Genetic identification, clinical and epidemiological aspects of an equine infectious anemia outbreak in the Rio Grande do Sul State, Brazil

IF 0.8 4区农林科学 Q3 AGRONOMY

Ciencia Rural Pub Date : 2023-04-14 DOI:10.1590/0103-8478cr20220506

J. C. Jardim, P. Finger, Grazielle Vieira Cristofari, B. Anjos, C. K. Traesel, M. Brum

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引用次数: 0

Abstract

ABSTRACT: The study describes the genetic identification, clinical, and epidemiological characteristics of an outbreak of equine infectious anemia occurring in the state of Rio Grande do Sul, Brazil. Three animals kept in the periurban region of Uruguaiana city tested positive for the AGID test. The serology was performed as a requirement for transit. None of the animals showed clinical signs of infection, one animal was necropsied, and the others were stolen. In the post-mortem examination, no macroscopic changes were observed, and microscopically, discrete hemosiderosis was detected in fragments of the liver and spleen. Amplifying and sequencing a proviral DNA fragment in blood, spleen, and mesenteric lymph node samples confirmed EIAV infection. Phylogenetic analysis of the first sequenced EIAV sample from the Rio Grande do Sul State indicates a high similarity with other Brazilian samples. Results confirmed the viral presence in the state’s herds and described epidemiological and virological characteristics of EIA that contribute to the maintenance and dissemination of the virus in herds.

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巴西南大德州马传染性贫血暴发的遗传鉴定、临床和流行病学方面

摘要:本研究描述了发生在巴西南巴西大州的马传染性贫血的遗传鉴定、临床和流行病学特征。在乌拉圭市城郊地区饲养的三只动物AGID检测呈阳性。血清学是过境的必要条件。没有一只动物表现出感染的临床症状，一只动物被尸检，其他动物被偷走。尸检未见宏观改变，镜下可见肝、脾碎片中离散含铁血黄素沉着。血液、脾脏和肠系膜淋巴结样本中的前病毒DNA片段扩增和测序证实了EIAV感染。对巴西南大德州首个测序的EIAV样本的系统发育分析表明，该病毒与巴西其他样本高度相似。结果证实了病毒在该州畜群中的存在，并描述了导致病毒在畜群中维持和传播的EIA的流行病学和病毒学特征。

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来源期刊

Ciencia Rural AGRONOMY-

CiteScore

1.70

自引率

0.00%

发文量

233

审稿时长

2-4 weeks

期刊介绍： The purpose of Ciência Rural is to publish the results of original research, note and reviews which contribute significantly to knowledge in Agricultural Sciences. Preference will be given to original articles that develop news concepts or experimental approaches and are not merely repositories of scientific data. The decison of acceptance for publication lies with the Editors and is based on the recommendations of Editorial Comission, Area Committee and/ or ad hoc reviewers. The editors and reviewers are external to the institution.