美国佛罗里达州一只圈养黑斑羚(Aepyceros melampus)感染大片形虫

IF 1.4 Q3 PARASITOLOGY
Braxton Sizemore , An-Chi Cheng , Heather D.S. Walden , Kuttichantran Subramaniam , Samantha M. Wisely , Juan M. Campos Krauer
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引用次数: 0

摘要

寄生虫病与多种临床症状相关,兽医专业人员必须熟悉各种宿主感染的表现。随着人类活动引入新的和外来宿主物种,扩大我们对新物种病原体效应的理解成为有效监测,诊断和治疗的组成部分。这篇文章提出了美国肝吸虫的已知宿主范围的扩大,大片形吸虫,与感染在马里恩县,佛罗里达州,美国养殖黑斑羚羊。肉眼和组织病理学观察到的病变与先前报道的终端宿主感染一致,特别是横过腹膜和腹部脏器的黑色条纹,肝脏内脏表面的一个突出的假性囊肿,以及与该假性囊肿组织相关的肝纤维化和胆道增生。虽然从现场尸检中没有获得全部或部分的吸虫,但通过cPCR扩增和ITS2区域的Sanger测序证实了冷冻肝脏样本中存在大片形虫DNA。这种诊断方法是在确定粪便中没有吸虫卵后选择的,这是终端和异常宿主感染的特征。虽然黑斑羚可能在确定种群规模的流行病学和吸虫感染的生态动态方面发挥的作用不大,但鉴于它们的死角宿主地位,本报告为希望保护外来牛科动物的健康和福利的管理人员和兽医专业人员提供了重要的参考,这些外来牛科动物与大片形虫的最终宿主美洲本土牛科动物接触。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fascioloides magna infection in a captive impala (Aepyceros melampus) in Florida, USA
Parasitic diseases are associated with diverse clinical signs, and veterinary professionals must be familiar with the presentations of infections in a variety of hosts. As human activity introduces new and exotic host species, expanding our understanding of pathogen effects in new species becomes integral to effective surveillance, diagnosis, and treatment. This article presents the expansion of the known host range of the American liver fluke, Fascioloides magna, with the infection of a farmed impala (Aepyceros melampus) in Marion County, Florida, USA. The gross and histopathological lesions observed are consistent with previous reports of dead-end host infections, particularly black striping across the peritoneum and abdominal viscera, a prominent pseudocyst on the visceral face of the liver, and hepatic fibrosis and biliary hyperplasia associated with tissue taken from that pseudocyst. While no whole or partial fluke was obtained from a field necropsy of the impala, amplification via cPCR and Sanger sequencing of the ITS2 region confirmed the presence of Fascioloides magna DNA in a frozen liver sample. This diagnostic approach was selected following the determination of an absence of fluke eggs in feces, as is characteristic of dead-end and aberrant host infections. While impala likely play little role in determining population-scale epidemiological and ecological dynamics of fluke infections, given their dead-end host status, this report serves as an important reference for managers and veterinary professionals hoping to preserve the health and welfare of exotic bovids that interface with native American cervids, the definitive hosts of Fascioloides magna.
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来源期刊
CiteScore
2.90
自引率
7.10%
发文量
126
审稿时长
97 days
期刊介绍: Veterinary Parasitology: Regional Studies and Reports focuses on aspects of veterinary parasitology that are of regional concern, which is especially important in this era of climate change and the rapid and often unconstrained travel of people and animals. Relative to regions, this journal will accept papers of the highest quality dealing with all aspects of disease prevention, pathology, treatment, epidemiology, and control of parasites within the field of veterinary medicine. Also, case reports will be considered as they add to information related to local disease and its control; such papers must be concise and represent appropriate medical intervention. Papers on veterinary parasitology from wildlife species are acceptable, but only if they relate to the practice of veterinary medicine. Studies on vector-borne bacterial and viral agents are suitable, but only if the paper deals with vector transmission of these organisms to domesticated animals. Studies dealing with parasite control by means of natural products, both in vivo and in vitro, are more suited for one of the many journals that now specialize in papers of this type. However, due to the regional nature of much of this research, submissions may be considered based upon a case being made by the author(s) to the Editor. Circumstances relating to animal experimentation must meet the International Guiding Principles for Biomedical Research Involving Animals as issued by the Council for International Organizations of Medical Sciences (obtainable from: Executive Secretary C.I.O.M.S., c/o W.H.O., Via Appia, CH-1211 Geneva 27, Switzerland).
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