Eco-epidemiological Investigation of a Disease Outbreak among Pampas Foxes (Lycalopex gymnocercus) from a Protected Area in Southern Brazil.

IF 1.1 4区农林科学 Q3 VETERINARY SCIENCES

Journal of Wildlife Diseases Pub Date : 2025-05-16 DOI:10.7589/JWD-D-25-00004

José Reck, Greice Zorzato Gonchoroski, Maria Ogrzewalska, André Salvador Kazantzi Fonseca, Nilo Ikuta, Vagner Ricardo Lunge, Márcia Jardim, Tatiane C Trigo

{"title":"Eco-epidemiological Investigation of a Disease Outbreak among Pampas Foxes (Lycalopex gymnocercus) from a Protected Area in Southern Brazil.","authors":"José Reck, Greice Zorzato Gonchoroski, Maria Ogrzewalska, André Salvador Kazantzi Fonseca, Nilo Ikuta, Vagner Ricardo Lunge, Márcia Jardim, Tatiane C Trigo","doi":"10.7589/JWD-D-25-00004","DOIUrl":null,"url":null,"abstract":"<p><p>Pathogens of domestic dogs have been reported in various carnivorans worldwide. Canine distemper virus (CDV) has been responsible for lethal outbreaks and population declines. Data are scarce regarding CDV outbreaks and their impact on South American canids. An eco-epidemiological investigation of a disease outbreak in a free-living population of Pampas foxes (Lycalopex gymnocercus) in a protected area (reserve) in southern Brazil began after locals informed our team of three foxes in the reserve showing signs of incoordination and seizures. Two carcasses of recently dead foxes were recovered and tested for CDV and rabies. Additionally, samples from 22 Pampas foxes live trapped in the study area were analyzed. Samples of the two dead foxes were positive for CDV antigen, and one of them for the presence of CDV RNA. None of the animals were positive for rabies virus. Analysis of a sequence from the CDV hemagglutinin gene allowed the classification of the CDV strain within the South America 1/Europe 1 (SA1/E1) clade, with high identity with other strains previously identified in domestic dogs. Approximately 90% of live-trapped Pampas foxes were seropositive for the presence of anti-CDV antibodies, and two of them showed myoclonus, indicating an outbreak of CDV in a population of free-ranging Pampas foxes in southern Brazil, possibly due to a spillover from domestic dogs.</p>","PeriodicalId":17602,"journal":{"name":"Journal of Wildlife Diseases","volume":" ","pages":""},"PeriodicalIF":1.1000,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Wildlife Diseases","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.7589/JWD-D-25-00004","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"VETERINARY SCIENCES","Score":null,"Total":0}

引用次数: 0

Abstract

Pathogens of domestic dogs have been reported in various carnivorans worldwide. Canine distemper virus (CDV) has been responsible for lethal outbreaks and population declines. Data are scarce regarding CDV outbreaks and their impact on South American canids. An eco-epidemiological investigation of a disease outbreak in a free-living population of Pampas foxes (Lycalopex gymnocercus) in a protected area (reserve) in southern Brazil began after locals informed our team of three foxes in the reserve showing signs of incoordination and seizures. Two carcasses of recently dead foxes were recovered and tested for CDV and rabies. Additionally, samples from 22 Pampas foxes live trapped in the study area were analyzed. Samples of the two dead foxes were positive for CDV antigen, and one of them for the presence of CDV RNA. None of the animals were positive for rabies virus. Analysis of a sequence from the CDV hemagglutinin gene allowed the classification of the CDV strain within the South America 1/Europe 1 (SA1/E1) clade, with high identity with other strains previously identified in domestic dogs. Approximately 90% of live-trapped Pampas foxes were seropositive for the presence of anti-CDV antibodies, and two of them showed myoclonus, indicating an outbreak of CDV in a population of free-ranging Pampas foxes in southern Brazil, possibly due to a spillover from domestic dogs.

查看原文本刊更多论文

巴西南部某保护区潘帕斯狐（Lycalopex gymnocercus）疾病暴发的生态流行病学调查

家犬的病原体在世界各地的各种食肉动物中都有报道。犬瘟热病毒（CDV）是造成致命疫情和人口下降的原因。关于CDV暴发及其对南美犬科动物影响的数据很少。在巴西南部一个保护区（保护区）自由生活的潘帕斯狐（Lycalopex gymnocercus）种群中爆发疾病的生态流行病学调查开始后，当地人通知我们的团队，保护区有三只狐狸表现出不协调和痉挛的迹象。两具最近死亡的狐狸尸体被回收并进行了CDV和狂犬病检测。此外，对22只潘帕斯狐的样本进行了分析。两只死狐狸标本CDV抗原呈阳性，其中一只标本CDV RNA呈阳性。没有一只动物的狂犬病毒呈阳性。对CDV血凝素基因序列的分析使CDV毒株属于南美1/欧洲1 （SA1/E1）进化支，与以前在家养狗中发现的其他毒株具有高度的一致性。约90%的活捕获潘帕斯狐血清抗CDV抗体呈阳性，其中两只出现肌阵挛，表明在巴西南部自由放养的潘帕斯狐种群中爆发了CDV，可能是由于家犬的外溢。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Wildlife Diseases 农林科学-兽医学

CiteScore

2.70

自引率

0.00%

发文量

213

审稿时长

6-16 weeks

期刊介绍： The JWD publishes reports of wildlife disease investigations, research papers, brief research notes, case and epizootic reports, review articles, and book reviews. The JWD publishes the results of original research and observations dealing with all aspects of infectious, parasitic, toxic, nutritional, physiologic, developmental and neoplastic diseases, environmental contamination, and other factors impinging on the health and survival of free-living or occasionally captive populations of wild animals, including fish, amphibians, reptiles, birds, and mammals. Papers on zoonoses involving wildlife and on chemical immobilization of wild animals are also published. Manuscripts dealing with surveys and case reports may be published in the Journal provided that they contain significant new information or have significance for better understanding health and disease in wild populations. Authors are encouraged to address the wildlife management implications of their studies, where appropriate.