Clinic for Swine, Small Ruminants and Forensic Medicine, University of Veterinary Medicine Hannover, Foundation, Bischofsholer Damm 15, 30173, Hannover, Germany.
Department of Infection Biology and Microbiomes, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Leahurst Campus, Chester High Rd, Neston, Liverpool, CH64 7TE, UK.
Acta Vet Scand. 2020 Aug 27;62(1):46. doi: 10.1186/s13028-020-00544-0.
Contagious ovine digital dermatitis (CODD) is a significant disease of the ovine foot characterised by severe lameness and progressive separation of the hoof horn capsule from the underlying tissue. Similar to bovine digital dermatitis (BDD), pathogenic members of the genus Treponema including the Treponema medium phylogroup, Treponema phagedenis phylogroup and Treponema pedis are frequently found together in CODD lesions. To date, CODD was only described in Ireland and the United Kingdom. In northern Germany, cases of an unusually severe lameness presented in a sheep flock that had been affected by footrot for several years. These cases were non-responsive to conventional footrot therapies, with some sheep exhibiting substantial lesions of the claw horn that resulted in horn detachment. Lesion swab samples were collected from both clinically affected and asymptomatic animals. In all clinically affected sheep, CODD-associated Treponema phylogroups were detected by polymerase chain reaction. This is the first report of CODD in Germany and mainland Europe, indicating a wider geographic spread than previously considered. In cases of severe lameness attributed to claw lesions in sheep that fail to respond to footrot treatment, CODD should be considered irrespective of geographic location.
传染性绵羊趾皮炎（CODD）是一种严重的绵羊足部疾病，其特征为严重跛行和蹄壳角质与下方组织逐渐分离。与牛传染性趾皮炎（BDD）类似，包括中密螺旋体菌群、吞噬密螺旋体菌群和猪密螺旋体在内的致病性密螺旋体成员经常在 CODD 病变中共同存在。迄今为止，CODD 仅在爱尔兰和英国被描述过。在德国北部，一个多年来一直受腐蹄病影响的绵羊群中出现了一种异常严重的跛行病例。这些病例对常规腐蹄病治疗没有反应，一些绵羊出现了严重的爪角病变，导致角脱落。从临床受影响和无症状动物身上采集了病变拭子样本。在所有临床受影响的绵羊中，均通过聚合酶链反应检测到与 CODD 相关的密螺旋体菌群。这是德国和欧洲大陆首次报告 CODD，表明其地理分布范围比之前认为的更广。在归因于蹄部病变导致对腐蹄病治疗无反应的严重跛行病例中，无论地理位置如何，都应考虑 CODD。
