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Registros recuperados: 115
Primeira ... 123456 ... Última
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Desarrollo de una técnica de inmunodifusión para la detección del virus Sacbrood en abejas InVet
Albo,GN.; Kuzmanich,R.; Reynaldi,FJ.; Picotto,LD.; Sguazza,GH..
La apicultura es una de las actividades agrícolas más importantes de la República Argentina. En los últimos años se ha observado, a nivel mundial, una marcada disminución en el número de abejas. La mortalidad de las abejas, puede atribuirse a la interacción de factores ambientales, al manejo de las colonias o a la acción de diversos microorganismos, entre ellos los virus. Teniendo en cuenta que en la Argentina en este momento solamente se cuenta con técnicas de diagnostico moleculares para la detección de virus, el objetivo de este trabajo fue desarrollar un test de inmunodifusión que permita la detección del Virus de la Cría Ensacada de forma más sencilla y económica. Para ello una cepa autóctona del virus Virus de la Cría Ensacada fue utilizada para...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Abejas melíferas; Virus; Cría ensacada; Inmunodifusión.
Ano: 2016 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1668-34982016000200009
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Virus de Distemper Canino: detección molecular de diferentes aislamientos provenientes de perros de la provincia de santa fe, argentina, entre los años 2000 y 2010 InVet
Pinotti,M.; Gollan,A; Canavesio,M.; Passeggi,C.; Larrateguy,M.V.; Paz,M.E.; Formentini,E..
En la ciudad de Santa Fe, Argentina, durante los años 2000 y 2010, se aislaron 13 cepas autóctonas del virus Distemper Canino. Las muestras se tomaron de caninos con signos clínicos de la enfermedad y consistieron en hisopados nasales, oculares, faríngeos (tonsilas) y conjuntivales. Los aislamientos se realizaron en células MDCK, las cuales mostraron efecto citopatogénico característico. Los virus provenientes de la cosecha, se detectaron por RT-PCR de una región que codifica la nucleoproteína NP asociada al RNA (posición 769 a la 1055 del genoma) obteniéndose en todos los casos un producto de 287 pb comparable con el obtenido con cepas vacunales (cepas Ondersterpoort y Lederle), lo que indica presencia viral en todas las muestras procesadas. Las cepas...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Virus; Distemper canino; Estudio molecula; RT-PCR.
Ano: 2016 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1668-34982016000200007
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Outbreaks of Ebola virus disease in Africa: the beginnings of a tragic saga J. Venom. Anim. Toxins incl. Trop. Dis.
Chippaux,Jean-Philippe.
The tremendous outbreak of Ebola virus disease occurring in West Africa since the end of 2013 surprises by its remoteness from previous epidemics and dramatic extent. This review aims to describe the 27 manifestations of Ebola virus that arose after its discovery in 1976. It provides an update on research on the ecology of Ebola viruses, modes of contamination and human transmission of the disease that are mainly linked to close contact with an infected animal or a patient suffering from the disease. The recommendations to contain the epidemic and challenges to achieve it are reminded.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ebola; Outbreak; Virus; Hemorrhagic fever; Africa.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992014000200209
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Microbial control of arthropod pests of tropical tree fruits Neotropical Entomology
Dolinski,Claudia; Lacey,Lawrence A..
A multitude of insects and mites attack fruit crops throughout the tropics. The traditional method for controlling most of these pests is the application of chemical pesticides. Growing concern on the negative environmental effects has encouraged the development of alternatives. Inundatively and inoculatively applied microbial control agents (virus, bacteria, fungi, and entomopathogenic nematodes) have been developed as alternative control methods of a wide variety of arthropods including tropical fruit pests. The majority of the research and applications in tropical fruit agroecosystems has been conducted in citrus, banana, coconut, and mango. Successful microbial control initiatives of citrus pests and mites have been reported. Microbial control of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacteria; Virus; Fungus; Nematode.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2007000200001
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The Role of Carbohydrates in Infection Strategies of Enteric Pathogens OAK
Kato, Kentaro; Ishiwa, Akiko; 加藤, 健太郎.
Enteric pathogens cause considerable public health concerns worldwide including tropical regions. Here, we review the roles of carbohydrates in the infection strategies of various enteric pathogens including viruses, bacteria and protozoa, which infect the epithelial lining of the human and animal intestine. At host cell entry, enteric viruses, including norovirus, recognize mainly histo-blood group antigens. At the initial step of bacterial infections, carbohydrates also function as receptors for attachment. Here, we describe the function of carbohydrates in infection by Salmonella enterica and several bacterial species that produce a variety of fimbrial adhesions. During invasion by enteropathogenic protozoa, apicomplexan parasites utilize sialic acids...
Palavras-chave: Bacteria; Carbohydrate; Enteric pathogen; Infection; Protozoa; Virus.
Ano: 2015 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4299
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Sequence similarity between the viral cp gene and the transgene in transgenic papayas PAB
Souza Júnior,Manoel Teixeira; Gonsalves,Dennis.
The Papaya ringspot virus (PRSV) coat protein transgene present in 'Rainbow' and 'SunUp' papayas disclose high sequence similarity (>89%) to the cp gene from PRSV BR and TH. Despite this, both isolates are able to break down the resistance in 'Rainbow', while only the latter is able to do so in 'SunUp'. The objective of this work was to evaluate the degree of sequence similarity between the cp gene in the challenge isolate and the cp transgene in transgenic papayas resistant to PRSV. The production of a hybrid virus containing the genome backbone of PRSV HA up to the Apa I site in the NIb gene, and downstream from there, the sequence of PRSV TH was undertaken. This hybrid virus, PRSV HA/TH, was obtained and used to challenge 'Rainbow', 'SunUp', and an...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carica papaya; Potyvirus; Resistance; Breeding; Virus.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000500009
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Occurrence of Aceria tosichella in Brazil PAB
Pereira,Paulo Roberto Valle da Silva; Navia,Denise; Salvadori,José Roberto; Lau,Douglas.
The objective of this work was to evaluate the occurrence of Aceria tosichella Keifer (Prostigmata: Eriophyidae), the wheat curl mite, in Rio Grande do Sul, Brazil. Samples to detect A. tosichella specimens were collected in wheat, corn, oat crops and potential host grasses in 46 localities, in October 2006, August and October 2007. Samples of wheat were also collected in experimental greenhouses at Embrapa Trigo, Passo Fundo, RS, Brazil. A. tosichella specimens were found in wheat samples from Passo Fundo, Palmeira das Missões, São Luís Gonzaga, and Santo Antônio das Missões, RS, Brazil. Symptoms due to A. tosichella infestations were observed only in greenhouse conditions. This is the first report of A. tosichella in Brazil and the second in South America.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Eriophyoidea; South America; Acari; Cereal; Quarantine; Virus.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000500015
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Turnip mosaic virus infecting kale plants in Ordu, Turkey Phyton
Sevik,MA.
Brassica oleracea var. acephala L. (kale) is widely grown in the Black Sea Region of Turkey. Kale growing has not been common in the other regions of Turkey. A number of diseases can seriously afect Brassica crop production. Field surveys were done to determine the occurrence of viruses in kale-growing areas in Ordu in 2013-2014. Leaf samples were collected from kale plants and tested for the presence of Turnip mosaic virus (TuMV), Cauliflower mosaic virus (CaMV), Turnip yellow mosaic virus (TYMV), and Cucumber mosaic virus (CMV) by DAS-ELISA and bioassays. Result of serological and biological tests showed that 7.7% of these samples were infected with TuMV. However, CaMV, CMV, and TYMV were not detected in any of the tested kale plants. The occurrence of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brassica; Kale; Survey; Disease; Virus.
Ano: 2016 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000200009
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Primer reporte de Tobacco mosaic virus (TMV) y Poinsettia mosaic virus (PnMV) en nochebuena de sol (Euphorbia pulcherrima Willd. Ex Klotzch) en México Phyton
Ocampo Ocampo,T; Ochoa Martínez,DL; Ramírez Rojas,S; Valdovinos Ponce,G; Nava Díaz,C.
El Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), a través del Campo Experimental "Zacatepec" en el estado Morelos, inició un programa de mejoramiento genético de plantas silvestres y semicultivadas de nochebuena ("nochebuena de sol"). Dicho programa requiere de la generación de una base de datos fitosanitarios con tolerancia a los principales patógenos. México no cuenta con información sobre las enfermedades causadas por virus en la nochebuena de sol, por lo que el objetivo de la presente investigación fue generar datos preliminares sobre los virus asociados a estos materiales. Con base en los resultados obtenidos en las técnicas DAS-ELISA y RT-PCR, se reportan por primera vez en México los virus Tobacco mosaic virus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nochebuena silvestre; Nochebuena semicultivada; Virus; DAS-ELISA; RT-PCR.
Ano: 2013 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572013000200011
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EVA: EQUINE VIRAL ARTERITIS AND THE U.S. HORSE INDUSTRY AgEcon
Garber, Lindsey.
The National Animal Health Monitoring System (NAHMS) is sponsored by the USDA:APHIS:Veterinary Services (VS). The NAHMS Equine '98 Study was designed to provide information about the nation's equine population for education and research purposes. Equine viral arteritis population for education and research purposes. Equine viral arteritis (EVA) is an infectious disease caused by the equine arteritis virus (EAV). It can cause abortion in pregnant mares and death in young foals. Breeding stallions may become permanent carriers of the virus. Financial losses may include those due to abortion and/or disease and death in very young foals, reduced demand to breed and/or decreased commercial value of persistently infected stallions, and denied export market for...
Tipo: Report Palavras-chave: NAHMS; Horse; Equine; Equid; Pony; Stallion; Mare; Foal; Breeding; Equine viral arteritis; EVA; Abortion; Virus; Export; EAV; Equine arteritis virus; Racing; Vaccination; Titer; Breed; Standardbred; Livestock Production/Industries.
Ano: 2000 URL: http://purl.umn.edu/32749
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NEW OCCURANCE OF AVIAN ENCEPHALOMYELITIS IN BROILER - IS THIS AN EMERGING DISEASE? Rev. Bras. Ciênc. Avic.
de,Freitas ES; Back,A.
ABSTRACTAvian encephalomyelitis is caused by an Hepatovirus and primarily affects chickens. Chickens of all ages are susceptible to the virus, but the nervous symptoms are manifested only in young chicks, between one to five weeks of age. During the last thirty years, avian encephalomyelitis appeared to be well controlled by breeder vaccination. However, the increase of the number of cases is causing concern in the poultry industry. In the present study, we performed a retrospective analysis of the cases presenting histological lesions compatible with avian encephalomyelitis in broilers. The evaluated cases affected broilers from one to 35 days old from the southern region of Brazil. Only cases with compatible microscopic lesions and associated with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Reemerging; Disease; Young chickens; Virus.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000300399
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Investigation of Influenza A, West Nile and Newcastle Disease Viruses in Birds from the Pantanal Wetlands of Mato Grosso, Brazil Rev. Bras. Ciênc. Avic.
Pinto,LB; Ometto,T; Araújo,J; Thomazelli,LM; Seixas,MM; Barbosa,CM; Ramos,DGS; Melo,ALT; Pinho,JB; Durigon,EL; Aguiar,DM.
ABSTRACT The Pantanal is the world's largest wetland biome with a seasonal flood pulse that attracts a great diversity of birds, many of which are migratory. Birds can be natural reservoirs Influenza A, West Nile and Newcastle Disease viruses. However, the occurrence of carriers for these viruses in the Pantanal was not verified yet. The present study evaluated the occurrence of natural infection by Influenza A, WN and ND virus of birds in the municipality of Poconé, a subregion of the Pantanal in the state of Mato Grosso, Brazil. A total of 76 birds belonging to 11 orders and 20 families were captured using mist nets. The most representative order was Passeriformes, followed by the other nine orders, which included Columbiformes, Psittaciformes,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pantanal birds; Infectious Diseases; RT-PCR; QRT-PCR; Virus.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000200291
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Crimean-Congo haemorrhagic fever in ostriches: could it be a public health risk? MV&Z
Doretto Júnior, Luciano.
Crimean-Congo haemorrhagic fever is a zoonose caused by a virus of nairovirus genera, which maybe transmitted by ixodides ticks. The ostriches among other domestic and wild birds species are refractory to CCHF, but in humans the disease have shown to be lethal in 30% of the cases. The disease is disserninated in A ia, Africa and east of Europe. In the past few year in South Africa – The first country to produce and export ostriches, many cases of such disease were reported in people who work in slaughterhouses, as weU a people who deal with ostriches and/or diagnostic laboratory technician.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ostrich; Crimean-Congo haemorrhagic fever; Avian pathology; Virus; Nairovirus; Ticks avestruz; Febre hemorrágica crimean-congo; Patologia aviária; Vírus; Nairovirus; Carrapatos.
Ano: 1999 URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/3377
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Detección de infecciones mixtas en genotipos de caña de azúcar en Cuba Rev. Protección Veg.
Zardón,María A; Gallo,Araíz; Mesa,José M; Arencibia,Ariel; Zamora,Loidy; Sautié,Miguel; Casas,Mario A; La O,María L.
Los síntomas de amarilleamiento y clorosis presentan alta incidencia en el Banco de Germoplasma de la Caña de Azúcar de Cuba. El objetivo de este trabajo fue determinar su asociación con fitoplasmas, Xanthomonas albilineans (Ashby) Dowson, los virus del mosaico y de la hoja amarilla. Para ello se seleccionaron del Banco de Germoplasma aquellos genotipos que manifestaron síntomas de amarilleamiento y clorosis de forma sostenida durante el ciclo de vida del cultivo. Se diagnosticaron ambos virus empleando la técnica Reverso Transcriptasa-Reacción en Cadena de la Polimerasa (RT-PCR), mientras que X. albilineans y fitoplasmas fueron estudiados por PCR anidada. Del total de muestras, ocho resultaron positivas al virus de la hoja amarilla, tres al mosaico, ocho...
Tipo: Journal article Palavras-chave: Saccharum spp.; Virus; Fitoplasmas; Xanthomonas albilineans.
Ano: 2012 URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1010-27522012000200002
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Molecular-assisted selection for resistance to cassava mosaic disease in Manihot esculenta Crantz Scientia Agricola
Carmo,Cátia Dias do; Silva,Maiane Suzarte da; Oliveira,Gilmara Alvarenga Fachardo; Oliveira,Eder Jorge de.
The geminivirus complex known as cassava mosaic disease (CMD) is one of the most devastating viruses for cassava (Manihot esculenta Crantz). The aim of this study was to use molecular-assisted selection (MAS) to identify CMD-resistant accessions and ascertain promising crosses with elite Brazilian varieties. One thousand two hundred twenty-four accessions were genotyped using five molecular markers (NS169, NS158, SSRY028, SSRY040 and RME1) that were associated with resistance to CMD, along with 402 SNPs (single-nucleotide polymorphism). The promising crosses were identified using a discriminant analysis of main component (DAPC), and the matrix of genomic relationship was estimated with SNP markers. The CMD1 gene, previously described in M. glaziovii, was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Manihot esculenta; Breeding; Disease; Virus.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000600520
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Development of virus resistant transgenic papayas expressing the coat protein gene from a Brazilian isolate of Papaya ringspot virus Trop. Plant Pathol.
Souza Júnior,Manoel T.; Nickel,Osmar; Gonsalves,Dennis.
Translatable and nontranslatable versions of the coat protein (cp) gene of a Papaya ringspot virus (PRSV) isolate collected in the state of Bahia, Brazil, were engineered for expression in Sunrise and Sunset Solo varieties of papaya (Carica papaya). The biolistic system was used to transform secondary somatic embryo cultures derived from immature zygotic embryos. Fifty-four transgenic lines, 26 translatable and 28 nontranslatable gene versions, were regenerated, with a transformation efficiency of 2.7%. Inoculation of cloned R0 plants with PRSV BR, PRSV HA or PRSV TH, Brazilian, Hawaiian and Thai isolates, respectively, revealed lines with mono-, double-, and triple-resistance. After molecular analysis and a preliminary agronomic evaluation, 13 R1 and R2...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carica papaya; Potyvirus; Resistance; Breeding; Virus.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582005000400004
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Evaluación agronómica de accesiones de Capsicum del banco de germoplasma de la Universidad Nacional de Colombia Sede Palmira Acta Agron. (Palmira)
Pardey Rodríguez,Catherine; García Dávila,Mario Augusto; Vallejo Cabrera,Franco Alirio.
En un diseño de bloques incompletos 10 x 10 con tres repeticiones se estudiaron descriptores cuantitativos relacionados con producción por planta, contenido de capsaicina y presencia de virus en 100 accesiones de Capsicum pertenecientes a la Universidad Nacional de Colombia. Las diferencias entre las accesiones fueron explicadas por el contenido de capsaicina, características asociadas con la producción por planta y características del fruto. Se encontró correlación inversa entre el contenido de capsaicina y producción; número de frutos por planta con peso de fruto. La dispersión de las accesiones en el plano cartesiano situó las variedades comerciales Cayenne, Tabasco y Habanero, en función de producción, peso y cantidad de frutos, en posiciones...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pimentón; Ají; Producción; Capsaicina; Virus.
Ano: 2009 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122009000100004
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Herencia de la resistencia al virus del mosaico deformante del pimentón PepDMV en Capsicum Acta Agron. (Palmira)
García Dávila,Mario Augusto; Pardey Rodríguez,Catherine.
En busca de determinar el modo de herencia de la resistencia en tres materiales resistentes, se hicieron cruzamientos hacia tres líneas susceptibles. Se siguió el método del retrocruzamiento propuesto por Warner (1952) fundamentado en el modelo matemático de Fisher Immer y Tedin (1932) descrito con detalle por Mater (1949) y Jenkins (1982, 1984) en el cual se descompone la varianza genética en tres componentes: aditiva, dominancia y epistática. El modelo del retrocruzamiento incluye los dos parentales, el hibrido de la primera generación y la autofecunfación de la F1 para formar la población F2 y las retrocruzas hacia ambos padres. Las poblaciones fueron evaluadas a resistencia al virus del mosaico del pimentón PepDMV en condiciones de invernadero. Los...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanaceae; Ají; Virus; Resistencia varietal; Capsicum annuum; C. frutescens; C. chínense..
Ano: 2009 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122009000400013
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GARRAPATAS DURAS (ACARI: IXODIDAE) DE COLOMBIA, UNA REVISIÓN A SU CONOCIMIENTO EN EL PAÍS Acta biol.Colomb.
ACEVEDO-GUTIÉRREZ,Leidy Yoana; PATERNINA,Luis Enrique; PÉREZ-PÉREZ,Juan Camilo; LONDOÑO,Andrés Felipe; LÓPEZ,Gustavo; RODAS,Juan David.
RESUMEN Las garrapatas son artrópodos de gran impacto sobre la economía pecuaria y la salud humana debido a las pérdidas generadas en la producción, y a su capacidad de transmitir microorganismos. Pese a la evidencia de circulación de una gran diversidad de garrapatas en Colombia, no se cuenta con compilaciones actualizadas de la variedad de especies presentes, por lo cual los autores presentan una revisión de literatura sobre las garrapatas de la familia Ixodidae reportadas en Colombia incluyendo su distribución geográfica, sus hospederos y los microorganismos reportados en aquellas especies registradas en este país. En la recopilación se evidenció la presencia en Colombia de diferentes especies de garrapatas de los géneros Amblyomma, Ixodes,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Artrópodos vectores; Artrópodos hematófagos; Bacteria; Distribución espacial; Infestación; Virus.
Ano: 2020 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2020000100126
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DESARROLLO DE UN POXVIRUS RECOMBINANTE QUE EXPRESA LA GLICOPROTEÍNA D DEL HERPESVIRUS BOVINO-1 Acta biol.Colomb.
RUIZ SÁENZ,JULIÁN; OSORIO,JORGE E; VERA,VÍCTOR J.
El herpesvirus bovino-1 (BHV-1) es un virus de genoma DNA perteneciente a la familia Herpesviridae, el cual afecta al bovino en el que provoca un amplio espectro de manifestaciones clínicas y pérdidas económicas. El principal componente inmunogénico de su envoltura es la glicoproteína D (gD), la cual ha sido caracterizada y utilizada como inmunógeno en distintos sistemas de expresión. El objetivo de este trabajo fue generar un poxvirus recombinante (Raccoonpox [RCN]) que expresara una versión truncada de la gD del BHV-1 para ser usado como inmunógeno. Para ello, se amplificó el gen que codifica para la versión truncada de la gD, la cual se clonó en el plásmido de transferencia pTK/ IRES/tpa que posee sitios de homología a la timidinakinasa del poxvirus, un...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bovino; Clonación molecular; Rinotraqueitis; Vacunas; Virus; Vectores genéticos.
Ano: 2012 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2012000300004
Registros recuperados: 115
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