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Zarzyńska-Nowak A, Minicka J, Wieczorek P, Hasiów-Jaroszewska B. Development of Stable Infectious cDNA Clones of Tomato Black Ring Virus Tagged with Green Fluorescent Protein. Viruses 2024; 16:125. [PMID: 38257825 PMCID: PMC10819210 DOI: 10.3390/v16010125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/08/2024] [Accepted: 01/13/2024] [Indexed: 01/24/2024] Open
Abstract
Tomato black ring virus (TBRV) is a member of the Nepovirus genus in the Secoviridae family, which infects a wide range of important crop species worldwide. In this work, we constructed four cDNA infectious clones of the TBRV tagged with the green fluorescent protein (TBRV-GFP), which varied in (i) the length of the sequences flanking the GFP insert, (ii) the position of the GFP insert within the RNA2 polyprotein, and (iii) the addition of a self-cutting 2A protein. The presence of the GFP coding sequence in infected plants was verified by RT-PCR, while the infectivity and stability of the constructs were verified by mechanical inoculation of the host plants. The systemic spread of TBRV-GFP within plants was observed under UV light at a macroscopic level, monitoring GFP-derived fluorescence in leaves, and at a microscopic level using confocal microscopy. The obtained clones are a valuable tool for future studies of TBRV-host interactions, virus biology, and the long-term monitoring of its distribution in infected plants.
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Affiliation(s)
- Aleksandra Zarzyńska-Nowak
- Department of Virology and Bacteriology, Institute of Plant Protection—National Research Institute, Wladyslawa Wegorka 20, 60-318 Poznan, Poland; (J.M.); (B.H.-J.)
| | - Julia Minicka
- Department of Virology and Bacteriology, Institute of Plant Protection—National Research Institute, Wladyslawa Wegorka 20, 60-318 Poznan, Poland; (J.M.); (B.H.-J.)
| | - Przemysław Wieczorek
- Department of Molecular Biology and Biotechnology, Institute of Plant Protection—National Research Institute, Wladyslawa Wegorka 20, 60-318 Poznan, Poland;
| | - Beata Hasiów-Jaroszewska
- Department of Virology and Bacteriology, Institute of Plant Protection—National Research Institute, Wladyslawa Wegorka 20, 60-318 Poznan, Poland; (J.M.); (B.H.-J.)
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2
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Elbeaino T, Ben Slimen A, Belgacem I, Mnari-Hattab M, Spanò R, Digiaro M, Abdelkhalek A. Identification, Sequencing, and Molecular Analysis of RNA2 of Artichoke Italian Latent Virus Isolates from Known Hosts and a New Host Plant Species. Viruses 2023; 15:2170. [PMID: 38005847 PMCID: PMC10675341 DOI: 10.3390/v15112170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/25/2023] [Accepted: 10/26/2023] [Indexed: 11/26/2023] Open
Abstract
Despite its first description in 1977 and numerous reports of its presence in various plant species in many countries, the molecular information available in GenBank for artichoke Italian latent virus (AILV) is still limited to a single complete genome sequence (RNA1 and 2) of a grapevine isolate (AILV-V) and a partial portion of the RNA2 sequence from an isolate of unknown origin and host. Here, we report the results of molecular analyses conducted on the RNA2 of some AILV isolates, sequenced for the first time in this study, together with the first-time identification of AILV in a new host plant species, namely chard (Beta vulgaris subsp. vulgaris), associated with vein clearing and mottling symptoms on leaves. The different AILV isolates sequenced were from artichoke (AILV-C), gladiolus (AILV-G), Sonchus (AILV-S), and chard (AILV-B). At the molecular level, the sequencing results of the RNA2 segments showed that AILV-C, AILV-G, AILV-S, and AILV-B had a length of 4629 nt (excluding the 3' terminal polyA tail), which is one nt shorter than that of the AILV-V reported in GenBank. A comparison of the RNA2 coding region sequences of all the isolates showed that AILV-V was the most divergent isolate, with the lowest sequence identities of 83.2% at the nucleotide level and 84.7% at the amino acid level. Putative intra-species sequence recombination sites were predicted among the AILV isolates, mainly involving the genomes of AILV-V, AILV-C, and AILV-B. This study adds insights into the variability of AILV and the occurrence of recombination that may condition plant infection.
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Affiliation(s)
- Toufic Elbeaino
- Istituto Agronomico Mediterraneo of Bari, Via Ceglie 9, 70010 Valenzano, Italy; (A.B.S.); (I.B.); (M.D.)
| | - Amani Ben Slimen
- Istituto Agronomico Mediterraneo of Bari, Via Ceglie 9, 70010 Valenzano, Italy; (A.B.S.); (I.B.); (M.D.)
| | - Imen Belgacem
- Istituto Agronomico Mediterraneo of Bari, Via Ceglie 9, 70010 Valenzano, Italy; (A.B.S.); (I.B.); (M.D.)
| | - Monia Mnari-Hattab
- Laboratoire de Biotechnologie Appliquée à l’Agriculture, INRA Tunisie, Université de Carthage, Rue Hedi Karray, Tunis 1004, Tunisia
| | - Roberta Spanò
- Dipartimento di Scienze del Suolo, della Pianta e degli Alimenti, Università degli Studi di Bari, Via G. Amendola, 165/A, 70126 Bari, Italy;
| | - Michele Digiaro
- Istituto Agronomico Mediterraneo of Bari, Via Ceglie 9, 70010 Valenzano, Italy; (A.B.S.); (I.B.); (M.D.)
| | - Ahmed Abdelkhalek
- Plant Protection and Biomolecular Diagnosis Department, ALCRI, City of Scientific Research and Technological Applications, New Borg El Arab City 21934, Egypt;
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Genetic Diversity of Tomato Black Ring Virus Satellite RNAs and Their Impact on Virus Replication. Int J Mol Sci 2022; 23:ijms23169393. [PMID: 36012656 PMCID: PMC9409425 DOI: 10.3390/ijms23169393] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/17/2022] [Accepted: 08/19/2022] [Indexed: 11/16/2022] Open
Abstract
Viral satellite RNAs (satRNAs) are small subviral particles that are associated with the genomic RNA of a helper virus (HV). Their replication, encapsidation, and movement depend on the HV. In this paper, we performed a global analysis of the satRNAs associated with different isolates of tomato black ring virus (TBRV). We checked the presence of satRNAs in 42 samples infected with TBRV, performed recombination and genetic diversity analyses, and examined the selective pressure affecting the satRNAs population. We identified 18 satRNAs in total that differed in length and the presence of point mutations. Moreover, we observed a strong effect of selection operating upon the satRNA population. We also constructed infectious cDNA clones of satRNA and examined the viral load of different TBRV isolates in the presence and absence of satRNAs, as well as the accumulation of satRNA molecules on infected plants. Our data provide evidence that the presence of satRNAs significantly affects viral load; however, the magnitude of this effect differs among viral isolates and plant hosts. We also showed a positive correlation between the number of viral genomic RNAs (gRNAs) and satRNAs for two analysed TBRV isolates.
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Shaffer CM, Michener DC, Vlasava NB, Chotkowski H, Tzanetakis IE. Population genetics of cycas necrotic stunt virus and the development of multiplex RT-PCR diagnostics. Virus Res 2021; 309:198655. [PMID: 34906655 DOI: 10.1016/j.virusres.2021.198655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 12/07/2021] [Accepted: 12/09/2021] [Indexed: 11/26/2022]
Abstract
Cycas necrotic stunt virus (CNSV) has an extensive host range and is detected in an accelerated pace around the globe in several agricultural crops. One of the plant species affected is peony (Paeonia lactiflora Pall.). The virus is asymptomatic in most peony cultivars, but there have been reports of symptoms in others. It is thus important to study CNSV and its population structure to gain insights into its evolution and epidemiology. The outputs of this study, in addition to the in-depth analysis of the virus population structure, include the development of a multiplex RT-PCR detection protocol that can amplify all published CNSV isolate sequences; allowing for accurate, reliable detection of the virus and safeguarding its susceptible, clonally-propagated hosts.
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Affiliation(s)
- Cullen M Shaffer
- Department of Entomology and Plant Pathology, Division of Agriculture, University of Arkansas System, Fayetteville, AR 72701, United States
| | - David C Michener
- University of Michigan Matthaei Botanical Gardens & Nichols Arboretum, Ann Arbor, MI 48105, United States
| | | | | | - Ioannis E Tzanetakis
- Department of Entomology and Plant Pathology, Division of Agriculture, University of Arkansas System, Fayetteville, AR 72701, United States.
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Hily JM, Poulicard N, Kubina J, Reynard JS, Spilmont AS, Fuchs M, Lemaire O, Vigne E. Metagenomic analysis of nepoviruses: diversity, evolution and identification of a genome region in members of subgroup A that appears to be important for host range. Arch Virol 2021; 166:2789-2801. [PMID: 34370094 PMCID: PMC8421298 DOI: 10.1007/s00705-021-05111-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 04/01/2021] [Indexed: 11/26/2022]
Abstract
Data mining and metagenomic analysis of 277 open reading frame sequences of bipartite RNA viruses of the genus Nepovirus, family Secoviridae, were performed, documenting how challenging it can be to unequivocally assign a virus to a particular species, especially those in subgroups A and C, based on some of the currently adopted taxonomic demarcation criteria. This work suggests a possible need for their amendment to accommodate pangenome information. In addition, we revealed a host-dependent structure of arabis mosaic virus (ArMV) populations at a cladistic level and confirmed a phylogeographic structure of grapevine fanleaf virus (GFLV) populations. We also identified new putative recombination events in members of subgroups A, B and C. The evolutionary specificity of some capsid regions of ArMV and GFLV that were described previously and biologically validated as determinants of nematode transmission was circumscribed in silico. Furthermore, a C-terminal segment of the RNA-dependent RNA polymerase of members of subgroup A was predicted to be a putative host range determinant based on statistically supported higher π (substitutions per site) values for GFLV and ArMV isolates infecting Vitis spp. compared with non-Vitis-infecting ArMV isolates. This study illustrates how sequence information obtained via high-throughput sequencing can increase our understanding of mechanisms that modulate virus diversity and evolution and create new opportunities for advancing studies on the biology of economically important plant viruses.
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Affiliation(s)
- J M Hily
- IFV, Le Grau-Du-Roi, France.
- Université de Strasbourg, INRAE, SVQV, UMR-A 1131, F-68000, Colmar, France.
| | - N Poulicard
- PHIM, Université Montpellier, IRD, INRAE, Cirad, SupAgro, Montpellier, France
| | - J Kubina
- Université de Strasbourg, INRAE, SVQV, UMR-A 1131, F-68000, Colmar, France
| | - J S Reynard
- Institute for Plant Production Science, Agroscope, 1260, Nyon, Switzerland
| | | | - M Fuchs
- Cornell University, Geneva, NY, USA
| | - O Lemaire
- Université de Strasbourg, INRAE, SVQV, UMR-A 1131, F-68000, Colmar, France
| | - E Vigne
- Université de Strasbourg, INRAE, SVQV, UMR-A 1131, F-68000, Colmar, France.
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6
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Al-Shudifat AM, Al-Shahwan IM, Al-Saleh MA, Abdalla OA, Amer MA. Identification of Tomato black ring virus from tomato plants grown in greenhouses in Saudi Arabia. Saudi J Biol Sci 2021; 28:2360-2365. [PMID: 33911950 PMCID: PMC8071906 DOI: 10.1016/j.sjbs.2021.01.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 01/13/2021] [Accepted: 01/14/2021] [Indexed: 12/04/2022] Open
Abstract
A survey was conducted in Al-Kharj governorate, Riyadh region to identify viruses causing variety of virus-like symptoms on tomato plants. A total of 135 samples were collected from symptomatic tomato plants. Symptoms included mottling, deformation, necrosis of leaves and fruits. Eighteen viruses were tested by DAS-ELISA. Tomato black ring virus (TBRV) was the virus of concern as it was not detected in Saudi Arabia before and was detected in 52.6% of the collected samples in this study. RT-PCR was used to confirm detection of TBRV and to sequence the amplified products to determine molecular characteristics of this virus. In the host range test study that was performed using a purified isolate of TBRV, sixteen out of the twenty two tested plants showed symptoms. Brassica oleracea was not infected by this virus. Gel electrophoreses (2% agarose) yielded fragments of 978 bp of coat protein gene of TBRV. Nucleotide sequences of purified RT-PCR products for three TBRV Saudi isolates were deposited in the GenBank with the following accession numbers MT274656, MT274657, and MT274658. These isolates of TBRV indicated a close Phylogenetic relationship of (99–100%) among themselves and with five isolates from Poland (95–98%) but a distant relationship of 85% with isolates from England and Lithuania deposited in the GenBank. This is the first report for detection and molecular characterization of TBRV infecting tomato plants in Saudi Arabia.
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Affiliation(s)
- Anas Mohammed Al-Shudifat
- Plant Protection Department, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh, 11451, Saudi Arabia
| | - Ibrahim Mohammed Al-Shahwan
- Plant Protection Department, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh, 11451, Saudi Arabia
| | - Mohammad Ali Al-Saleh
- Plant Protection Department, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh, 11451, Saudi Arabia
| | - Omer Ahmed Abdalla
- Plant Protection Department, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh, 11451, Saudi Arabia
| | - Mahmoud Ahmed Amer
- Plant Protection Department, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh, 11451, Saudi Arabia
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Elbeaino T, Belghacem I, Mascia T, Gallitelli D, Digiaro M. Next generation sequencing and molecular analysis of artichoke Italian latent virus. Arch Virol 2017; 162:1805-1809. [PMID: 28247096 DOI: 10.1007/s00705-017-3290-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 01/27/2017] [Indexed: 11/26/2022]
Abstract
Next-generation sequencing (NGS) allowed the assembly of the complete RNA-1 and RNA-2 sequences of a grapevine isolate of artichoke Italian latent virus (AILV). RNA-1 and RNA-2 are 7,338 and 4,630 nucleotides in length excluding the 3' terminal poly(A) tail, and encode two putative polyproteins of 255.8 kDa (p1) and 149.6 kDa (p2), respectively. All conserved motifs and predicted cleavage sites, typical for nepovirus polyproteins, were found in p1 and p2. AILV p1 and p2 share high amino acid identity with their homologues in beet ringspot virus (p1, 81% and p2, 71%), tomato black ring virus (p1, 79% and p2, 63%), grapevine Anatolian ringspot virus (p1, 65% and p2, 63%), and grapevine chrome mosaic virus (p1, 60% and p2, 54%), and to a lesser extent with other grapevine nepoviruses of subgroup A and C. Phylogenetic and sequence analyses, all confirmed the strict relationship of AILV with members classified in subgroup B of genus Nepovirus.
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Affiliation(s)
- Toufic Elbeaino
- Istituto Agronomico Mediterraneo di Bari, Via Ceglie 9, Valenzano, 70010, Bari, Italy.
| | - Imen Belghacem
- Istituto Agronomico Mediterraneo di Bari, Via Ceglie 9, Valenzano, 70010, Bari, Italy
| | - Tiziana Mascia
- Dipartimento di Scienze del Suolo, della Pianta e degli Alimenti, Università degli Studi di Bari, Via G. Amendola, 165/A, 70126, Bari, Italy
- Unità Operativa di Supporto di Bari, Istituto del CNR per la Protezione Sostenibile della Piante, Via G. Amendola 165/A, 70126, Bari, Italy
| | - Donato Gallitelli
- Dipartimento di Scienze del Suolo, della Pianta e degli Alimenti, Università degli Studi di Bari, Via G. Amendola, 165/A, 70126, Bari, Italy
- Unità Operativa di Supporto di Bari, Istituto del CNR per la Protezione Sostenibile della Piante, Via G. Amendola 165/A, 70126, Bari, Italy
| | - Michele Digiaro
- Istituto Agronomico Mediterraneo di Bari, Via Ceglie 9, Valenzano, 70010, Bari, Italy
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8
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Zarzyńska-Nowak A, Ferriol I, Falk BW, Borodynko-Filas N, Hasiów-Jaroszewska B. Construction of Agrobacterium tumefaciens-mediated tomato black ring virus infectious cDNA clones. Virus Res 2017; 230:59-62. [PMID: 28109755 DOI: 10.1016/j.virusres.2017.01.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 01/12/2017] [Accepted: 01/14/2017] [Indexed: 11/17/2022]
Abstract
Tomato black ring virus (TBRV, genus Nepovirus) infects a wide range of economically important plants such as tomato, potato, tobacco and cucumber. Here, a successful construction of infectious full-length cDNA clones of the TBRV genomic RNAs (RNA1 and RNA2) is reported for the first time. The engineered constructs consisting of PCR-amplified DNAs were cloned into binary vector pJL89 immediately downstream of a double cauliflower mosaic virus (CaMV) 35S promoter, and upstream of the hepatitis delta virus (HDV) ribozyme and nopaline synthase terminator (NOS). The symptoms induced on plants agroinoculated with both constructs were indistinguishable from those caused by the wild-type virus. The infectivity of obtained clones was verified by reinoculation to Nicotiana tabacum cv. Xanthi, Chenopodium quinoa and Cucumis sativus. The presence of viral particles and RNA was confirmed by electron microscopy and reverse transcription polymerase chain reaction, respectively. Constructed full-length infectious cDNA clones will serve as an excellent tool to study virus-host-vector interactions.
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Affiliation(s)
| | - Inmaculada Ferriol
- Plant Pathology Department, University of California Davis, Davis, CA 95616, USA.
| | - Bryce W Falk
- Plant Pathology Department, University of California Davis, Davis, CA 95616, USA.
| | - Natasza Borodynko-Filas
- Institute of Plant Protection-National Research Institute, ul. Wł. Węgorka 20, 60-318 Poznań, Poland.
| | - Beata Hasiów-Jaroszewska
- Institute of Plant Protection-National Research Institute, ul. Wł. Węgorka 20, 60-318 Poznań, Poland.
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Fuchs M, Schmitt-Keichinger C, Sanfaçon H. A Renaissance in Nepovirus Research Provides New Insights Into Their Molecular Interface With Hosts and Vectors. Adv Virus Res 2016; 97:61-105. [PMID: 28057260 DOI: 10.1016/bs.aivir.2016.08.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Nepoviruses supplied seminal landmarks to the historical trail of plant virology. Among the first agriculturally relevant viruses recognized in the late 1920s and among the first plant viruses officially classified in the early 1970s, nepoviruses also comprise the first species for which a soil-borne ectoparasitic nematode vector was identified. Early research on nepoviruses shed light on the genome structure and expression, biological properties of the two genomic RNAs, and mode of transmission. In recent years, research on nepoviruses enjoyed an extraordinary renaissance. This resurgence provided new insights into the molecular interface between viruses and their plant hosts, and between viruses and dagger nematode vectors to advance our understanding of some of the major steps of the infectious cycle. Here we examine these recent findings, highlight ongoing work, and offer some perspectives for future research.
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Affiliation(s)
- M Fuchs
- Section of Plant Pathology and Plant-Microbe Biology, School of Integrative Plant Science, Cornell University, New York State Agricultural Experiment Station, Geneva, NY, United States.
| | - C Schmitt-Keichinger
- Institut de Biologie Moléculaire des Plantes du CNRS, Université de Strasbourg, Strasbourg, France
| | - H Sanfaçon
- Summerland Research and Development Centre, Agriculture and Agri-Food Canada, Summerland, BC, Canada
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10
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Lin YT, Wang YP, Wang FD, Fung CP. Community-onset Klebsiella pneumoniae pneumonia in Taiwan: clinical features of the disease and associated microbiological characteristics of isolates from pneumonia and nasopharynx. Front Microbiol 2015. [PMID: 25741336 PMCID: PMC5808220 DOI: 10.3389/fmicb.2018.00122] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
As virus diseases cannot be controlled by traditional plant protection methods, the risk of their spread have to be minimized on vegetatively propagated plants, such as grapevine. Metagenomic approaches used for virus diagnostics offer a unique opportunity to reveal the presence of all viral pathogens in the investigated plant, which is why their application can reduce the risk of using infected material for a new plantation. Here we used a special branch, deep sequencing of virus-derived small RNAs, of this high-throughput method for virus diagnostics, and determined viromes of vineyards in Hungary. With NGS of virus-derived small RNAs we could detect not only the viruses tested routinely, but also new ones, which had never been described in Hungary before. Virus presence did not correlate with the age of the plantation, moreover phylogenetic analysis of the identified virus isolates suggests that infections are mostly caused by the use of infected propagating material. Our results, validated by other molecular methods, raised further questions to be answered before this method can be introduced as a routine, reliable test for grapevine virus diagnostics.
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Affiliation(s)
- Yi-Tsung Lin
- Division of Infectious Diseases, Department of Medicine, Taipei Veterans General Hospital Taipei, Taiwan ; School of Medicine, National Yang-Ming University Taipei, Taiwan
| | - Yu-Ping Wang
- Division of Infectious Diseases, Department of Medicine, Taipei Veterans General Hospital Taipei, Taiwan
| | - Fu-Der Wang
- Division of Infectious Diseases, Department of Medicine, Taipei Veterans General Hospital Taipei, Taiwan ; School of Medicine, National Yang-Ming University Taipei, Taiwan
| | - Chang-Phone Fung
- Division of Infectious Diseases, Department of Medicine, Taipei Veterans General Hospital Taipei, Taiwan ; School of Medicine, National Yang-Ming University Taipei, Taiwan
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Czotter N, Molnar J, Szabó E, Demian E, Kontra L, Baksa I, Szittya G, Kocsis L, Deak T, Bisztray G, Tusnady GE, Burgyan J, Varallyay E. Community-onset Klebsiella pneumoniae pneumonia in Taiwan: clinical features of the disease and associated microbiological characteristics of isolates from pneumonia and nasopharynx. Front Microbiol 2015; 9:122. [PMID: 25741336 PMCID: PMC5808220 DOI: 10.3389/fmicb.2015.00122] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Accepted: 01/30/2015] [Indexed: 12/31/2022] Open
Abstract
Klebsiella pneumoniae is an important cause of community-onset pneumonia in Asian countries and South Africa. We investigated the clinical characteristics of K. pneumoniae causing community-onset pneumonia, and the associated microbiological features between K. pneumoniae isolates from pneumonia and those from the nasopharynx in Taiwan. This study was conducted at the Taipei Veterans General Hospital during July, 2012 to February, 2014. The clinical characteristics in patients with community-onset K. pneumoniae pneumonia were analyzed. K. pneumoniae isolates from the nasopharynx of adults attending otorhinolaryngology outpatient clinics were collected to compare their microbiological features with those from pneumonia. Capsular genotypes, antimicrobial susceptibility, and multilocus sequence type (MLST) were determined among these strains. Ninety-one patients with community-onset K. pneumoniae pneumonia were enrolled. We found a high mortality (29.7%) among these patients. Capsular types K1, K2, K5, K20, K54, and K57 accounted for ∼70% of the K. pneumoniae isolates causing pneumonia, and ∼70% of all the K. pneumoniae strains isolated from the nasopharynx of patients in outpatient clinics. The MLST profiles further demonstrated the genetic relatedness between most pneumonia isolates and those from the nasopharynx. In conclusion, our results show that community-onset pneumonia caused by K. pneumoniae was associated with high mortality and could have a reservoir in the nasopharynx. To tackle this high-mortality disease, the distribution of capsular types in the nasopharynx might have implications for future vaccine development.
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Affiliation(s)
- Nikoletta Czotter
- National Agricultural Research and Innovation Center, Agricultural Biotechnology Institute, Gödöllo, Hungary
| | - Janos Molnar
- Research Center of Natural Sciences, Institute of Enzymology, HAS, Budapest, Hungary
- Department of Biotechnology, Nanophage-therapy Center, Enviroinvest Corporation, Pécs, Hungary
| | - Emese Szabó
- National Agricultural Research and Innovation Center, Agricultural Biotechnology Institute, Gödöllo, Hungary
| | - Emese Demian
- National Agricultural Research and Innovation Center, Agricultural Biotechnology Institute, Gödöllo, Hungary
| | - Levente Kontra
- National Agricultural Research and Innovation Center, Agricultural Biotechnology Institute, Gödöllo, Hungary
| | - Ivett Baksa
- National Agricultural Research and Innovation Center, Agricultural Biotechnology Institute, Gödöllo, Hungary
| | - Gyorgy Szittya
- National Agricultural Research and Innovation Center, Agricultural Biotechnology Institute, Gödöllo, Hungary
| | - Laszlo Kocsis
- Department of Horticulture, Georgikon Faculty, University of Pannonia, Keszthely, Hungary
| | - Tamas Deak
- Department of Viticulture, Institute of Viticulture and Oenology, Szent-Istvan University, Budapest, Hungary
| | - Gyorgy Bisztray
- Department of Viticulture, Institute of Viticulture and Oenology, Szent-Istvan University, Budapest, Hungary
| | - Gabor E. Tusnady
- Research Center of Natural Sciences, Institute of Enzymology, HAS, Budapest, Hungary
| | - Jozsef Burgyan
- National Agricultural Research and Innovation Center, Agricultural Biotechnology Institute, Gödöllo, Hungary
| | - Eva Varallyay
- National Agricultural Research and Innovation Center, Agricultural Biotechnology Institute, Gödöllo, Hungary
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