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1.
Cureus ; 16(1): e51910, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38333510

RESUMO

Diabetic macular edema (DME) is a significant condition linked to diabetes that can result in visual loss. In recent times, there has been a notable change in the desire for treatment, with a shift toward anti-vascular endothelial growth factor (anti-VEGF) therapy and intravitreal steroids while moving away from conventional laser therapies. This comprehensive meta-analysis explicitly compares the efficacy of two therapies for DME: anti-VEGF therapy and corticosteroid. We conducted a thorough search using PubMed and Google Scholar to identify publications that compare the effects of anti-VEGF therapy and corticosteroid implants on DME. Using Review Manager 5.0 (RevMan), we incorporated data from nine research studies, which involved a total of 877 people. The group was split into two factions: 453 patients were administered corticosteroids, while 466 patients underwent treatment with anti-VEGF therapy. Our investigation demonstrated that both corticosteroid and anti-VEGF therapy positively improved the best-corrected visual acuity (BCVA) and reduced the central macular thickness (CMT). Nevertheless, comparing the mean BCVA on the logarithm of the minimum angle of resolution (logMAR) scale revealed no statistically significant changes between the two treatments. This indicates considerable inconsistency, as evidenced by the weighted mean difference (WMD) of -0.13 (-0.41, 0.16) with a P-value of 0.39 and an I2 value of 99%. In addition, both treatments improved BCVA compared to the initial measurement. However, there was no statistically significant benefit for corticosteroid over anti-VEGF therapy, as indicated by the WMD of 0.03 (-0.07, 0.13) with a P-value of 0.55 and an I2 value of 80%. The examination of the average CMT also yielded findings that lacked statistical significance, displaying a significant amount of variation (WMD -36.37, 95% confidence interval [-127.52, 54.78], P = 0.43, I2 = 98%). Remarkably, there were no significant alterations among the anti-VEGF therapy group despite a rise in CMT from the initial measurement. The main conclusion drawn from our research is that corticosteroid demonstrates encouraging immediate enhancements in BCVA and CMT. However, anti-VEGF therapy seems to provide more significant long-term advantages. Nevertheless, it is crucial to acknowledge that the corticosteroid group had a greater susceptibility to acquiring elevated intraocular pressure (IOP) and the possibility of glaucoma.

2.
Cureus ; 16(1): e52269, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38352101

RESUMO

Acute care surgery (ACS) is a crucial medical field that specifically deals with the rapid treatment of surgical emergencies. This investigation encompasses the most recent progress, procedures, and obstacles in ACS, utilizing various sources such as scholarly articles, clinical trials, and expert statements. The development of ACS as a specialized field is a significant area of concentration, particularly emphasizing its contribution to improving patient care. An examination is conducted on the efficacy of contemporary triage systems and prompt response mechanisms, specifically in diminishing the incidence of illness and death rates associated with illnesses such as trauma, acute appendicitis, and obstructed viscera. The emphasis is placed on the surgical protocols and principles that form the basis of ACS. Examining regional and international approaches provides insight into the distinctions and commonalities in surgical techniques. An assessment is conducted to determine the effects of the transition to minimally invasive procedures on patient outcomes, recuperation periods, and healthcare expenses. The assessment also examines the logistical obstacles that ACS encounters, such as resource allocation and managing diverse teams. The examination focuses on the delicate equilibrium between prompt decision-making and care grounded in evidence. It also evaluates the possible contribution of technical breakthroughs such as telemedicine and AI to improving patient care and overcoming current obstacles. The topic of training and education for surgeons in ACS is of utmost importance and requires careful consideration. The evaluation evaluates the sufficiency of existing educational frameworks and the necessity of specific training to equip surgeons for the requirements of ACS. This analysis explores the current discourse surrounding the standardization of ACS training, considering its potential ramifications for the future of surgical procedures. Exploring ethical and legal problems in ACS also includes situations when prompt decision-making may clash with patient autonomy and informed consent. The significance of proficient communication with patients and their families during emergency surgical scenarios is underscored, emphasizing the necessity for ethical awareness and interpersonal aptitude. The investigation of ACS demonstrates its dynamic character, signifying notable advancements while recognizing enduring obstacles. Continual research, interdisciplinary collaboration, and policy adjustments are necessary to improve ACS procedures. This thorough investigation offers valuable insights for professionals and researchers, facilitating future progress in managing surgical crises.

3.
Cureus ; 15(12): e50316, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-38205460

RESUMO

In modern surgical practice, the focus extends beyond simply making and closing incisions. We aim to investigate the various complex aspects that redefine the criteria for achieving effective surgical outcomes. This narrative combines current knowledge, integrating practical experiences and academic viewpoints to comprehend the changing field of surgical care thoroughly. The tapestry explores the detailed aspects of surgical safety, examining the most recent progress in protocols, technology, and team dynamics that strive to reduce procedural risks. Examining precision in surgery, this narrative goes beyond conventional limits to explore the incorporation of advanced technologies, such as robotics and navigational systems. The complex interplay between the surgeon's proficiency and these technology aids is crucial in attaining unparalleled accuracy and favorable patient results. The focal point of this investigation is the patient's well-being, encompassing postoperative care, rehabilitation, and long-term health. Actual accounts from surgical procedures highlight the significant influence of comprehensive patient-centered methods, emphasizing the crucial need for empathy, communication, and individualized care plans in promoting healing and adaptability. As we explore this complex situation, the combination of real-life stories and academic discussions creates a clear and detailed image of a surgical environment that goes far beyond the boundaries of the operating room. "Beyond the Scalpel" seeks to engage practitioners, scholars, and stakeholders in a conversation that redefines the criteria for surgical success. It aims to establish a new benchmark that combines safety, precision, and patient well-being, ultimately shaping the future of surgical practice.

4.
Cureus ; 15(12): e50942, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-38264378

RESUMO

In general surgery, the goal of achieving favorable results following surgical procedures is consistently impeded by the intricate range of postoperative problems. This abstract summarizes a comprehensive narrative study that examines the numerous difficulties associated with postoperative complications and investigates potential remedies. With the progress of surgical practices, the intricacies of complications also increase, requiring a flexible comprehension of the diverse scenarios. This review examines the many factors contributing to postoperative complications, including patient-specific variables and advancing surgical procedures. It also explores the broader consequences of these problems on individual patients and healthcare systems. The economic results, such as extended hospitalizations and increased allocation of resources, highlight the need for specific solutions. This abstract also emphasizes the review's examination of novel methodologies, technology incorporations, and cooperative tactics as potential transformative factors. This abstract provides an overview of the ongoing efforts to change how postoperative complications are understood in general surgery. It highlights the importance of taking preventive measures and adopting a comprehensive approach to patient care.

5.
Cureus ; 15(12): e51421, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-38299132

RESUMO

This narrative review offers a thorough and inclusive examination of modern techniques for hernia repair in general surgery. This exploration spans the development of new methods, substances, and technology, providing insight into the significant changes in hernia treatment in recent years. An extensive examination of peer-reviewed literature, encompassing historical advancements, conventional approaches, and the rise of contemporary surgical tactics, was undertaken. Key focus areas include integrating mesh technology, minimally invasive procedures, biological meshes, and 3D printing improvements. The overview explains the historical development from traditional open surgeries to the introduction of laparoscopic procedures, providing detailed information on several modern approaches. The presentation includes information on the utilization of mesh, concerns particular to individual patients, and the increasing importance of robots. An extensive analysis examines complications, obstacles, and current trends, thoroughly assessing safety profiles and patient outcomes. This review aims to consolidate existing information, highlight areas lacking research, and provide future paths to enhance outcomes for patients undergoing general surgery. At the same time, the field of hernia repair experiences significant changes. The integration of classic and contemporary approaches illustrates the changing character of hernia repair, enabling a nuanced understanding among physicians and academics alike.

6.
Mater Today Proc ; 62: 5230-5234, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35311216

RESUMO

As COVID-19 suppresses the immune system and those who have recovered from COVID-19 are at risk of developing mucormycosis or black fungus so there is a need to develop new antifungal strategies by the use of medicinal plants. Medicinal plants have always been a subject of interest for drug discovery, ethno-botany, traditional and indigenous medicines. One of the successful strategies for the investigation of new bioactive compounds from medicinal plants includes the screening of plant extract, fractions followed by the purification of the constituents and screening for biological activity. In the present study, the heartwood of desert plant Acacia raddiana Willd was screened for antifungal activity by Agar-well diffusion method against Aspergillus flavus, Aspergillus niger, Candida albicans, Penicillium chrysogenum and Trichophyton rubrum. The result obtained shows that heartwood extract and their fractions serve as an effective agent against selected fungi and efficiency is dependent upon the nature of fraction and vary with respect to specific fungi. The extract and fractions shows a wide antifungal potential against C. albicans. The findings suggest that the medicinal plant under investigation might be a reasonable solution for fungal infections especially against C. albicans.

7.
Indian J Microbiol ; 54(2): 203-10, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-25320423

RESUMO

A rapid and sensitive two-step RT-PCR protocol for simultaneous detection of major apple viruses, namely Apple mosaic virus (ApMV), Apple stem pitting virus (ASPV), Apple stem grooving virus (ASGV), Apple chlorotic leaf spot virus (ACLSV) and Apple scar skin viroid (ASSVd), was developed. Five specific primer pairs were tested and confirmed for these viruses and viroid together in a single tube, giving amplicons of ~198, ~330, ~370, ~547 and ~645 bp corresponding to ASGV, ASSVd, ASPV, ApMV and ACLSV, respectively. Using a guanidinium-based extraction buffer along with a commercial kit resulted in better quality RNA as compared to kit, suited for multiplex RT-PCR. A rapid CTAB method for RNA isolation from apple tissue was developed, which produce good yield and saves time. To the best of our knowledge, this is the first report on the simultaneous detection of five pathogens (four viruses and a viroid) from apple with NADH dehydrogenase subunit 5 (nad5) as an internal control.

8.
Lung India ; 31(3): 282-4, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-25125821

RESUMO

Pulmonary alveolar proteinosis (PAP) is an orphan disease characterized by the accumulation of excess of surfactant within alveoli and bronchioles. The primary form of PAP (P-PAP; also referred to as idiopathic or autoimmune) is the most common form. It is mediated through a circulating neutralizing antibody against granulocyte-macrophage colony-stimulating factor. Secondary PAP (S-PAP) can be induced by a host of inciting agents and is far more liable to progress to terminal respiratory failure. We describe a rare case of S-PAP occurring in a renal transplant recipient due to mycophenolate and cyclosporine combination-therapy, which resolved spontaneously following withdrawal of these drugs.

9.
Indian J Exp Biol ; 52(7): 748-54, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-25059043

RESUMO

The two commercially important apple rootstocks i.e., MM106 and B9 were micropropagated using a liquid culture system. Three different strengths of 0.8% agar solidified PGR free basal MS medium were first tested to optimize the culture media for both the rootstocks. Full strength medium (MS0) supported maximum in vitro growth, multiplication, rooting and survival under field conditions as opposed to quarter and half strength media. When three different volumes of liquid MS0 were tested, highest in vitro growth, multiplication, rooting and also survival under field conditions were achieved in 20 mL liquid MS0. The cost of one litre of liquid medium was also reduced by 8 times to Rs. 6.29 as compared to solid medium. The cost of 20 mL medium was further reduced to Rs. 0.125.


Assuntos
Biotecnologia/economia , Biotecnologia/métodos , Técnicas de Cultura/métodos , Malus/crescimento & desenvolvimento , Raízes de Plantas/crescimento & desenvolvimento , Análise Custo-Benefício , Meios de Cultura , Malus/efeitos dos fármacos , Reguladores de Crescimento de Plantas/farmacologia , Raízes de Plantas/efeitos dos fármacos
10.
J Virol Methods ; 193(1): 103-7, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23707922

RESUMO

A multiplex reverse transcription-polymerase chain reaction (mRT-PCR) was developed and standardized for the simultaneous detection of four cherry viruses: Cherry virus A (CVA, Genus; Capillovirus), Cherry necrotic rusty mottle virus (CNRMV, unassigned species of the Betaflexiviridae), Little cherry virus 1 (LChV-1, Genus; Closterovirus) and Prunus necrotic ringspot virus (PNRSV, Genus; Ilarvirus) with nad5 as plant internal control. A reliable and quick method for total plant RNA extraction from pome and stone fruit trees was also developed. To minimize primer dimer formation, a single antisense primer for CVA and CNRMV was used. A mixture of random hexamer and oligo (dT) primer was used for cDNA synthesis, which was highly suited and economic for multiplexing. All four viruses were detected successfully by mRT-PCR in artificially created viral RNA mixture and field samples of sweet cherry. The identity of the viruses was confirmed by sequencing. The assay could detect above viruses in diluted cDNA (10(-4)) and RNA (10(-3), except PNRSV which was detected only till ten times lesser dilution). The developed mRT-PCR will not only be useful for the detection of viruses from single or multiple infections of sweet cherry plants but also for other stone and pome fruits. The developed method will be therefore quite helpful for virus indexing, plant quarantine and certification programs. This is the first report for the simultaneous detection of four cherry viruses by mRT-PCR.


Assuntos
Reação em Cadeia da Polimerase Multiplex/métodos , Vírus de Plantas/isolamento & purificação , Prunus/virologia , RNA Viral/isolamento & purificação , Reação em Cadeia da Polimerase Via Transcriptase Reversa/métodos , Virologia/métodos , Reação em Cadeia da Polimerase Multiplex/normas , Vírus de Plantas/genética , RNA Mensageiro/genética , RNA Mensageiro/isolamento & purificação , RNA de Plantas/genética , RNA de Plantas/isolamento & purificação , RNA Viral/genética , Reação em Cadeia da Polimerase Via Transcriptase Reversa/normas , Análise de Sequência de DNA
11.
Arch Virol ; 157(3): 531-7, 2012 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-22179900

RESUMO

Chrysanthemums worldwide suffer from a high incidence of infection with chrysanthemum virus B (CVB), a member of the genus Carlavirus, family Betaflexiviridae. Three major lineages or strains of this virus have been found in India, but none have been characterized beyond the genetic variation they display in their coat protein genes. Here, we describe the analysis of four near-complete genome sequences (from the three lineages) representing the genetic diversity of these strains. Ranging in size from 8815 to 8855 nucleotides (excluding the polyA tail), these four isolates have a genome organization very similar to that of the recently reported Japanese isolate of CVB, with which they share between 70 and 73% genome-wide sequence identity. We present further evidence that recombination may feature quite prominently in the evolution of CVB.


Assuntos
Carlavirus/isolamento & purificação , Chrysanthemum/virologia , Genoma Viral , RNA Viral/genética , Análise de Sequência de DNA , Viroses/virologia , Carlavirus/classificação , Carlavirus/genética , Análise por Conglomerados , Evolução Molecular , Ordem dos Genes , Índia , Dados de Sequência Molecular , Filogenia , Recombinação Genética , Homologia de Sequência do Ácido Nucleico , Sintenia
12.
Indian J Virol ; 23(1): 75-9, 2012 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23730008

RESUMO

Apple is the major commercial horticulture crop in Himachal Pradesh and other hill states of Jammu & Kashmir, Uttarakhand and some parts of Northeastern states of India. In order to gather data on health status and incidence of virus and virus-like pathogens in apple orchards, survey was conducted in the month of June and September, 2010 in Hatkoti, Rohru, Kuthara, Jubbal and Khadapathar areas of major apple producing Shimla district of Himachal Pradesh. A total of 250 samples were collected and analyzed by DAS-ELISA, NASH and RT-PCR. NASH results indicated that a total of 117 samples were infected with Apple chlorotic leaf spot virus (ACLSV), Apple mosaic virus (ApMV), Apple stem grooving virus (ASGV), Apple stem pitting virus (ASPV) and Apple scar skin viroid (ASSVd). Results showed that ASSVd is predominant in these areas with highest infection rate of 27.6% followed by ASPV (17.2%), ACLSV (16.8%), ApMV (15.2%) and ASGV (12%). Mixed infection of these viruses and viroid was frequently detected in apple trees in Himachal Pradesh. The trees, which were positive for viruses and viroids, showed a variety of fruit deformation and rusting symptoms besides leaf deformation, mosaic and chlorosis.

13.
Indian J Virol ; 22(1): 44-9, 2011 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23637501

RESUMO

Apple mosaic virus (ApMV), an Ilarvirus is one of the most common pathogens of apple worldwide. During field surveys in commercial plantations of Himachal Pradesh and Jammu & Kashmir, observations of bright chlorotic mosaic like symptoms on apple trees indicated probable infection by the virus, which was later detected by double antibody sandwich-enzyme linked immunosorbent assay (DAS-ELISA). An incidence of 24 and 28% (based on ELISA) was obtained as 6/25 and 15/53 samples from HP and J&K were positive, respectively. An amplification of approximately 700 and 850 bp was obtained for coat and movement protein genes (CP and MP), respectively. The CP was 223 amino acids in length and showed 87-99% identity when compared to 21 ApMV isolates. Whereas, MP (286 amino acids) showed 91-95% identity with other isolates. However, the gene sequences were quite conserved among Indian isolates and grouped together phylogenetically. CP of the Indian isolates showed maximum identity of 95% with Korean isolate (AY 125977) in apple and in other host these showed a maximum identity of 98% to Czech Republic pear isolate. MP showed maximum identity with Chinese isolate i.e., 95%. The diversity study will also help in analyzing variability among the isolates and also to formulate diagnostic and resistance strategies.

14.
Arch Virol ; 155(12): 2079-82, 2010 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-20938696

RESUMO

Cherry virus A (CVA) is a graft-transmissible member of the genus Capillovirus that infects different stone fruits. Sweet cherry (Prunus avium L; family Rosaceae) is an important deciduous temperate fruit crop in the Western Himalayan region of India. In order to determine the health status of cherry plantations and the incidence of the virus in India, cherry orchards in the states of Jammu and Kashmir (J&K) and Himachal Pradesh (H.P.) were surveyed during the months of May and September 2009. The incidence of CVA was found to be 28 and 13% from J&K and H.P., respectively, by RT-PCR. In order to characterize the virus at the molecular level, the complete genome was amplified by RT-PCR using specific primers. The amplicon of about 7.4 kb was sequenced and was found to be 7,379 bp long, with sequence specificity to CVA. The genome organization was similar to that of isolates characterized earlier, coding for two ORFs, in which ORF 2 is nested in ORF1. The complete sequence was 81 and 84% similar to that of the type isolate at the nucleotide and amino acid level, respectively, with 5' and 3' UTRs of 54 and 299 nucleotides, respectively. This is the first report of the complete nucleotide sequence of cherry virus A infecting sweet cherry in India.


Assuntos
Flexiviridae/genética , Genoma Viral , Prunus/virologia , RNA Viral/genética , Regiões 3' não Traduzidas , Regiões 5' não Traduzidas , Análise por Conglomerados , Primers do DNA/genética , Flexiviridae/isolamento & purificação , Ordem dos Genes , Incidência , Índia , Dados de Sequência Molecular , Fases de Leitura Aberta , Filogenia , Doenças das Plantas/virologia , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Análise de Sequência de DNA , Homologia de Sequência de Aminoácidos , Homologia de Sequência do Ácido Nucleico
15.
Virus Genes ; 36(2): 421-7, 2008 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-18202906

RESUMO

The complete genomic nucleotide sequence of an Indian isolate of Lily symptomless virus (LSV) was determined by sequencing 11 overlapping cDNA fragments of different sizes. The genome consisted of 8,394 nucleotides, excluding the poly (A) tail and contained six open reading frames (ORFs) coding protein for ORF1 220 kDa [1,948 amino acid (aa)], ORF2 25 kDa (228 aa), ORF3 12 kDa (106 aa), ORF4 7 kDa (64 aa), ORF5 32 kDa (291 aa) and ORF6 16 kDa (140 aa) from 5' to 3' end. Sequence was analyzed with other previously characterized full genomes of LSV. Phylogenetic analysis on the basis of RNA-dependent RNA polymerase (RdRp), Triple gene block proteins (TGB's), Coat protein (CP), and ORF6 (16 kDa protein) amino acid sequence revealed that Indian isolate is closely related to The Netherlands Isolate (AJ564638). The overall genome of the present LSV isolate shares 97-98% nucleotide sequence homology with the previously characterized isolates. The phylogenetic analysis, sequence alignment studies, and recombination detection program (RDP3) analysis provided evidence for the occurrence of recombination between the present isolate (AM422452) as major parent and The Netherlands Isolate (AJ564638) and Chinese isolate (AM263208) as minor parents in two different independent recombination events. Based on the recombination analysis, it is suggested that the 3' end of the present isolate is involved in recombination with Chinese isolate (AM263208) and gave rise to the Korean isolate. To the best of our knowledge, this is the first report of complete nucleotide sequence from India and also the first evidence of homologous recombination in LSV.


Assuntos
Carlavirus/genética , Genoma Viral , Fases de Leitura Aberta/genética , Filogenia , Recombinação Genética , Sequência de Aminoácidos , Sequência de Bases , Carlavirus/classificação , Carlavirus/isolamento & purificação , Índia , Lilium/virologia , Dados de Sequência Molecular , Alinhamento de Sequência
16.
J Biosci ; 31(1): 47-54, 2006 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-16595874

RESUMO

A viral disease was identified on geraniums (Pelargonium spp.) grown in a greenhouse at the Institute of Himalayan Bioresource Technology (IHBT), Palampur, exhibiting mild mottling and stunting. The causal virus (Cucumber mosaic virus, CMV) was identified and characterized on the basis of host range, aphid transmission, enzyme linked immunosorbent assay (ELISA), DNA-RNA hybridization and reverse transcription polymerase chain reaction (RT-PCR). A complete coat protein (CP) gene was amplified using degenerate primers and sequenced. The CP gene showed nucleotide and amino acid homology up to 97%-98% and 96%-99%, respectively with the sequences of CMV subgroup II. The CP gene also showed homologies of 75%-97% in nucleotide and 77%-96% in amino acid with the CMV Indian isolates infecting various crops. On the basis of sequence homology, it was concluded that CMV-infecting geraniums in India belong to subgroup II.


Assuntos
Proteínas do Capsídeo/química , Proteínas do Capsídeo/genética , Cucumovirus/classificação , Pelargonium/virologia , Sequência de Aminoácidos , Sequência de Bases , Cucumovirus/química , Cucumovirus/genética , Dados de Sequência Molecular , Filogenia , Doenças das Plantas/virologia
17.
Bioresour Technol ; 97(3): 364-71, 2006 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-15896955

RESUMO

A survey for distribution and abundance of plant parasitic nematodes in fields grown to Lilium in Himachal Pradesh, India at four study sites viz. Nagrota (at 810 m a.s.l.), Palampur (at 1270 m a.s.l.), Sunder Nagar (at 1400 m a.s.l.) and Chail (at 2250 m a.s.l.) was carried out. Moderate (101-500/200 ml soil) to high (501-1000/200 ml soil) populations of phytonematodes including the vectors for plant viruses (Aphelenchoides avenae, Criconemoides spp., Hoplolaimus spp., Longidorus spp., Paratylenchus spp., Pratylenchus spp., Rhabditis spp., Trichodorus spp., Tylenchoryhnchus spp., Tylenchulus spp. and Xiphinema diversicaudatum) were recorded. Mean population of nematodes was positively correlated with pH in all the study sites, negatively correlated with electrical conductivity (EC), percent organic matter (OM%), available potassium (K) and positively correlated with percent carbon (C%), available nitrogen (N) and available phosphorus (P) in all but one study site. The highest incidence of virus-vector nematodes viz. X. diversicaudatum, Longidorus spp. and Trichodorus spp. was recorded at Palampur. Only Strawberry latent ringspot nepovirus (SLRSV) was detected in Lilium cvs. Star Gazer Max and Galeili by Enzyme Linked Immunosorbent Assay (ELISA) and reverse transcription polymerase chain reaction (RT-PCR) and in X. diversicaudatum associated with the cultivars by RT-PCR. Cucumis sativus used as bait plants showed SLRSV symptoms after 15 days of nematode inoculation and further SLRSV was again detected by ELISA and RT-PCR in C. sativus plants confirming the transmission of SLRSV by X. diversicaudatum in Lilium.


Assuntos
Vetores de Doenças , Lilium/parasitologia , Nematoides/virologia , Doenças das Plantas/parasitologia , Plantas/parasitologia , Animais , Cruzamentos Genéticos , Ensaio de Imunoadsorção Enzimática , Lilium/genética , Nepovirus/isolamento & purificação , Reação em Cadeia da Polimerase Via Transcriptase Reversa
19.
Plant Dis ; 83(1): 78, 1999 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30845450

RESUMO

Asiatic hybrid lilies are popular cut flowers with a range of bright colors. Of the several viruses reported from lily (2,3), cucumber mosaic virus (CMV) reduces flower quality and yield (1). Classical symptoms of CMV were observed in recently introduced plants of Asiatic hybrid lilies in Kangra Valley, Himachal Pradesh. The symptoms were mild leaf mosaic, ring spot, transient vein yellowing, occasionally with growth deformation, and flower breaking. Leaf samples from cvs. MonteNegro, Yellow Present, Apeldoorn, Toscana, Connecticut King, and Adelina were collected randomly on the basis of symptom expression. Viral-associated double-stranded RNA (dsRNA) analysis was used to analyze tissue from symptomatic and asymptomatic plants for evidence of a possible cucumovirus. dsRNA analysis resulted in a banding profile typical of that seen with cucumoviruses. There was no evidence of dsRNA in the asymptomatic tissue. Presence of CMV in the symptomatic plants was also confirmed by enzyme-linked immunosorbent assay with antiserum from Agdia (Elkhart, IN). Virus from symptomatic tissues was purified and 30 nm polyhedral, viruslike particles were observed that were subsequently tested for CMV with counter immunoelectrophoresis with antibodies of CMV-C and CMV-D (antibodies obtained from H. A. Scott, University of Arkansas) and ATCC CMV antisera PVAS 242-A. Our isolate differs from other prevalent CMV isolates of Kangra Valley, having a narrow host range and not being readily sap transmissible. However, this isolate is normally transmitted to progeny bulblets. Lack of fallow periods, continuous cropping of other CMV-susceptible bulbous crops, and occasional sprouting of uncollected lily bulblets enhance inoculum build-up. Planting of CMV-tested lilies is recommended to avoid disease losses and to reduce viral inoculum floriculture fields. This is the first report of CMV in Asiatic hybrid lilies in India. References: (1) M. P. Benettii and L. Tomassoli. Acta Hortic. 234:465, 1988. (2) P. Brierley. Phytopathology 30:250, 1940. (3) L. Tomassoli and M. P. Benettii. Adv. Hortic. Sci. 2:117, 1988.

20.
Plant Dis ; 82(11): 1283, 1998 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-30845428

RESUMO

Rubus ellipticus is a perennial shrub occurring in natural vegetation of the temperate and subtropical Himalayas. For several years, plants of R. ellipticus in and around the Institute of Himalayan Bioresource Technology in Palampur were seen with mild mosaic and chlorotic symptoms on leaves followed by necrotic ring spots. Infected plants often recovered from the symptoms. The causal agent was mechanically transmissible to several herbaceous hosts including Cucumis sativus, Chenopodium album, C. quinoa, Cucurbita maxima, C. pepo, Melilotus alba, Trifolium repens, and Zinnia elegans. The virus incited chlorotic local lesions followed by systemic necrotic lesions or ring spots and severe stunting on C. sativus. Several aphid species (Myzus persicae, Aphis gossypii, A.fabae-solanella, Brevicoryne brassicae, and Macrosiphoniella sanbornii) were tried as viral vectors, but all failed to transmit the virus. Virus has been detected in pollen and fruit of infected plants. Ilarvirus-like particles, 27 nm in diameter, were observed in partially purified extracts of symptomatic plants of R. ellipticus and in experimentally infected C. sativus plants, but not in healthy plants. The isolate was distantly serologically related to apple mosaic virus and unrelated to tobacco streak virus. Presence of Prunus necrotic ring spot virus (PNRSV) in symptomatic plants was also confirmed by enzyme-linked immunosorbent assay with antiserum from American Type Culture Collection and Agdia, Inc. (Elkhart, IN). This is the first report of a viral disease in R. ellipticus. The presence of PNRSV in a new weed host may become an important constraint to production of susceptible agronomic crops around Palampur.

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