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Molecular characterization of feline caliciviruses isolated from several adult cats with atypical infection showing severe flu-like symptoms on a remote island in Ehime, Japan
IF 2.5 4区 医学 Q3 VIROLOGY Pub Date : 2025-01-30 DOI: 10.1016/j.virusres.2025.199535
Yuki Nishisaka , Hikaru Fujii , Fumiko Ono , Sho Kadekaru , Hiroyuki Kogiku , Yumi Une , Shione Takeguchi , Naomi Ohta , Masumi Eto , Chiharu Takeuchi , Seigou Takeuchi , Tetsuko Miki , Akihiko Tokuda , Keiko Ookawa , Yukinobu Tohya , Keita Ishijima , Akiko Okutani , Ken Maeda , Shumpei Watanabe , Shigeru Morikawa
In November 2020, a volunteer group reported an outbreak of an infectious disease with a high fatality rate and flu-like symptoms among stray cats in Aoshima, a remote island in Ehime, Japan. Nine adult cats with severe symptoms were hospitalized. Feline calicivirus (FCV) was isolated from pharyngeal swabs of six hospitalized cats. An outbreak of virulent systemic FCV (VS-FCV) infection was initially suspected because of obvious flu-like symptoms in adult cats; however, no symptoms typically associated with VS-FCV, such as skin ulcers on the limbs, edema, or viremia, were observed. Notably, two of the hospitalized cats that showed severe disease had diarrhea and anemia, and died or had a prolonged illness. These cases reveal atypical symptoms of FCV infection that have not been previously reported. We further isolated typical strains from western Japan (Osaka, Kumamoto, and Ehime) and analyzed the viral genes along with virulent strains from Aoshima. Phylogenetic analysis showed that the Aoshima strain formed a new lineage distinct from known FCVs. The Aoshima strains isolated in the initial outbreak before December 5, 2020, and those isolated after the end of the outbreak, which are suspected pathogenic and typical non-pathogenic strains, respectively, were located in the same cluster and shown to be very similar in sequence. The virulent Aoshima strain, which causes atypical FCV infections in cats, may have been derived by acquiring several mutations from a typical strain that chronically infects cats on a remote island.
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引用次数: 0
Investigating The Circadian Rhythm Signaling Pathway in HTLV-1 Pathogenesis Using Boolean Analysis.
IF 2.5 4区 医学 Q3 VIROLOGY Pub Date : 2025-01-30 DOI: 10.1016/j.virusres.2025.199539
Abdollah Amiri, Shayan Mardi, Atefeh Bahavar, Mohsen Sheikhi, Somayeh Yasliani-Fard, Sayed-Hamidreza Mozhgani

The Human T-cell lymphotropic virus type 1 (HTLV-1), an oncogenic virus belonging to the Deltaretrovirus genus, expresses various proteins, including Tax and HBZ, which can affect many cellular pathways. In this study, we have investigated the role of the circadian rhythm signaling pathway, a key regulator of human health, in the pathogenesis of HTLV-1 using Boolean Network analysis and laboratory methods. After an extensive search of the circadian rhythm pathway, we analyzed the relationships between the genes of this pathway using the R programming language and the BoolNet package. Subsequently, we examined the impact of viral proteins on the cellular clock rhythm genes. Finally, we identified three genes, PER2, CRY1, and DEC1, as the main checkpoints from the attractors obtained. These three genes and two viral genes, Tax and HBZ, were quantitatively assessed on two groups of individuals, including ten asymptomatic carriers infected with HTLV-1 and ten healthy individuals using the qRT-PCR method. Our results showed that the expression level of PER2 and DEC1 genes was significantly higher in the asymptomatic carriers compared to the healthy control group. Also, we recorded positive correlations between PER2 and DEC1, CRY1 and DEC1, and negative correlations between HBZ and CRY1 and DEC1. In this study, we suggested that in asymptomatic carriers, the virus might try to induce a chronic infection by escaping from the immune system due to an alteration in circadian rhythm pathways. We also detected three promising genes in this pathway that could have therapeutic or diagnostic value in these individuals. However, this possibility requires further research in different periods, different groups (e.g., ATLL and HAM/TSP), and examining a more significant number of circadian rhythm genes.

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引用次数: 0
Analysis of synonymous codon usage bias of Lassa virus 拉沙病毒同义密码子使用偏差分析。
IF 2.5 4区 医学 Q3 VIROLOGY Pub Date : 2025-01-29 DOI: 10.1016/j.virusres.2025.199528
Siddiq Ur Rahman , Yikui Hu , Hassan Ur Rehman , May M. Alrashed , Kotb A. Attia , Ubaid Ullah , Huiying Liang
Lassa virus genome consists of two single-stranded, negative-sense RNA segments that lie in the genus Arenavirus. The disease associated with the Lassa virus is distributed all over the world, with approximately 3,000,000–5,000,000 infections diagnosed annually in West Africa. It shows high health risks to the human being. Previous research used the evolutionary time scale and adaptive evolution to describe the Lassa virus population pattern. However, it is still unclear how the Lassa virus takes advantage of synonymous codons. In this study, we analyzed the codon usage bias in 162 Lassa virus strains by calculating and comparing the nucleotide contents, effective number of codons (ENC), codon adaptation index (CAI), relative synonymous codon usage (RSCU), and others. The results disclosed that LASV strains are rich in A/T. The average ENC value indicated a low codon usage bias in LASVs. The ENC-plot, neutrality plot and parity rule 2 plot demonstrated that, besides mutational pressure, other factors like natural selection also contributed to codon usage bias. This study is significant because it described the pattern of codon usage in the genomes of the Lassa viruses and provided the information needed for a fundamental evolutionary study of them.
拉沙病毒基因组由沙粒病毒属中的两个单链负义RNA片段组成。与拉沙病毒相关的疾病分布在世界各地,西非每年诊断出约300万至500万例感染。它对人类的健康有很高的风险。以往的研究使用进化时间尺度和适应性进化来描述拉沙病毒的种群格局。然而,目前尚不清楚拉沙病毒是如何利用同义密码子的。本研究通过计算和比较162株拉沙病毒的核苷酸含量、有效密码子数(ENC)、密码子适应指数(CAI)、相对同义密码子使用(RSCU)等,分析了其密码子使用偏差。结果表明,LASV菌株含有丰富的A/T。平均ENC值表明lasv的密码子使用偏差较低。c -图、中性图和宇称规则2图表明,除突变压力外,自然选择等因素也对密码子使用偏差有影响。这项研究具有重要意义,因为它描述了拉沙病毒基因组中密码子的使用模式,并为它们的基础进化研究提供了所需的信息。
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引用次数: 0
Development of a water-dispersible antimicrobial lipid mixture to inhibit African swine fever virus and other enveloped viruses 水分散抗微生物脂质混合物抑制非洲猪瘟病毒和其他包膜病毒的研制。
IF 2.5 4区 医学 Q3 VIROLOGY Pub Date : 2025-01-01 DOI: 10.1016/j.virusres.2024.199516
Joshua A. Jackman , Roza Izmailyan , Rafayela Grigoryan , Tun Naw Sut , Abel Taye , Hovakim Zakaryan , Charles C. Elrod
Medium-chain antimicrobial lipids are promising antiviral agents to inhibit membrane-enveloped viruses such as African swine fever virus (ASFV) and influenza A virus (IAV) in livestock applications. However, current uses are limited to feed pathogen mitigation due to low aqueous solubility and the development of water-dispersible lipid formulations is needed for broader application usage. In this study, we report a water-dispersible antimicrobial lipid mixture of monoglycerides and lactylates that can inhibit ASFV and IAV and exhibits antiviral properties in drinking water and feed matrices. The lipid mixture reduced the viral infectivity of membrane-enveloped ASFV and IAV in aqueous solution in a dose-dependent manner but was inactive against non-enveloped encephalomyocarditis virus (EMCV). Additional ASFV experiments supported that the lipid mixture is virucidal, which was corroborated by polymerase chain reaction (PCR) experiments. Feed mitigation experiments demonstrated that the lipid mixture can also inhibit ASFV infectivity and affected the conformational properties of ASFV p72 structural protein in virus-spiked feed. Mechanistic experiments identified that the lipid mixture rapidly disrupted phospholipid membranes in a micelle-dependent manner, which aligns with the virological data while higher concentrations were needed for virucidal activity than for the onset of membrane disruption. These findings support that water-dispersible antimicrobial lipid mixtures can effectively inhibit ASFV and IAV and have practical advantages for drinking water applications compared to existing medium-chain antimicrobial lipid mitigant options that are formulated as dry powders or oils for in-feed applications.
中链抗菌脂类是抑制膜包膜病毒如非洲猪瘟病毒(ASFV)和甲型流感病毒(IAV)在畜牧业中的应用前景广阔的抗病毒药物。然而,由于水溶性低,目前的用途仅限于饲料病原体缓解,需要开发水分散脂质配方以获得更广泛的应用。在这项研究中,我们报道了一种水分散的单甘油酯和乳酸酯的抗菌脂质混合物,它可以抑制ASFV和IAV,并在饮用水和饲料基质中表现出抗病毒特性。脂质混合物在水溶液中呈剂量依赖性地降低了膜包膜ASFV和IAV的病毒感染性,但对非包膜脑心肌炎病毒(EMCV)无活性。另外的ASFV实验支持脂质混合物具有病毒毒性,聚合酶链反应(PCR)实验证实了这一点。饲料缓解实验表明,脂质混合物还可以抑制ASFV的传染性,并影响病毒添加饲料中ASFV p72结构蛋白的构象特性。机制实验发现,脂质混合物以胶束依赖的方式迅速破坏磷脂膜,这与病毒学数据一致,而杀死病毒的活性需要更高的浓度,而不是膜破坏的开始。这些发现支持水分散的抗菌脂质混合物可以有效抑制ASFV和IAV,与现有的中链抗菌脂质缓解剂相比,在饮用水应用中具有实际优势,这些中链抗菌脂质缓解剂被配制成干粉或油,用于饲料应用。
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引用次数: 0
Achieving chronic hepatitis B functional cure: Factors and potential mechanisms 实现慢性乙型肝炎功能性治愈:因素和潜在机制。
IF 2.5 4区 医学 Q3 VIROLOGY Pub Date : 2025-01-01 DOI: 10.1016/j.virusres.2024.199507
Jiarui Zheng, Zilong Wang, Linxiang Huang, Zixuan Qiu, Yandi Xie, Suzhen Jiang, Bo Feng
Chronic hepatitis B (CHB) is a significant global health issue affecting approximately 254 million individuals worldwide. Achieving the loss of hepatitis B surface antigen (HBsAg), either with or without seroconversion to hepatitis B surface antibody (HBsAb), is regarded as a functional cure and the optimal goal for addressing CHB, and can be achieved through various approaches, including induction with nucleos(t)ide analogues (NAs), induction with pegylated interferon alpha (PegIFNα), and spontaneous clearance of HBsAg. Spontaneous clearance of HBsAg is rare, while NAs can directly inhibit HBV DNA, they are unable to act on covalently closed circular DNA (cccDNA), hence inhibiting HBsAg production or clearing HBsAg is extremely challenging. On the other hand, functional cure based on PegIFNα shows good long-term durability, but over 10 % of patients still experience relapse, mostly within 48 weeks after functional cure. Factors related to CHB functional cure with antiviral therapy are complex, including host factors, viral factors, environmental factors, etc. The integration of HBV DNA into liver cells, persistence of HBV cccDNA, insufficient B cell responses and compromised T cell function pose significant barriers to HBV clearance. Therefore, this study systematically reviewed the relevant factors and potential mechanisms influencing functional cure CHB, which can provide a basis for personalized treatment, help predict treatment outcomes and assess prognosis, and provide theoretical support for the advancement of novel treatment strategies and medications.
慢性乙型肝炎(CHB)是一个重大的全球健康问题,影响全世界约2.54亿人。实现乙型肝炎表面抗原(HBsAg)的丢失,无论是否血清转化为乙型肝炎表面抗体(HBsAb),都被认为是功能性治愈和解决CHB的最佳目标,可以通过各种方法实现,包括用核苷(t)ide类似物(NAs)诱导,用聚乙二醇化干扰素α (PegIFNα)诱导,以及HBsAg的自发清除。HBsAg的自发清除是罕见的,而NAs可以直接抑制HBV DNA,它们不能作用于共价闭合环状DNA (cccDNA),因此抑制HBsAg的产生或清除HBsAg极具挑战性。另一方面,基于PegIFNα的功能治愈显示出良好的长期持久性,但超过10%的患者仍然会复发,大多数在功能治愈后48周内复发。影响慢性乙型肝炎抗病毒治疗功能治愈的因素比较复杂,包括宿主因素、病毒因素、环境因素等。HBV DNA整合入肝细胞、HBV cccDNA持续存在、B细胞反应不足和T细胞功能受损对HBV清除构成显著障碍。因此,本研究系统综述了影响CHB功能治愈的相关因素和潜在机制,可为个性化治疗提供依据,有助于预测治疗结果和评估预后,并为开发新的治疗策略和药物提供理论支持。
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引用次数: 0
Higher frequency of interstate over international transmission chains of SARS-CoV-2 virus at the Rio Grande do Sul - Brazil state borders 在巴西南部大德州边境,州际间SARS-CoV-2病毒的国际传播链频率更高。
IF 2.5 4区 医学 Q3 VIROLOGY Pub Date : 2025-01-01 DOI: 10.1016/j.virusres.2024.199500
Filipe Zimmer Dezordi , José Valter Joaquim Silva Júnior , Terimar Facin Ruoso , Angela Giovana Batista , Pedro Mesquita Fonseca , Larissa Paim Bernardo , Richard Steiner Salvato , Tatiana Schäffer Gregianini , Thaísa Regina Rocha Lopes , Eduardo Furtado Flores , Rudi Weiblen , Patrícia Chaves Brites , Mônica de Medeiros Silva , João Batista Teixeira da Rocha , Gustavo de Lima Barbosa , Lais Ceschini Machado , Alexandre Freitas da Silva , Marcelo Henrique Santos Paiva , Matheus Filgueira Bezerra , Tulio de Lima Campos , Gabriel da Luz Wallau
Brazil's COVID-19 response has faced challenges due to the continuous emergence of variants of concern (VOCs), emphasizing the need for ongoing genomic surveillance and retrospective analyses of past epidemic waves to reassess and fine tune containment protocols. Rio Grande do Sul (RS), Brazil's southernmost state, has international borders and trades with Argentina and Uruguay, along with significant domestic connections within Brazil. The identification of source and sink transmission chains at national and international scales can identify main hubs and pathways to target future interventions. In this study we investigated the RS state role in the national and international SARS-CoV-2 transmission chains, which has not been fully explored. Nasopharyngeal samples from various municipalities in RS were collected between June 2020 and July 2022. SARS-CoV-2 whole genome amplification and sequencing were performed using high-throughput Illumina sequencing. Bioinformatics analysis encompassed the development of scripts and tools to perform subsampling taking into account epidemiological information to reduce sequencing disparities bias among the regions/countries, genome assembly, and large-scale alignment and phylogenetic reconstruction. We sequenced a total of 1,480 SARS-CoV-2 genomes from RS, covering all major regions. Sequences predominantly represented Gamma (April-June 2021) and Omicron (January-July 2022) lineages. Phylogenetic analysis revealed a regional pattern for transmission dynamics, particularly with Southeast Brazil for Gamma, and a range of inter-regional connections for Delta and Omicron within the country. On the other hand, international and cross-border transmission with Argentina and Uruguay was rather limited. We evaluated the three VOCs circulation over two years in RS using a new subsampling strategy based on the number of cases in each state during the circulation of each VOC. In summary, the retrospective analysis of genomic surveillance data demonstrated that virus transmission was less intense between country borders than within the country. These findings suggest that while non-pharmacological interventions were effective to mitigate transmission across international RS land borders, they were insufficient to contain transmission at the domestic level.
由于关注变异物(VOCs)的不断出现,巴西的COVID-19应对工作面临挑战,这突显出需要持续进行基因组监测和对过去流行波进行回顾性分析,以重新评估和微调遏制方案。南大州(RS)是巴西最南端的州,与阿根廷和乌拉圭接壤,并与阿根廷和乌拉圭进行贸易,同时在巴西境内也有重要的国内联系。在国家和国际范围内确定源和汇传播链可以确定主要枢纽和途径,以确定未来干预措施的目标。在这项研究中,我们调查了RS国家在国家和国际SARS-CoV-2传播链中的作用,这一点尚未得到充分探讨。在2020年6月至2022年7月期间收集了RS各城市的鼻咽样本。采用高通量Illumina测序技术进行SARS-CoV-2全基因组扩增和测序。生物信息学分析包括基于流行病学信息的亚采样脚本和工具的开发,以减少区域/国家之间的测序差异偏差,基因组组装,大规模比对和系统发育重建。我们对来自RS的1480个SARS-CoV-2基因组进行了测序,覆盖了所有主要区域。序列主要代表Gamma(2021年4月至6月)和Omicron(2022年1月至7月)谱系。系统发育分析揭示了传播动态的区域模式,特别是Gamma在巴西东南部,Delta和Omicron在国内有一系列区域间联系。另一方面,阿根廷和乌拉圭之间的国际和跨境传播相当有限。我们根据每个州在每种挥发性有机化合物流通期间的病例数,采用一种新的子抽样策略评估了RS两年内三种挥发性有机化合物的流通。总之,对基因组监测数据的回顾性分析表明,病毒在国与国之间的传播不如在国内传播那么严重。这些发现表明,虽然非药物干预措施可以有效地减轻RS跨越国际陆地边界的传播,但它们不足以在国内层面遏制传播。
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引用次数: 0
The increasing importance of Dengue virus infection in Saudi Arabia: A review 沙特阿拉伯登革热病毒感染日益增加的重要性:综述。
IF 2.5 4区 医学 Q3 VIROLOGY Pub Date : 2025-01-01 DOI: 10.1016/j.virusres.2024.199510
Ahmad M. Alharbi
Exacerbated by the rise of global warming due to climate change, as well as ease of international travel and mass migration, the dengue virus infection remains of particular economic and global concern. Of note, the emergence of the first case of dengue viral infection occurred in Saudi Arabia in the 1990s, and since then there has been a steady rise in the number of cases. Moreover, the arrival of imported dengue virus variants poses a significant challenge to dengue fever surveillance and control efforts within the region, especially as Saudi Arabia attracts millions of religious pilgrims throughout the year. Herein, we discuss the epidemiology of dengue viral infection in Saudi Arabia, dengue fever biology and clinical manifestation. Current management strategies, amongst other factors influencing dengue fever in Saudi Arabia are also deliberated upon. Future ongoing research and consistent monitoring of both established and emerging dengue viral strains within Saudi Arabia are needed, given the lack of current comprehensive studies.
由于气候变化导致全球变暖,加上国际旅行和大规模移民的便利,登革热病毒感染愈演愈烈,仍然是经济和全球特别关注的问题。值得注意的是,20 世纪 90 年代,沙特阿拉伯出现了第一例登革热病毒感染病例,此后,病例数量持续上升。此外,输入性登革热病毒变种的到来对该地区的登革热监测和控制工作构成了重大挑战,尤其是沙特阿拉伯全年吸引了数百万宗教朝圣者。在此,我们将讨论沙特阿拉伯登革热病毒感染的流行病学、登革热生物学和临床表现。此外,还讨论了当前的管理策略以及影响沙特阿拉伯登革热的其他因素。鉴于目前缺乏全面的研究,今后需要对沙特阿拉伯境内已确定的和新出现的登革热病毒株进行持续的研究和监测。
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引用次数: 0
Whole-genome sequencing surveillance of Siberian tick-borne encephalitis virus (TBEV) identifies an additional lineage in Kyrgyzstan 对西伯利亚蜱传脑炎病毒(TBEV)的全基因组测序监测在吉尔吉斯斯坦发现了一个额外的谱系。
IF 2.5 4区 医学 Q3 VIROLOGY Pub Date : 2025-01-01 DOI: 10.1016/j.virusres.2024.199517
Jake D'Addiego , Mollie Curran-French , Jack Smith , Asankadyr T Junushov , Irena Breininger , Barry Atkinson , John Hay , Roger Hewson
Tick-borne encephalitis virus (TBEV) is the most prevalent tick-borne viral disease in Europe and Asia. There are three main subtypes of the virus: European, Siberian, and Far Eastern, each of which having distinctive ecology, clinical presentation, and geographic distribution. In recent years, other TBEV subtypes have been described, namely the Himalayan and Baikalian subtypes. Differences in virulence between TBEV subtypes have been described, with the Far Eastern subtype causing the most severe disease in humans. Considering the emergence of new TBEV foci, the genetic characterisation of the virus in endemic regions is crucial to not only better understand its epidemiology, but also to identify possible genetic determinants of virulence, as well as develop accurate diagnostics and therapeutics.
In our previous study, we identified TBEV in six localities of the Kyrgyz Republic (Kyrgyzstan), and Ala-Archa National Nature Park as a focus of TBEV transmission. Whilst we were able to retrieve the first partial TBEV sequence from Kyrgyzstan from Ixodes persulcatus ticks, we were unable to retrieve a complete genome sequence at that time.
In this study, we have utilised a sequence-independent single-primer amplification (SISPA) protocol and retrieved the complete genome sequence of our previous 2009 TBEV tick sample (strain KY09) producing the third complete TBEV genome from Kyrgyzstan, and the first genome from the region clustering within the Vasilchenko lineage, suggesting a wider distribution for the lineage than was previously thought.
We have also developed a tiling amplicon scheme for Siberian TBEV (TBEV-Sib) which produced > 90 % reference coverage at 100x sequencing depths for samples with as little as 1.13×104 RNA copies/ml. Since high viral loads are rare in TBEV clinical samples, the developed protocol adds value to TBEV-Sib endemic regions by offering a novel set of primers to further amplify the viral genome prior to sequencing.
蜱传脑炎病毒(TBEV)是欧洲和亚洲最流行的蜱传病毒性疾病。该病毒有三种主要亚型:欧洲、西伯利亚和远东,每一种都有独特的生态、临床表现和地理分布。近年来,其他的TBEV亚型也被描述,即喜马拉雅亚型和贝加尔湖亚型。已经描述了乙型脑炎病毒亚型之间的毒力差异,其中远东亚型在人类中引起最严重的疾病。考虑到新的热带病疫源地的出现,在流行地区对病毒的遗传特征进行描述不仅对于更好地了解其流行病学,而且对于确定可能的毒力遗传决定因素以及开发准确的诊断和治疗方法至关重要。在我们之前的研究中,我们确定了吉尔吉斯共和国(吉尔吉斯斯坦)的六个地区的TBEV,以及Ala-Archa国家自然公园是TBEV传播的焦点。虽然我们能够从吉尔吉斯斯坦的过sulcatus蜱中检索到第一个部分TBEV序列,但当时我们无法检索到完整的基因组序列。在这项研究中,我们利用序列独立的单引物扩增(SISPA)方案,检索了我们之前2009年的TBEV蜱虫样本(菌株KY09)的完整基因组序列,产生了来自吉尔吉斯斯坦的第三个完整的TBEV基因组,以及Vasilchenko谱系中聚集区域的第一个基因组,表明该谱系的分布比之前认为的更广泛。我们还开发了一种西伯利亚TBEV (TBEV- sib)的平铺扩增子方案,该方案在100倍测序深度下,对低至1.13×104 RNA拷贝/ml的样品产生bbb90 %的参考覆盖率。由于高病毒载量在TBEV临床样本中是罕见的,开发的方案通过提供一套新的引物在测序之前进一步扩增病毒基因组,为TBEV- sib流行区域增加了价值。
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引用次数: 0
Detection of antibodies against H5 subtype highly pathogenic avian influenza viruses in multiple raccoons in Tokachi District, Hokkaido, Japan, from 2022 to 2023 2022 - 2023年日本北海道德胜地区多只浣熊H5亚型高致病性禽流感病毒抗体检测
IF 2.5 4区 医学 Q3 VIROLOGY Pub Date : 2025-01-01 DOI: 10.1016/j.virusres.2024.199515
Minami Komami , James G. Komu , Yuki Ishiguro , Motoki Sasaki , Sachiko Matsuda , Dulamjav Jamsransuren , Vuong Nghia Bui , Yohei Watanabe , Kunitoshi Imai , Haruko Ogawa , Yohei Takeda
In recent years, infection cases of H5 subtype highly pathogenic avian influenza viruses (HPAIVs) in wild mammals have increased globally. To obtain recent epidemiological information regarding influenza A virus (IAV) infection in raccoons (Procyon lotor), the prevalence of anti-IAV antibodies in sera was analyzed among raccoons captured in Tokachi District, Hokkaido, Japan, from 2019 to 2023. Screening of serum samples using enzyme-linked immunosorbent assay and agar gel precipitation test detected anti-IAV antibodies in 5 of 114 (4.4 %) raccoons. All positive sera were from raccoons captured from 2022 to 2023. The hemagglutination inhibition test revealed that all five serum samples contained anti-H5 subtype HPAIV antibodies, and one also contained anti-H1 subtype antibodies. The neuraminidase inhibition test revealed that all five sera contained anti-N1 subtype antibodies, and one also contained anti-N8 subtype antibodies. In the virus neutralization test, these five sera showed stronger neutralization activity against the H5 subtype clade 2.3.4.4b HPAIV strain recently circulating worldwide compared to the old H5 HPAIV strain isolated in Japan in 2007. These findings suggested that raccoons could be involved in the circulation of H5 HPAIVs in nature.
近年来,全球野生哺乳动物感染H5亚型高致病性禽流感病毒(HPAIVs)的病例有所增加。为获取浣熊感染甲型流感病毒(IAV)的最新流行病学信息,分析了2019 - 2023年在日本北海道德町地区捕获的浣熊血清中抗IAV抗体的流行情况。采用酶联免疫吸附法和琼脂凝胶沉淀法对114只貉进行血清筛选,检测出5只(4.4%)的抗iav抗体。所有阳性血清均来自2022 - 2023年捕获的浣熊。血凝抑制试验显示,5份血清样本均含有抗h5亚型HPAIV抗体,1份血清样本也含有抗h1亚型抗体。神经氨酸酶抑制试验显示,5份血清均含有抗n1亚型抗体,1份血清也含有抗n8亚型抗体。在病毒中和试验中,与2007年在日本分离的H5 HPAIV旧株相比,这5种血清对最近在世界范围内流行的H5亚型分支2.3.4.4b HPAIV株表现出更强的中和活性。研究结果表明,浣熊可能参与了H5 hpaiv在自然界的循环。
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引用次数: 0
Foot-and-mouth disease in Asia 亚洲的口蹄疫。
IF 2.5 4区 医学 Q3 VIROLOGY Pub Date : 2025-01-01 DOI: 10.1016/j.virusres.2024.199514
Md. Abdur Rahman , Farah Zereen , Md. Liton Rana , Md. Golzar Hossain , Masaru Shimada , Sukumar Saha
Foot-and-mouth disease (FMD) is a highly contagious transboundary disease prevalent across the Asian continent, affecting both wild and domestic artiodactyls. The disease is caused by a virus belonging to the Aphthovirus genus of the Picornaviridae family which is categorized into seven serotypes: C, O, A, SAT1, SAT2, SAT3, and Asia1. The virus spreads through direct and indirect contact, including semen, meat, fomites, ingestion, and aerosols. FMD has a severe economic impact due to the high morbidity and mortality, especially in young animals. Prevention of the disease relies on vaccination with the prevalent serotype(s) or the slaughter and destruction of affected animals. This review discusses the prevalence of various FMD virus (FMDV) serotypes across Asia, along with the transmission modes, pathogenesis, immune response, and immune suppression by FMDV. Additionally, the review explores FMD diagnosis, prevention, and control strategies, and highlights future opportunities for research aimed at developing strain-specific viral and bacterial combined vaccines.
口蹄疫是一种在亚洲大陆流行的高度传染性跨界疾病,影响野生和家养偶蹄动物。该病由一种属于小核糖核酸病毒科Aphthovirus属的病毒引起,该病毒分为七种血清型:C、O、a、SAT1、SAT2、SAT3和Asia1。该病毒通过直接和间接接触传播,包括精液、肉类、污染物、摄入和气溶胶。由于口蹄疫的高发病率和死亡率,特别是在幼畜中,口蹄疫具有严重的经济影响。该疾病的预防依赖于接种流行血清型疫苗或屠宰和销毁受影响的动物。本文综述了亚洲地区各种口蹄疫病毒(FMDV)血清型的流行情况,以及FMDV的传播方式、发病机制、免疫反应和免疫抑制。此外,本综述还探讨了口蹄疫的诊断、预防和控制策略,并强调了旨在开发菌株特异性病毒和细菌联合疫苗的未来研究机会。
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