Programa de Pós-graduação em Ciências Veterinárias, Universidade Federal de Mato Grosso do Sul - UFMS, Campo Grande, MS, Brasil.
Departamento de Medicina Veterinária Preventiva, Universidade Estadual de Londrina - UEL, Londrina, PR, Brasil.
Rev Bras Parasitol Vet. 2022 Jun 6;31(2):e003122. doi: 10.1590/S1984-29612022032. eCollection 2022.
Parasitic otitis in cattle, caused by mites, has been reported from several continents. The present study aimed to determine the distribution, prevalence, intensity, mean intensity, and range of the agent in cattle in the state of Mato Grosso do Sul, Brazil. The samples were designed at random, with an acceptable margin of error of 3% and a confidence interval of 99%. A total of 449 animals were sampled immediately after slaughter from 34 different municipalities in the state using the technique of flushing both ear canals. Only Raillietia auris (Leidy, 1872) were found, with a prevalence of 98.6%, mean intensity of 53.78 mites/animal, and a range of 1-323. Impressively, the prevalence found was identical to another survey carried out 39 years ago in the same region. Details about the parasite intensity in different age categories of the animals are presented. The study demonstrates that the prevalence and intensity of infestation by Raillietia auris are high, and in older cattle are higher than young ones.
牛的寄生性耳炎由螨引起，已在各大洲均有报道。本研究旨在确定巴西南马托格罗索州牛中该病原体的分布、流行率、强度、平均强度和范围。样本采用随机设计，误差幅度可接受为 3%，置信区间为 99%。从该州 34 个不同的市中，对 449 头屠宰后的动物立即使用冲洗两个耳道的技术进行采样。仅发现了耳痒螨（Raillietia auris），其流行率为 98.6%，平均每头动物感染 53.78 只螨虫，范围为 1-323 只。令人印象深刻的是，所发现的流行率与 39 年前在同一地区进行的另一项调查相同。本文介绍了不同年龄段动物中寄生虫强度的详细信息。研究表明，耳痒螨的感染率和强度很高，在老牛中的感染率高于小牛。
