We determined the prevalence of diseases and pathogens associated with mortality in beef cattle in the State of Rio Grande do Sul, Brazil, based on pathology laboratory submissions. Postmortem examinations were conducted on 1,277 beef cattle that died between 2008 and 2018. Information regarding age, time of the year, breed, and regional location were analyzed statistically. Most cattle were from the surrounding region of Porto Alegre, and 78.7% of the analyzed cases had diagnostic value. The diagnostic category with most cases was infectious and/or parasitic diseases (60%), followed by toxic and toxicoinfectious (25%). Most cases occurred in the fall. Major disease conditions identified included hemoprotozoal infection (18.2%), rabies (8.2%), and plant intoxications by Senecio spp. (8.5%) and Pteridium arachnoideum (4.6%). Hemoprotozoal infection occurred at a higher frequency in young cattle, mainly in animals up to 1 y old. Intoxication by Senecio spp. was more frequent in cattle 2–3 y old.

我们根据病理学实验室提交的材料确定了巴西南里奥格兰德州肉牛死亡率相关疾病和病原体的流行率。对 2008 年至 2018 年间死亡的 1,277 头肉牛进行了尸检。对年龄、一年中的时间、品种和区域位置等信息进行了统计分析。大多数牛来自阿雷格里港周边地区，78.7%的分析病例具有诊断价值。大多数病例的诊断类别是传染病和/或寄生虫病（60%），其次是毒性和毒性感染性疾病（25%）。大多数病例发生在秋季。确定的主要疾病状况包括血原虫感染 (18.2%)、狂犬病 (8.2%) 和千里光属植物中毒。(8.5%) 和蛛网膜蕨(4.6%)。幼牛发生血原虫感染的频率较高，主要发生在 1 岁以下的动物中。Senecio spp的中毒。在 2-3 岁的牛中更常见。