Ramón Estévez, Josué NicolásRestrepo Botero, Juan EstebanRuíz, TatianaOlivera Ángel, Martha2012-04-092012-04-0920111794-4449http://hdl.handle.net/10567/143Introducction. To Characterize the way milk is produced in a farm and study the factors that affect its quality. Objectives. know, identify and characterize the critical points in which microbial contamination can take place in a mechanic milking system located in the North of Antioquia. Materials and methods. Departing from a repetitive observation to the milking routine a flowchart was made, identifying three moments of the routine: The pre-milking, the milking and the post-milking. By this observation it was determined that the most possible places for contamination were the routine of washing or the contact with the milker´s gloves. Samples were taken and cultivated in 3M Petrifilm™ and Bactoscan® plates for the milk samples and for the water samples the plate count for mesophiles was used. Result. The results showed that a cleaning and disinfection routine for the milking Machine is correct, but cleaning and disinfection of the nipples must be improved because they contaminate the milking cup and this, consequently, contaminate the measurers. Finally, the bacteria will fall into the cold tank. Discussion. CFU in tank, at this farm, have a media of 218.40 b ± 74,00, it means they are above the bonus ranks according to the 000012 resolution of January 12 th , 2007.esProducción de lecheCorporación Universitaria LasallistaLeche - Control de calidadLeche - Equipos y accesoriosArticle