Henker Luan C, Schwertz Claiton I, Lucca Neuber J, Piva Manoela M, Giacomin Patricia, Gris Anderson, Rhoden Leandro A, Norbury Luke J, da Silva Aleksandro S, da Rosa Rafael A, Mendes Ricardo E
Acta Parasitol. 2017 Mar 1;62(1):129-132. doi: 10.1515/ap-2017-0015.
An outbreak of severe parasitic pneumonia caused by Dictyocaulus viviparus was diagnosed in adult dairy cows in the municipality of Arabutã, Southern Brazil. The total morbidity in the herd was 71.9%, and the morbidity amongst adult lactating cattle was 100%. The main clinical signs observed were dyspnea, tachypnea, nasal discharge, decreased milk production, and cough. A necropsy was conducted on one animal in order to establish the diagnosis. The herd had been treated previously with levamisole; however, clinical signs persisted and became worse. After treatment with eprinomectin the severity of clinical signs decreased, and the respiratory condition subsequently disappeared. It is believed that the high morbidity presented in this outbreak is related to epidemiological factors, such as increased rainfall in 2014 and 2015, associated with low immunity of the herd. This is the first report of dictyocaulosis in adult dairy cattle in Brazil. Furthermore, it describes an outbreak presenting very high morbidity.
在巴西南部阿拉布坦市的成年奶牛群中诊断出由胎生网尾线虫引起的严重寄生性肺炎疫情。该牛群的总发病率为71.9%，成年泌乳牛的发病率为100%。观察到的主要临床症状为呼吸困难、呼吸急促、鼻液、产奶量下降和咳嗽。对一头动物进行了尸检以确诊。该牛群此前已用左旋咪唑治疗；然而，临床症状持续存在且加重。用伊维菌素治疗后，临床症状的严重程度降低，随后呼吸道疾病消失。据信，此次疫情中出现的高发病率与流行病学因素有关，如2014年和2015年降雨量增加以及牛群免疫力低下。这是巴西成年奶牛患网尾线虫病的首例报告。此外，它描述了一次发病率极高的疫情。
