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Potato rough dwarf virus (PRDV) was originally described in Argentina while potato virus P (PVP) was first reported from Brazil . These viruses were essentially indistinguishable in test plant reactions when inoculated onto 21 dif...
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Potato rough dwarf virus (PRDV) was originally described in Argentina while potato virus P (PVP) was first reported from Brazil . These viruses were essentially indistinguishable in test plant reactions when inoculated onto 21 different solanaceous species . Of the 10 sola-naceous species susceptible to both PRDV and PVP, the majority did not display symptoms. Only Nicotiana meg-alosiphon and N. occidentalis showed systemic symptoms consisting of leaf deformations, leaf rugosity and/or inter-veinal chlorosis. Six of the 7 potato varieties tested were susceptible to both PRDV and PVP, but visible symptoms consisting of plant stunting and the aforementioned leaf symptoms were only evident in second-generation plants of the potato cvs. Primicia and Sierra Volcan infected by PRDV .
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Intercontinental movements of northern pintail {Anas acuta) ducks wintering in Japan create a high-risk of both incursion and dispersion of avian influenza viruses (AIVs) that circulate in the ducks' breeding grounds in Siberia an...
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Intercontinental movements of northern pintail {Anas acuta) ducks wintering in Japan create a high-risk of both incursion and dispersion of avian influenza viruses (AIVs) that circulate in the ducks' breeding grounds in Siberia and Alaska. This predisposition is likely amplified by bi-directional conveyance of AIVs between Japan and China. In this study, H5N2 viruses were characterized by means of HA cleavage site sequencing and found to be low pathogenic. Through entire genome analysis, as well as in ovo and in vitro pathogenicity tests, one isolate - A/northern pintail/Akita/714/06 H5N2 (Akita/714/06 H5N2) -was characterized. Comparative molecular analysis revealed that genes of this virus have 97.5-99.6% and 96.7-100% likeness at nucleotide and at amino acid level, respectively, with genes of different subtypes of viruses isolated from China, Korea, Russia, and Italy. Phylogenetically, Akita/714/06 (H5N2) clustered with viruses isolated from Eurasian countries. Partial affinity to a recent Korean porcine strain is noticeable. Related evolutionary, ecological, and phenotypic aspects were discussed, thereby signifying the importance of the described pathogen-host-ecosystem interfaces.
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Objective: To validate the detection of human epidermal growth factor receptor-2 (HER2) status using the Leica HER2 fluorescent in situ hybridization (FISH) system and subsequent semi-quantitative analysis with the Menarini Benelu...
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Objective: To validate the detection of human epidermal growth factor receptor-2 (HER2) status using the Leica HER2 fluorescent in situ hybridization (FISH) system and subsequent semi-quantitative analysis with the Menarini Benelux D-Sight digital imaging platform, in order to predict HER2-directed therapy in patients with invasive breast cancer.
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An outbreak of coronavirus disease 2019 (COVID-19) caused by a novel coronavirus (severe acute respiratory syndrome coronavirus 2 [SARS-CoV-2]) began in Wuhan, Hubei, China, in December 2019 and spread rapidly worldwide. The respo...
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An outbreak of coronavirus disease 2019 (COVID-19) caused by a novel coronavirus (severe acute respiratory syndrome coronavirus 2 [SARS-CoV-2]) began in Wuhan, Hubei, China, in December 2019 and spread rapidly worldwide. The response by the Alberta Precision Laboratories, Public Health Laboratory (ProvLab), AB, Canada, included the development and implementation of nucleic acid detection-based assays and dynamic changes in testing protocols for the identification of cases as the epidemic curve increased exponentially. ABSTRACT An outbreak of coronavirus disease 2019 (COVID-19) caused by a novel coronavirus (severe acute respiratory syndrome coronavirus 2 [SARS-CoV-2]) began in Wuhan, Hubei, China, in December 2019 and spread rapidly worldwide. The response by the Alberta Precision Laboratories, Public Health Laboratory (ProvLab), AB, Canada, included the development and implementation of nucleic acid detection-based assays and dynamic changes in testing protocols for the identification of cases as the epidemic curve increased exponentially. This rapid response was essential to slow down and contain transmission and provide valuable time to the local health authorities to prepare appropriate response strategies. As of May 24, 2020, 236,077 specimens were tested, with 6,475 (2.74%) positives detected in the province of Alberta, Canada. Several commercial assays are now available; however, the response from commercial vendors to develop and market validated tests is a time-consuming process. In addition, the massive global demand made it difficult to secure a reliable commercial supply of testing kits and reagents. A public health laboratory serves a unique and important role in the delivery of health care. One of its functions is to anticipate and prepare for novel emerging pathogens with a plan for pandemic preparedness. Here, we outline the response that involved the development and deployment of testing methodologies that evolved as SARS-CoV-2 spread worldwide, the challenges encountered, and mitigation strategies. We also provide insight into the organizational structure of how a public health response is coordinated in Alberta, Canada, and its benefits.
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The 15 articles included in this special issue of Virus Research were based on material presented at the Xth International Plant Virus Epidemiology Symposium. This was held on October 14-18, 2007 at the International Crops Researc...
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The 15 articles included in this special issue of Virus Research were based on material presented at the Xth International Plant Virus Epidemiology Symposium. This was held on October 14-18, 2007 at the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, Andhra Pradesh, India. A total of 58 oral presentations and 118 posters were offered.The Hyderabad meeting was the tenth in the series of International Symposia held every 2-3 years since 1981 under the auspices of the International Plant Virus Epidemiology Committee (IPVEC) of the International Society for Plant Pathology. There were 217 participants from 27 different countries from five continents. The principal symposium organiser was Lava Kumar of ICRISAT with help from Farid Waliyah also from ICRISAT.
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摘要 :
The 15 articles included in this special issue of Virus Research were based on material presented at the Xth International Plant Virus Epidemiology Symposium. This was held on October 14-18, 2007 at the International Crops Researc...
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The 15 articles included in this special issue of Virus Research were based on material presented at the Xth International Plant Virus Epidemiology Symposium. This was held on October 14-18, 2007 at the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, Andhra Pradesh, India. A total of 58 oral presentations and 118 posters were offered.The Hyderabad meeting was the tenth in the series of International Symposia held every 2-3 years since 1981 under the auspices of the International Plant Virus Epidemiology Committee (IPVEC) of the International Society for Plant Pathology. There were 217 participants from 27 different countries from five continents. The principal symposium organiser was Lava Kumar of ICRISAT with help from Farid Waliyah also from ICRISAT.
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