Molecular epidemiology of IBDV in Italy: emergence of Northwestern European reassortants (genotype A3B1) and co-circulation with local strains.

IF 2.2 2区 农林科学 Q1 VETERINARY SCIENCES
Francesca Poletto, Gabriele Lizzi, Matteo Legnardi, Caterina Lupini, Claudia Maria Tucciarone, Giovanni Franzo, Valerio Giaccone, Sara Pedrazzoli, Giulia Quaglia, Giulia Graziosi, Marco De Nardi, Elena Catelli, Mattia Cecchinato
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引用次数: 0

Abstract

Research highlights: North-Western European reassortants (A3B1) were found in Italy for the first time.Local A3B1 clade, related to Russian and Middle Eastern strains, also persisted.Infectious pressure was seemingly stable despite this epidemiological shift.

意大利IBDV的分子流行病学:西北欧重组病毒(基因型A3B1)的出现及其与当地菌株的共循环。
传染性法氏囊病病毒(IBDV)是鸡的一种高传染性、经济相关的免疫抑制病原体。尽管属于单一血清型,但毒性ibdv在遗传和功能特征上表现出显著的异质性。传统上,毒株分为经典、变异和非常毒力的病毒,但最近发现了许多非典型IBDVs。一个主要的例子是2017年首次发现的西北欧(NW EU)基因重组(基因型A3B1)的出现,并迅速在西欧占主导地位。意大利是一个明显的例外,在那里,流行的ibdv属于与俄罗斯和中东菌株相关的一个单独的A3B1分支,但本研究也描述了NW欧盟重组菌株在该国的进入。在一项为期两年的调查(2023年3月至2025年1月)中,在肉鸡养殖场收集了256个法氏囊池并进行了分子分析:97个样品检测为田间菌株阳性(38%),43个样品检测为疫苗株阳性(17%),116个样品检测为阴性(45%)。值得注意的是,46株田间菌株为NW欧盟重组株(47%),50株属于意大利-俄罗斯-中东(ITA/RUS/ME)进化支(52%)。其余1株显示VP2特征与ITA/RUS/ME分支一致,但与VP1水平的经典减毒IBDVs聚集,可能是由于田间病毒和疫苗病毒的重配或共感染。在首次发现后,NW EU重组病毒到达所有主要的家禽生产地区,并似乎在ITA/RUS/ME进化支中普遍存在,导致感染压力增加。如此迅速的流行病学转变强调了非典型ibdv构成的威胁以及随后加强监测和控制措施的必要性。
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来源期刊
Avian Pathology
Avian Pathology 农林科学-兽医学
CiteScore
4.50
自引率
10.70%
发文量
68
审稿时长
1 months
期刊介绍: Avian Pathology is the official journal of the World Veterinary Poultry Association and, since its first publication in 1972, has been a leading international journal for poultry disease scientists. It publishes material relevant to the entire field of infectious and non-infectious diseases of poultry and other birds. Accepted manuscripts will contribute novel data of interest to an international readership and will add significantly to knowledge and understanding of diseases, old or new. Subject areas include pathology, diagnosis, detection and characterisation of pathogens, infections of possible zoonotic importance, epidemiology, innate and immune responses, vaccines, gene sequences, genetics in relation to disease and physiological and biochemical changes in response to disease. First and subsequent reports of well-recognized diseases within a country are not acceptable unless they also include substantial new information about the disease or pathogen. Manuscripts on wild or pet birds should describe disease or pathogens in a significant number of birds, recognizing/suggesting serious potential impact on that species or that the disease or pathogen is of demonstrable relevance to poultry. Manuscripts on food-borne microorganisms acquired during or after processing, and those that catalogue the occurrence or properties of microorganisms, are unlikely to be considered for publication in the absence of data linking them to avian disease.
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