can remain in the sustrate. Mainly the Aflatoxin B1 (AFB1), it is directly related with the Aflatoxin M1 (AFM1), since it is the one derived 4-hidroxi of AFB1 and excreted in the milk during the nursing process in form of secondary metabolites, in the females cows that AFB1 consumes in the diet. Between the 0.3 and 6.2% of the present AFB1 in the food, it is biotransformation to AFM1 and excreted in the milk. For what a lineal relationship exists among the levels of AFB1 in polluted food and the content of AFM1 in the milk. Therefore the contamination of the milk for toxic metabolites, aflatoxin M1 takes place during the concentration of sharp or chronic consumption of polluted food with aflatoxin B1. The objective of this research was to identify the Aflatoxin presence M1 (AFM1) in milk of collection tank in a stable of the State of Hidalgo, Mexico. They took five samples directly of the collection tank with interval of one week, which were analyzed by means of the method of chromatography of liquids (AOAC) for the identification of AFM1. At the same time, he/she was carried out a multiple toxicological analysis of micotoxinas for chromatography in fine layer from the proportionate diet to the animals. The results obtained by means of AOAC were 225 parts for trillion (ppb), Non detectable (N/C), 332ppb, 167ppb and N/C. The obtained results of the food, they went negative to AFB1. These results indicate that the presence of AFM1 in milk, is previously related with the consumption of polluted food with AFB1, that which presents a problem of public health for the consumers; a solution alternative is to change the polluted food with AFB1 for one that is not.
A. Cordova-Izquierdo , J. Saltijeral Oaxaca , G. Ruiz Lang , S. Cortes Suarez , V. Manuel Xolalpa Campos , Silvia D. Pena Betancourt , M. Silvia Cordova-Jimenez , C. Alejandro Cordova-Jimenez , J. Felix Perez-Gutierrez and J. Eulogio Guerra Liera , 2007. Identification of M1 Aflatoxin in Milk of the Collector Tank. Journal of Animal and Veterinary Advances, 6: 194-197.