Abstract
In a beef cattle feedlot for human consumption, located in San Agustin village, Calamuchita department, Córdoba, Argentina, a marked mortality rate took place during the months of February 2013 to June 2014. Weather conditions were atypical for the area and season; there were high temperatures, droughts followed by periods of excess moisture and rain. The ration animals were fed with was composed of corn, alfalfa hay, corn burlanda, gluten feed, peanut shells and sunflower pellet. Affected animals presented various symptoms such as dyspnea, hemoglobinuria and hematuria, lack of coordination, death and, in many cases, sudden death. Bovines underwent necropsy by which jaundice, hepatitis with focal necrosis, gallbladder edema, hemoglobinuria, hematuria and kidney necrosis were found. The content of aflatoxins and ochratoxins (OTA) in the ration was determined, detecting a high amount of OTA which may have been the cause of cattle mortality.
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