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Registros recuperados: 54
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Challenges in shrimp aquaculture due to viral diseases: distribution and biology of the five major penaeid viruses and interventions to avoid viral incidence and dispersion BJM
Seibert,Caroline H.; Pinto,Aguinaldo R..
Shrimp aquaculture has been dramatically affected by many pathogenic diseases, mainly caused by five viruses: IHHNV, YHV, TSV, WSSV, and IMNV. Here we provide a state-of-the-art overview of these shrimp viruses, with emphasis on distribution, pathology, morphology, and genomic organization, in addition to current diagnostic methods and intervention practices.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Shrimp aquaculture; Viruses; Diagnostic methods; Disease control.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000300002
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Duplex nested-PCR for detection of small ruminant lentiviruses BJM
Marinho,Rebeca C.; Martins,Gabrielle R.; Souza,Kelma C.; Sousa,Ana Lídia M.; Silva,Sabrina Tainah C.; Nobre,Juliana A.; Teixeira,Maria F.S..
Abstract Small ruminant lentiviruses (SRLV) have high genetic variability which results in different viral strains around the world. This create a challenge to design sensible primers for molecular diagnosis in different regions. This work proposes a protocol of duplex nested-PCR for the precise diagnosis of SRLV. The technique was designed and tested with the control strains CAEV Co and MVV 1514. Then, field strains were submitted to the same protocol of duplex nested-PCR. Blood samples of sheep and goats were tested with AGID and nested PCR with specific primers for pol, gag and LTR. The AGID results showed low detection capacity of positive animals, while the nested PCR demonstrated a greater capacity of virus detection. Results demonstrated that...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Standardization; Multiplex; Viruses; CAEV; MVV.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000500083
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Resistance of potato clones to necrotic recombinant strains of potato virus y (pvy) Ciência e Agrotecnologia
Ribeiro,Silvia Regina Rodrigues de Paula; Pinto,César Augusto Brasil Pereira; Costa,Suellen Bárbara Ferreira Galvino; Menezes,Mariney de; Figueira,Antonia dos Reis.
The Ry adg allele is widely used by breeders to confer extreme resistance to all strains of PVY. However, the necrotic strain has increased recombination resulting in recent considerable losses in productivity. Thus far, not all necrotic recombinant strains of PVY have been tested for their reaction to the Ry gene. The objective of this study was to identify potato clones carrying the resistant allele and to assess their reaction to the following recombinant strains: NTN (PVY NTN), Wilga (PVY N-Wi), and "curly top" (PVY E). Advanced clones from the potato breeding program at Universidade Federal de Lavras were evaluated through a specific molecular marker for the Ry adg allele. The clones carrying the resistance allele were grafted on tobacco plants...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum tuberosum; Viruses; Breeding; Genetic resistance.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000400004
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The Mathematical Biology of Human Infections Ecology and Society
Nowak, Martin A; Institute for Advanced Study; nowak@ias.edu.
Humans are constant victims of infectious diseases. Biomedical research during this century has led to important insights into the molecular details of immune defense. Yet, many questions relating to disease require a quantitative understanding of the complex systems that arise from the nonlinear interactions between populations of immune cells and infectious agents. Exploration of such questions has lead to a newly emerging field of mathematical biology describing the spread of infectious agents both within and between infected individuals. This essay will discuss simple and complex models of evolution, and the propagation of virus and prion infections. Such models provide new perspectives for our understanding of infectious disease and provide guidelines...
Tipo: Peer-Reviewed Reports Palavras-chave: CTL response; HIV; Antivirals; Epidemiology; Immune response; Infectious diseases; Mathematical biology; Models of evolution; Prions; Resistance; Treatment; Viruses.
Ano: 1999
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PRIMER REGISTRO DE ABUNDANCIA VIRAL EN BAHIA COLIUMO Y PLATAFORMA CONTINENTAL FRENTE A CHILE CENTRAL Gayana
Chiang,Oscar E; Middelboe,Mathias; Quiñones,Renato A.
The abundance of virus like particles (VLP) was determined for the first time in the water column and sediment of Coliumo Bay and on a station on the continental shelf off central Chile. The VLP decreases with depth in the water column with a surface maximum of 4.1 x 10(7) VLP mL-1 and 5.87 x 10(7) VLP mL-1 on the shelf and Coliumo Bay, respectively. In the sediments the VLP ranged between 4.28 x 10(8) VLP mL (Coliumo Bay) and 1.01 x 10(8) VLP mL (shelf). The abundance of VLP is higher at the Bay both in the water column and in the sediment.
Tipo: Journal article Palavras-chave: Viruses; Virus-like particles; Prokaryotes; Humboldt Current System.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382007000100014
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Cultura de tecidos no controle de viroses da bananeira no Brasil. Infoteca-e
SILVA NETO, S. P. da; SILVA, M. S..
Tipo: Folhetos Palavras-chave: Plant diseases; Tropical fruits; Banana; Musa acuminata; Fruta tropical; Doença de planta; Virus; Bananas; Viruses.
Ano: 2009 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/697556
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Virose da seringueira: uma nova enfermidade. Infoteca-e
JUNQUEIRA, N. T. V.; GAMA, M. I. C. S.; KITAJIMA, H. W.; LESEMANN, D. E.; LIEBEREI, R..
A primeira ocorrencia de virus atacando seringueira no Brasil foi relatada em 1983, em plantulas oriundas de sementes de seringais nativos. Em 1985, foi constatada a presenca de sintomas em varios clones de seringueira no Campo Experimental do CNPSD.
Tipo: Folhetos Palavras-chave: Brasil; Amazonas; Rubber tree; Amazon state; Espécie; Hevea; Seringueira; Virose Vegetal; Viruses.
Ano: 1987 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/665250
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Identificação do vírus do mosqueado do feijoeiro ("bean pod mottle virus") em soja no Brasil (2000). Infoteca-e
ANJOS, J. R. N. dos; CHARCHAR, M. J. A.; GOMES, A. C..
O virus do mosqueado do feijoeiro ("bean pod mottle virus" BPMV) foi identificado em plantas da soja, cultivar Itiquira, com sintomas de mosqueado, em Planaltina, Distrito Federal. Uma preparacao purificada do virus examinada em microcospio eletronico revelou a presenca de particulas isometricas em torno de 30 nm de diametro. Em testes de SDS-PAGE, foram detectadas tres proteinas com massas moleculares estimadas de 39,7, 22,9 e 21,2 kDa. A eficiencia media de transmissao do isolado do BPMV em estudo pelo crisomelideo Cerotoma arcuata Oliv. Em tres experimentos foi de 66,7%. Em experimentos de campo, o BPMV reduziu a producao de graos nas cultivares de soja Garca Branca, Garimpo, Doko, Itiquira e Pioneira em 17,1% , 17,1%, 20,4%, 20,9% e 21,4%,...
Tipo: Folhetos Palavras-chave: Planaltina; Distrito Federal; Brasil; Cerotoma Arcuata; Cerrado; Glycine Max; Soja; Vírus; Brazil; Soybeans; Viruses.
Ano: 2000 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546792
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Severidade de doenças, características físico-químicas de frutos e produtividade de plantas de maracujazeiro-azedo tratadas com indutores de resistência (2009). Infoteca-e
JUNQUEIRA, K. P.; FALEIRO, F. G.; UESUGI, C. H.; JUNQUEIRA, N. T. V.; BELLON, G.; SANTOS, E. C. dos; SOUZA, L. S.; LIMA, C. A. de.
Tipo: Folders Palavras-chave: Maracujazeiro; Indução de resistência; Gesso agrícola; Plant diseases; Bacterias; Induction of resistance; Bactéria; Doença de Planta; Fungo; Vírus; Gypsum; Fungi; Passion fruits; Viruses.
Ano: 2009 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/711883
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Comportamento em relacao as doencas e desempenho agronomico de cultivares de maracujazeiro-azedo cultivadas sem agrotoxicos no Distrito Federal. Infoteca-e
JUNQUEIRA, N. T. V.; ANJOS, J. de R. N. dos; SILVA, A. P. de O.; CHAVES, R. da C.; GOMES, A. C..
CRI6535
Tipo: Folhetos Palavras-chave: Plant diseases; Bacterioses; Anthracnosis; Agronomic characteres; Integrated control; Antracnose; Bacteriose; Características Agronômicas; Controle Integrado; Doença de Planta; Fungo; Maracujá; Passiflora Edulis; Rendimento; Verrugose; Vírus; Variedade Resistente; Disease resistance; Fungi; Passion fruits; Yields; Viruses.
Ano: 2002 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/559760
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Incidência de sintomas de virose em espécies silvestres de passiflora. Infoteca-e
SANTOS, E. C.; BRAGA, M. F.; JUNQUEIRA, N. T. V.; REZENDE, L. N.; FALEIRO, F. G.; JUNQUEIRA, K. P.; BELLON, G.; SILVA, M. R.; LIMA, C. A..
Tipo: Folders Palavras-chave: Plant diseases; Doença de Planta; Maracujá; Passiflora Edulis; Virose Vegetal; Vírus; Passion fruits; Plant viruses; Viruses.
Ano: 2006 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570147
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Depuration centre management. Course notes ArchiMer
O'Carroll, Terence; Boulter, Mark; Seaver, Mary; Masson, Daniel; O'Driscoll, Michael; Roden, Cillian.
The purpose of this course is to train and familiarise people, who are going to build, have just built or are about to modernise a purification plant, in the latest technology available to the industry and also to train people so that they can effectively run a depuration centre. ln general the course aims to : - Give participants practical experience of different systems prior to committing themselves to a particular system. - Enable participants to compare systems. - Provide a minimum training qualification to run an establishment which is essentially a facility to guarantee health and safety of products to the consumer. - Provide an overview from bacteria testing to plant lay out etc. The structure of the course is in modules, morning and...
Tipo: Text Palavras-chave: Shellfish depuration; Purification; Bacteria; Viruses.
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00140/25082/23192.pdf
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Recent advances in Australian prawns diseases and pathology ArchiMer
Owens, L; Hall, M.
Disease is always limiting in animal production and new syndromes occur in fledgling industries. This paper describes the latest findings in this area.
Tipo: Text Palavras-chave: Vibrio damsela; Macrobrachium rosenbergii; Malacostraca; Bacteria; Septicaemia; Aetiology; Viruses; Juveniles; Ovaries; Larvae; Pathology; Viral diseases.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/acte-1461.pdf
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Viral contamination and depuration of oysters under field conditions ArchiMer
Boher, S; Piclet, Guy; Beril-stien, S; Masson, Daniel; Delonce, R; Biziagos, E; Schwartzbrod, L.
Shellfish consumption is clearly associated with the transmission of enteric viruses. The channel of transmission of enteric viruses to human beings could be decreased particularly if the systems of depuration of shellfish were optimized, standardized and if their viral efficiency was controlled. The purpose of this work was to study the contamination of oysters and to assess the efficiency of several depuration processes. Our study have demonstrated that in some cases, 50% of oysters samples contain enteric viruses or H.A.V. antigen and the quantities of viruses range from 17 to 246 FF for the rotaviruses and from 124 to 200 for the enteroviruses per 100 g of tissue. According to our results, the exclusive use of a bacteriological criterium to determine...
Tipo: Text Palavras-chave: Rotavirus; Hepatitis A virus; Enterovirus; Crassostrea gigas; Bivalvia; Seafood; Bioassays; Cell culture; Viruses; Self purification; Viral diseases; Shellfish.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1615.pdf
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Status and future of molluscan pathology in North America ArchiMer
Elston, R.
Serious diseases have plagued the North American oyster industry for at least 75 years. These include Malpeque Bay disease, M.S.X. disease, perkinsiosis, nocardiosis, oyster velar virus disease and others. Some of these diseases have proven intractable since they are caused by infectious agents which have not yet been transmitted in the laboratory or which cannot yet be cultivated outside of the host animal. The increased importance of aquaculture of these species and the advent of modern molecular technologies in biology have provided both the impetus and the means to now advance the science of molluscan pathology.
Tipo: Text Palavras-chave: North America; Viruses; Viral diseases; Mollusc culture.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/acte-1475.pdf
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Development of genomic probes for detection of hepatitis A virus and enteroviruses in shellfish ArchiMer
Apaire, M; Leguyader, F; Besse, B; Billaudel, S.
The development of molecular biology techniques has modified research procedures for certain viruses, particularly hepatitis A virus (HAV) and enteroviruses. Accordingly, we designed cDNA and RNA genomic probes to detect viruses in shellfish in the environment. Better sensitivity was noted with RNA than cDNA probes: only 17/83 shellfish samples were positive with HAV and enterovirus DNA probes, where as 42/83 were positive with HAV and enterovirus RNA probes.
Tipo: Text Palavras-chave: Mollusca; Enterovirus; Hepatitis A virus; Picornaviridae; RNA probes; DNA probes; Seafood; Biology; Sensors; DNA; RNA; Viruses; Detection; Marine molluscs; Shellfish.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1613.pdf
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Inadequacy of bacterial indicators for assessing elimination rates of viruses from molluscan shellfish ArchiMer
Burkhardt, W; Watkins, W; Rippey, S.
The reported incidence of shellfish-borne illness in the United States increased dramatically during the last decade. Most of the outbreaks are attributed to diseases of viral aetiology. These human health problems result primarily from the ingestion of raw shellfish which have accumulated enteric pathogens from environmental waters or from wet storage facilities. Our studies have demonstrated that hard-shelled clams concentrate different indicator micro-organisms at variable and unpredictable rates during the year. In temperate waters, this has been observed at two abbreviated periods in mid-spring and again in late fall when accumulation rates increased dramatically. Moreover, these rates were not generally coincident for viruses and bacteria. In...
Tipo: Text Palavras-chave: Mollusca; Intestinal microflora; Phages; Seafood; Public health; Diseases; Marine molluscs; Viruses; Shellfish; Self purification; Bacteria; Indicator species.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1609.pdf
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A review of the known hosts geographical range and current diagnostic procedures for the virus diseases of cultured penaeid shrimp ArchiMer
Lightner, D; Bell, T; Redman, R.
At least six virus diseases are presently known in cultured penaeid shrimp. Each of these six penaeid virus diseases (BP = Baculovirus penaei ; MBV = Penaeus monodon -type baculovirus (including PBV of Australian penaeids); BMN = baculoviral midgut gland necrosis; HPV = hepatopancreatic parvo-like virus; IHHNV = infectious hypodermal and hematopoietic necrosis virus; and REO = reo-like virus of the hepatopancreas) may be comprised by a multitude of individual strains, some of which are highly pathogenic to some penaeids, while being of little importance to others.
Tipo: Text Palavras-chave: Baculovirus penaei; Penaeus japonicus; Penaeus monodon; Malacostraca; Marine crustaceans; Necroses; Infectious diseases; Viruses; Diseases.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/acte-1481.pdf
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Mise en evidence de particules d'allure virale associees aux noyaux des cellules mesodermiques de la zone germinative testiculaire du crabe Rhithropanopeus harrisii (Gould) (Brachyoure, Xanthide). ArchiMer
Payen, Geneviève G.; Bonami, Jean-robert.
Ultrastructural study of the testicular germinative zone in the crab R. harrisii has led to observation of virus-like particles exclusively located in the nuclei of mesodermal cells encompassing primary spermatogonia. These particles are related to the group of viruses of the herpes type.
Tipo: Text Palavras-chave: Rhithropanopeus harrisii; Viruses; Testes; Viral diseases.
Ano: 1980 URL: http://archimer.ifremer.fr/doc/1980/publication-1940.pdf
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Viral and Bacterial Epibionts in Thermally-Stressed Corals ArchiMer
Nguyen-kim, Hanh; Bouvier, Thierry; Bouvier, Corinne; Ngoc Bui, Van; Le-lan, Huong; Bettarel, Yvan.
The periodic rise in seawater temperature is one of the main environmental determinants of coral bleaching. However, the direct incidence of these episodic thermal anomalies on coral-associated microbiota and their subsequent effects on coral health are still not completely understood. In this study, we investigated the dynamics of three main microbial communities of the coral holobiont (e.g., Symbiodinium, bacteria and viruses), during an experimental thermal stress (+4 degrees C) conducted on the scleractinian Fungia repanda. The heat-treatment induced coral bleaching after 11 days and resulted in a final elevation of ca. 9, 130 and 250-fold in the abundance of mucosal viruses, bacteria, and Symbiodinium, respectively. On the contrary, the proportion of...
Tipo: Text Palavras-chave: Coral bleaching; Thermal stress; Bacteria; Viruses; Holobiont; Vietnam.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00626/73823/73642.pdf
Registros recuperados: 54
Primeira ... 123 ... Última
 

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