Intoxicação por ureia em touros de corte da raça Bonsmara no distrito de Boane

Abstract

This work is the result of the pre-professional internship carried out in the months of May to September 2022 in the Pathological Anatomy Section (SAP), belonging to the Department of Sanitation and Public Health of the Veterinary Faculty (FAVET). The internship was objective, to acquire experience and consolidate the theoretical-practical knowledge obtained through throughout the course in the area of ​​Veterinary Pathology. The activities carried out at SAP, consisted of monitoring routine activities in the autopsy room, in the histopathology laboratory and writing anatomopathological and cytological. During the internship period, the following exams were carried out: 49 necropsies, 8 biopsy exams, 12 organ exams and 6 cytologies, of which were 38 analyzes were diagnosed, of which the non-conclusive diagnosis (NC) and carcinoma of the squamous cells (SCC) had a higher occurrence. During the internship, a case followed of suspected urea poisoning in Bonsmara beef bulls in the district of Boane. The owner's main complaint was the death of bulls after starting to ingest the “Ruminant feed- Veld Finisher Pellets” concentrate. The animals showed salivation excessive muscle tremors, tetany, stiffening of the forelimbs, ataxia, prostration, violent spasms, convulsions and mortality of 14 animals. During the At necropsy, abdominal distension, rectal prolapse, and the presence of foam in the airways were observed. superior aerials. At necropsy, the thoracic cavity showed distension of the organs with presence of foam in the trachea and enlarged lungs and liquid in the sac pericardial. In the abdominal cavity, distension of the pre-stomach, stomach and intestines due to the presence of food content and excess gas. In the rumen it was visible food content characterized by green forage in large quantities and feed focused. The liver presented ecchymotic hemorrhages on the capsular surface with advanced state of cadaveric alteration. In the kidneys, petechial hemorrhages were observed in the cortical region. For complementary exams to the diagnosis, fragments of the lung, liver and kidneys for histopathological examination, ruminal content and concentrated feed (a sample of the food in the feeder and another in the concentrate bag) for analysis toxicology. Histopathological analysis observed severe pulmonary edema, autolysis of the liver and congestion and degeneration of renal tubular cells. The ruminal content had a pH of 10.5. The toxicological examination detected discrepant levels of urea among the samples tested. In the sample collected from the source, levels of urea were detected. 0.5% while in the sample collected from the feeders 12.4% of urea. Based on clinical signs and complementary exams, a diagnosis of urea poisoning was made(TRADUÇÃO NOSSA)