Avian Reoviruses in Poultry Farms from Brazil.

IF 1.3 4区 农林科学 Q2 VETERINARY SCIENCES
Vagner R Lunge, Silvia De Carli, André S K Fonseca, Nilo Ikuta
{"title":"Avian Reoviruses in Poultry Farms from Brazil.","authors":"Vagner R Lunge,&nbsp;Silvia De Carli,&nbsp;André S K Fonseca,&nbsp;Nilo Ikuta","doi":"10.1637/aviandiseases-D-22-99998","DOIUrl":null,"url":null,"abstract":"<p><p>Avian reovirus (ARV) is highly disseminated in commercial Brazilian poultry farms, causing arthritis/tenosynovitis, runting-stunting syndrome, and malabsorption syndrome in different meat- and egg-type birds (breeders, broilers, grillers, and layers). In Brazil, ARV infection was first described in broilers in the 1970s but was not considered an important poultry health problem for decades. A more concerning outcome of field infections has been observed in recent years, including condemnations at slaughterhouses because of the unsightly appearance of chicken body parts, mainly the legs. Analyses of the performance of poultry flocks have further evidenced economic losses to farms. Genetic and antigenic characterization of ARV field strains from Brazil demonstrated a high diversity of lineages circulating in the entire country, including four of the five main phylogenetic groups previously described (I, II, III, and V). It is still unclear if all of them are associated with different diseases affecting flocks' performance in Brazilian poultry. ARV infections have been controlled in Brazilian poultry farms by immunization of breeders and young chicks with classical commercial live vaccine strains (S1133, 1733, 2408, and 2177) used elsewhere in the Western Hemisphere. However, genetic and antigenic variations of the field isolates have prevented adequate protection against associated diseases, so killed autogenous vaccines are being produced from isolates obtained on specific farms. In conclusion, ARV field variants are continuously challenging poultry farming in Brazil. Epidemiological surveillance combined with molecular biological analyses from the field samples, as well as the development of vaccine strains directed toward the ARV circulating variants, are necessary to control this economically important poultry pathogen.</p>","PeriodicalId":8667,"journal":{"name":"Avian Diseases","volume":null,"pages":null},"PeriodicalIF":1.3000,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Avian Diseases","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1637/aviandiseases-D-22-99998","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"VETERINARY SCIENCES","Score":null,"Total":0}
引用次数: 0

Abstract

Avian reovirus (ARV) is highly disseminated in commercial Brazilian poultry farms, causing arthritis/tenosynovitis, runting-stunting syndrome, and malabsorption syndrome in different meat- and egg-type birds (breeders, broilers, grillers, and layers). In Brazil, ARV infection was first described in broilers in the 1970s but was not considered an important poultry health problem for decades. A more concerning outcome of field infections has been observed in recent years, including condemnations at slaughterhouses because of the unsightly appearance of chicken body parts, mainly the legs. Analyses of the performance of poultry flocks have further evidenced economic losses to farms. Genetic and antigenic characterization of ARV field strains from Brazil demonstrated a high diversity of lineages circulating in the entire country, including four of the five main phylogenetic groups previously described (I, II, III, and V). It is still unclear if all of them are associated with different diseases affecting flocks' performance in Brazilian poultry. ARV infections have been controlled in Brazilian poultry farms by immunization of breeders and young chicks with classical commercial live vaccine strains (S1133, 1733, 2408, and 2177) used elsewhere in the Western Hemisphere. However, genetic and antigenic variations of the field isolates have prevented adequate protection against associated diseases, so killed autogenous vaccines are being produced from isolates obtained on specific farms. In conclusion, ARV field variants are continuously challenging poultry farming in Brazil. Epidemiological surveillance combined with molecular biological analyses from the field samples, as well as the development of vaccine strains directed toward the ARV circulating variants, are necessary to control this economically important poultry pathogen.

巴西家禽养殖场的禽呼肠孤病毒。
禽呼肠病毒(ARV)在巴西商业家禽养殖场高度传播,在不同肉禽和蛋禽(种鸡、肉鸡、烤鸡和蛋鸡)中引起关节炎/腱子炎、发育迟缓综合征和吸收不良综合征。在巴西,20世纪70年代首次在肉鸡中发现了抗逆转录病毒感染,但几十年来并未将其视为一个重要的家禽健康问题。近年来观察到实地感染的一个更令人担忧的结果,包括屠宰场因鸡的身体部位,主要是腿的外观不美观而遭到谴责。对家禽生产性能的分析进一步证明了给养殖场造成的经济损失。来自巴西的ARV田间菌株的遗传和抗原性特征表明,在整个国家传播的谱系具有高度的多样性,包括先前描述的5个主要系统发育群中的4个(I、II、III和V)。目前尚不清楚这些谱系是否都与影响巴西家禽生产性能的不同疾病有关。在巴西的家禽养殖场,通过对育种者和雏鸡接种西半球其他地方使用的经典商业活疫苗株(S1133、1733、2408和2177),ARV感染得到了控制。然而,由于田间分离株的遗传和抗原变异,无法对相关疾病提供足够的保护,因此正在从特定农场获得的分离株生产自生灭活疫苗。总之,ARV的田间变异不断对巴西的家禽养殖业构成挑战。流行病学监测与现场样本的分子生物学分析相结合,以及开发针对ARV流行变体的疫苗株,对于控制这一具有重要经济意义的家禽病原体是必要的。
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
Avian Diseases
Avian Diseases 农林科学-兽医学
CiteScore
2.40
自引率
7.10%
发文量
80
审稿时长
3 months
期刊介绍: Avian Diseases is an international journal dedicated to publishing original basic or clinical research of the highest quality from various disciplines including microbiology, immunology, pathology and epidemiology. Papers on avian diseases relevant to etiology, pathogenesis, diagnosis, treatment, and control are accepted. Manuscripts dealing with avian species other than poultry will be considered only if the subject is relevant to poultry health.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信