Bovine abortion caused by leptospirosis

IF 0.3 Q4 VETERINARY SCIENCES Veterinary Record Case Reports Pub Date : 2024-09-18 DOI:10.1002/vrc2.997

Daniel Felipe Barrantes Murillo, Tatiane Terumi Negrão Watanabe, Marco Túlio dos Santos Costa, Luciano Nakazato, Caroline Argenta Pescador

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Abstract

A 3‐year‐old, 255 kg, mixed breed beef cow has an abortion at the last trimester of gestation, approximately 8 months. The cow was from a 1200‐hectare farm, with 1200 animals. The farm owner reported a total of 13 abortions between June and September 2022, all of them in the last trimester of gestation. Additional serological screening for Leptospira was performed in 40 cows from the herd by microscopic agglutination test with seropositive animals to serovars Icterohaemorrhagiae. Gross postmortem examination yielded icterus, pleural and peritoneal effusions. Histopathological findings were lymphoplasmacytic interstitial pneumonia and nephritis, with intraluminal spirochetes within the renal tubules, hepatic necrosis, and cholestasis. PCR on a fresh tissue pool was positive for Leptospira spp. (LipL32). Leptospirosis is a zoonotic disease, caused by the infection of the bacterial spirochetes belonging to the genus Leptospira spp. Serovars Pomona and Icterohaemorrhagiae cause acute systemic leptospirosis in cattle after incidental infections due to poor husbandry conditions and cause abortion loss in cattle in occasional outbreaks.

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钩端螺旋体病导致的牛流产

一头 3 岁、体重 255 千克的混种肉牛在妊娠最后三个月（约 8 个月）发生流产。该奶牛来自一个占地 1200 公顷、饲养 1200 头牲畜的农场。据农场主报告，在 2022 年 6 月至 9 月期间，共有 13 次流产，均发生在妊娠的最后三个月。通过显微凝集试验对该牛群中的 40 头奶牛进行了钩端螺旋体血清学筛查，结果显示 Icterohaemorrhagiae 血清阳性。尸检结果为黄疸、胸腔积液和腹腔积液。组织病理学检查结果为淋巴浆细胞性间质性肺炎和肾炎，肾小管内有腔内螺旋体，肝坏死和胆汁淤积。新鲜组织池的 PCR 检测结果显示钩端螺旋体属（LipL32）呈阳性。钩端螺旋体病是一种人畜共患疾病，由钩端螺旋体属的细菌螺旋体感染引起。由于饲养条件差，波莫纳血清型和伊克曲海默氏血清型在偶然感染后会引起牛的急性全身性钩端螺旋体病，偶尔爆发时会导致牛流产。

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来源期刊

Veterinary Record Case Reports Veterinary-Veterinary (all)

CiteScore

0.50

自引率

33.30%

发文量

266

期刊介绍： Vet Record Case Reports is an online resource that publishes articles in all fields of veterinary medicine and surgery so that veterinary professionals, researchers and others can easily find important information on both common and rare conditions. Articles may be about a single animal, herd, flock or other group of animals managed together. Common cases that present a diagnostic, ethical or management challenge, or that highlight aspects of mechanisms of injury, pharmacology or histopathology are deemed of particular educational value. All articles are peer reviewed and copy edited before publication.