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Registros recuperados: 38
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Aggressive Citrus tristeza virus isolates in Chile are MCA13-positive and VT type, while mild isolates are MCA13-negative and T30 type Ciencia e Investigación Agraria
Besoain,Ximena; Bertolini,Edson; Camps,Rocío; Ramella,Fiona; Gorris,María Teresa; Torres,Margarita; Cambra,Mariano.
Citrus tristeza virus (CTV) was reported in the 1960's to affect Meyer lemon trees in Chile, but no field symptoms were observed. This study performed a complete biological, serological and molecular characterization of one hundred CTV isolates obtained from different hosts and geographical origins. Decline symptoms (DI) were not found on trees grafted onto sour orange. In Pica Oasis in northern Chile, stem pitting (SP) was found to affect grapefruit and Mexican lime trees. Most isolates present in the central area were considered mild (MCA-13-negative), while in the northern area aggressive isolates were observed and detected. Some of these isolates were capable of causing SP on grapefruit under field and greenhouse conditions and on sweet orange under...
Tipo: Journal article Palavras-chave: Biological indexing; CTV; Molecular characterization; Stem pitting; Seedling yellows.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000200011
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Biological and molecular characterization of Streptococcus crista strains isolated from human dental biofilm by means of arbitrary primers - PCR (AP-PCR) BJM
Angelini,Michelle; Silveira,Wanderley Dias da; Campos,Tatiana Amabile de; Cai,Silvana; Castro,Antonio Fernando Pestana de.
Streptococcus ssp are important components of the dental biofilm and Streptococcus crista is considered to be an interesting model of bacterial interactions taking place in this biofilm. In the present work, S. crista strains were isolated from the dental biofilm of Brazilian individuals and studied with respect to their biological characteristics and their molecular profile by means of AP-PCR techniques, using the RR2, 434, OPR2, OPR8, and OPR13 primers. Results allowed us to build a similarity dendrogram. Analysis of the similarity dendrogram allowed the separation of the studied strains into similarity groups. All isolates presented fibril tufts by Transmission Electron Microscopy (TEM). These isolates were able to bind to salivary amylase and to adhere...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biological characterization; Molecular characterization; Dendrogram analysis; Biofilm.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000200005
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Caracterización cualitativa de frutos de rambutan (Nephelium lappaceum L.), almacenamiento postcosecha y patógenos asociados. Colegio de Postgraduados
Hernández Arenas, Marian Guadalupe.
El rambutan (Nephelium lappaceum L.) es un frutal tropical originario de Asia e introducido a México. Es cultivado principalmente en el estado de Chiapas pero su comercialización es limitada por una corta vida en anaquel, oscurecimiento del pericarpio y enfermedades postcosecha. Los objetivos de este trabajo fueron: 1) caracterizar frutos de cinco selecciones de rambután procedentes del estado de Chiapas; 2) estudiar el efecto de una cera y dos atmósferas modificadas a temperatura ambiente y refrigeración sobre la calidad visual y vida en anaquel de los frutos y 3) identificar el agente causal de la mancha negra del rambutan en postcosecha. Los frutos fueron cosechados entre Junio y Agosto del 2007 y 2008 en Tuxtla Chico, Chiapas. Se realizaron estudios de...
Palavras-chave: Calidad de frutos; Conservación postcosecha; Patógenos; Endófitos; Caracterización molecular; Fruit quality; Postharvest conservation; Pathogens; Endophytes; Molecular characterization; Doctorado; Fitopatología.
Ano: 2010 URL: http://hdl.handle.net/10521/155
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Caracterización cualitativa de frutos de rambutan (Nephelium lappaceum L.), almacenamiento postcosecha y patógenos asociados. Colegio de Postgraduados
Hernández Arenas, Marian Guadalupe.
El rambutan (Nephelium lappaceum L.) es un frutal tropical originario de Asia e introducido a México. Es cultivado principalmente en el estado de Chiapas pero su comercialización es limitada por una corta vida en anaquel, oscurecimiento del pericarpio y enfermedades postcosecha. Los objetivos de este trabajo fueron: 1) caracterizar frutos de cinco selecciones de rambután procedentes del estado de Chiapas; 2) estudiar el efecto de una cera y dos atmósferas modificadas a temperatura ambiente y refrigeración sobre la calidad visual y vida en anaquel de los frutos y 3) identificar el agente causal de la mancha negra del rambutan en postcosecha. Los frutos fueron cosechados entre Junio y Agosto del 2007 y 2008 en Tuxtla Chico, Chiapas. Se realizaron estudios de...
Palavras-chave: Calidad de frutos; Conservación postcosecha; Patógenos; Endófitos; Caracterización molecular; Fruit quality; Postharvest conservation; Pathogens; Endophytes; Molecular characterization; Doctorado; Fitopatología.
Ano: 2010 URL: http://hdl.handle.net/10521/155
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Caracterización organísmica y genética en poblaciones de Morchella spp. en bosques de Abies religiosa del centro de México. Colegio de Postgraduados
Hernández Hernández, Ismael.
Se realizó la caracterización organísmica y genética en poblaciones de Morchella spp. de bosques puros de Abies religiosa de la región Central de México, con niveles contrastantes de contaminación atmosférica. El trabajo se desarrolló en dos fases: la primera en campo y la segunda en el laboratorio. En la fase de campo se emplearon sitios permanentes de tamaño variable en: (1) área de influencia del Parque Nacional Desierto de los Leones, D.F. (DDL); (2) Cerro Tláloc, Edo. Mex. (T); (3) área de influencia del Parque Nacional Izta-Popo, Puebla (IP) y (4) Reserva de la Biósfera de la Mariposa Monarca, Mich (MM); para el muestro de ascomas y suelo adyacente con raíces. La fase de laboratorio consistió en: (1) Pruebas de identificación ascomas-raíces de...
Palavras-chave: Abies religiosa; Caracterización molecular; Incompatibilidad somática; Espacio transcrito interno; Morchella; Número de núcleos; Molecular characterization; Somatic incompatibility; Internal transcribed spacer; Number of nuclei; Genética; Maestría.
Ano: 2012 URL: http://hdl.handle.net/10521/1724
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Caracterización y selección de genotipos de cepas comerciales de "setas" (Pleurotus), como acción estratégica para la producción rural en Cuyoaco, Puebla. Colegio de Postgraduados
Morgado González, Aurora.
Existe una gran diversidad de cepas comerciales de Pleurotus (setas) que no han sido caracterizadas tanto molecular como morfológicamente en los ceparios del país, este material biológico almacenado, posee una amplia variedad de características deseables para la producción rural, así como para el almacenamiento y consumo. En la presente investigación se realizó la caracterización molecular y morfológica de 17 cepas comerciales. Así mismo, las cepas se sembraron en invierno (2009) y primavera (2010) para determinar su precocidad y productividad, así como la estimación de la vida de anaquel, y finalmente se realizó una prueba hedónica en el Colegio de Postgraduados Campus Puebla y otra en la ciudad de Libres, Puebla. En el análisis filogenético se obtuvieron...
Palavras-chave: Cepas comerciales; Pleurotus spp; Caracterización molecular y morfológica; Selección de cepas; Cuyoaco; Commercial strains; Molecular characterization; Mushroom production; Puebla; Maestría; Estrategias para el Desarrollo Agrícola Regional; EDAR.
Ano: 2011 URL: http://hdl.handle.net/10521/445
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Caracterización y selección de genotipos de cepas comerciales de "setas" (Pleurotus), como acción estratégica para la producción rural en Cuyoaco, Puebla. Colegio de Postgraduados
Morgado González, Aurora.
Existe una gran diversidad de cepas comerciales de Pleurotus (setas) que no han sido caracterizadas tanto molecular como morfológicamente en los ceparios del país, este material biológico almacenado, posee una amplia variedad de características deseables para la producción rural, así como para el almacenamiento y consumo. En la presente investigación se realizó la caracterización molecular y morfológica de 17 cepas comerciales. Así mismo, las cepas se sembraron en invierno (2009) y primavera (2010) para determinar su precocidad y productividad, así como la estimación de la vida de anaquel, y finalmente se realizó una prueba hedónica en el Colegio de Postgraduados Campus Puebla y otra en la ciudad de Libres, Puebla. En el análisis filogenético se obtuvieron...
Palavras-chave: Cepas comerciales; Pleurotus spp; Caracterización molecular y morfológica; Selección de cepas; Cuyoaco; Commercial strains; Molecular characterization; Mushroom production; Puebla; Maestría; Estrategias para el Desarrollo Agrícola Regional; EDAR.
Ano: 2011 URL: http://hdl.handle.net/10521/445
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Cloning, mapping and molecular characterization of porcine progesterone receptor membrane component 2 (PGRMC2) gene Genet. Mol. Biol.
Chen,Congying; Sargent,Carole; Quilter,Claire; Yang,Zhuqing; Ren,Jun; Affara,Nabeel; Brenig,Bertram; Huang,Lusheng.
Progesterone plays an important role in sow reproduction by stimulating classic genomic pathways via nuclear receptors and non-genomic pathways via membrane receptors such a progesterone receptor membrane component 2 (PGRMC2). In this work, we used radiation hybrid mapping to assign PGRMC2 to pig chromosome 8 and observed that this receptor has two transcripts in pigs. The full-length cDNA of the large transcript is 1858 bp long and contains a 669-bp open reading frame (ORF) encoding a protein of 223 amino acids. The shorter transcript encodes a protein of 170 amino acids. The porcine PGRMC2 gene consists of three exons 446 bp, 156 bp and 1259 bp in length. The promoter sequence is GC-rich and lacks a typical TATA box. Several putative cis-regulatory DNA...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Expression profile; Molecular characterization; Physical mapping.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000300015
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Comparative study of the discriminating capacity of DNA markers and their effectiveness in establishing genetic relationships in the genus Tigridia Agrociencia
Reyes-Díaz,Jesús I.; Arzate-Fernández,Amaury M.; Piña-Escutia,José L.; Vázquez-García,Luis M..
Tigridia Jussieu is an endemic genus to Mexico and taxonomically difficult with limited information about its genetic variability. A diversity assessment conducted using different DNA markers as an inter simple sequence repeat (ISSR) and random amplified polymorphic DNA (RAPD) markers will be helpful in the establishment of a broad-based description for improved germplasm curation and the identification of germplasm for genome mapping and breeding of these species. Thus, the objective of this study was to characterize 15 wild species of Tigridia by using RAPD and ISSR molecular markers. This study was carried out in the laboratory of Plant Molecular Biology at the Faculty of Agricultural Sciences of the Universidad Autónoma del Estado de México between...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Iridaceae; RAPD; ASSR; Molecular characterization.
Ano: 2015 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952015000400002
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Contenidos de taninos y caracterización molecular de variedades de haba (Vicia faba L.) cultivadas por agricultores. Colegio de Postgraduados
Jordan Aguilar, Bladimir.
En México el haba (Vicia faba L.) es importante para la alimentación de los habitantes del medio rural y urbano, contiene un alto contenido nutritivo, es un alimento balanceado, asimismo en la actualidad los productores demandan variedades con mayor calidad de semilla. El rango en cuanto al contenido de taninos en las semillas de haba cultivadas por los agricultores fue determinado, se estimaron las relaciones entre las variedades de haba mediante la utilización de marcadores moleculares tipo RAPD y microsatélites y se propone una estrategia de aprovechamiento de las variedades por los productores de haba con base a los caracteres estudiados. El desarrollo de este estudio se realizó en dos etapas, la primera consistió en la determinación del contenido de...
Palavras-chave: Taninos; Caracterización molecular; Variedades de haba; Líneas estratégicas; Tannin; Molecular characterization; Varieties of faba bean; Strategy lines.
Ano: 2011 URL: http://hdl.handle.net/10521/438
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Contenidos de taninos y caracterización molecular de variedades de haba (Vicia faba L.) cultivadas por agricultores. Colegio de Postgraduados
Jordan Aguilar, Bladimir.
En México el haba (Vicia faba L.) es importante para la alimentación de los habitantes del medio rural y urbano, contiene un alto contenido nutritivo, es un alimento balanceado, asimismo en la actualidad los productores demandan variedades con mayor calidad de semilla. El rango en cuanto al contenido de taninos en las semillas de haba cultivadas por los agricultores fue determinado, se estimaron las relaciones entre las variedades de haba mediante la utilización de marcadores moleculares tipo RAPD y microsatélites y se propone una estrategia de aprovechamiento de las variedades por los productores de haba con base a los caracteres estudiados. El desarrollo de este estudio se realizó en dos etapas, la primera consistió en la determinación del contenido de...
Palavras-chave: Taninos; Caracterización molecular; Variedades de haba; Líneas estratégicas; Tannin; Molecular characterization; Varieties of faba bean; Strategy lines.
Ano: 2011 URL: http://hdl.handle.net/10521/438
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Detection by Rt-Pcr and Molecular Characterization of Tremovirus A Obtained from Clinical Cases of Avian Encephalomyelitis (AE) Outbreaks in Brazil Rev. Bras. Ciênc. Avic.
Torre,D De la; Nuñez,LF; Parra,SHS; Astolfi-Ferreira,CS; Ferreira,AJP.
ABSTRACT This study determined the presence of Tremovirus A as the possible agent related to Avian Encephalomyelitis in broiler chicks from the states of São Paulo (SP) Paraná (PR), Goiás (GO), Santa Catarina (SC) and Rio Grande do Sul (RS), between the years 2006 and 2015. Samples of the nervous, digestive, respiratory, immune, and renal systems, plus muscular organs from broiler chicks with neurological problems such as ataxia and muscle tremors, and four (4) commercial vaccines as positive control, were tested by reverse-transcriptase (RT-PCR) amplification and DNA sequencing. A highly conserved region (P1) of the viral genome, was used to amplify a segment which encodes a structural protein VP4. Out of 112 samples, 46 were positive (42%) for Tremovirus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chicken; Tremovirus A; Avian Encephalomyelitis; Detection; Molecular characterization.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000300527
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Development of an SSR-based identification key for Tunisian local almonds Scientia Agricola
Gouta,Hassouna; Ksia,Elhem; Buhner-Zaharieva,Tatiana; Mliki,Ahmed; Gogorcena,Yolanda.
Ten simple sequence repeat (SSR) loci were used to study polymorphism in 54 almond genotypes. All genotypes used in this study originated from almond-growing areas in Tunisia with different climatic conditions ranging from the sub-humid to the arid and are preserved in the national collection at Sidi Bouzid. Using ten SSR, 130 alleles and 250 genotypes were revealed. In order to develop an identification key for each accession, the data were analysed separately for each microsatellite marker. The most polymorphic microsatellite (CPDCT042) was used as a first marker. Two microsatellite loci (CPDCT042 and CPDCT025) were sufficient to discriminate among all accessions studied. Neighbour-joining clustering and principal coordinate analysis were performed to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Prunus dulcis Mill; Genetic diversity; Genetic resources; Microsatellites; Molecular characterization.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162012000200004
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Genetic divergence among and within Colletotrichum lindemuthianum races assessed by RAPD Trop. Plant Pathol.
Talamini,Viviane; Souza,Elaine A.; Pozza,Edson A.; Silva,Gilvan F.; Ishikawa,Francine H.; Camargo Júnior,Osnil A..
Genetic divergence within and among races of Colletotrichum lindemuthianum was determined using RAPD markers. In addition to the different races of the fungus three isolates of the sexual stage of Colletotrichum lindemuthianum (Glomerella cingulata f.sp. phaseoli) were included in this study. The band patterns generated using 11 primers produced 133 polymorphic bands. The polymorphic bands were used to determine genetic divergence among and within the pathogen races. The isolates analyzed were divided into six groups with 0.75 relative similarity. Group VI, formed by three isolates of the sexual phase of Colletotrichum lindemuthianum, was the most divergent. Races previously determined using differential cultivars did not correlate with the results...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phaseolus vulgaris; Common bean; DNA; Molecular characterization; Variability.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582006000600002
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Genetic divergence among Dimorphandra spp. accessions using RAPD markers Ciência Rural
Sudré,Cláudia Pombo; Rodrigues,Rosana; Gonçalves,Leandro Simões Azeredo; Martins,Ernane Ronie; Pereira,Messias Gonzaga; Santos,Marilene Hilma dos.
The genus Dimorphandra has distinguish relevance considering either medicinal or biodiversity aspects because it includes two species that are economically important flavonoids sources for pharmachemical industry (D. mollis Benth. and D. gardneriana Tul.), and species endemic to Brazil, such as D. jorgei Silva and D. wilsonii Rizz., threatened by extinction. In order to evaluate variability among accessions of D. mollis (fava-d'anta), D. gardneriana and D. wilsonii, it was collected fruit from individual plants from three Brazilian states in a total of 57 accessions, which were analyzed with RAPD markers. It was used 20 seeds per progeny; the DNA was extracted from fully-formed young leaves, which were collected in bulk. The data were analyzed using a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fava-d'ant; Molecular characterization; Plant genetic resource; Germoplasm.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000400010
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Genetic divergence in basil cultivars and hybrids Horticultura Brasileira
Alves,Rodrigo P; Silva,Ana Veruska C; Almeida-Pereira,Camila S; Costa,Tatiana S; Alvares-Carvalho,Sheila V; Arrigoni-Blank,Maria de Fatima; Blank,Arie F.
ABSTRACT Basil is an aromatic herb that stands out for its economic importance. It is consumed in natura and used to obtain essential oil. The cultivation of this species in several regions of the world has allowed variations by natural crosses and euploidy, leading to the wide genetic variability found nowadays. Considering the importance of this species, we aimed to analyze the genetic diversity of 27 basil genotypes using ISSR molecular markers. Fourteen primers were employed for DNA amplification, resulting in 86% polymorphism. Based on the Jaccard’s dissimilarity index, the highest index (0.80) was observed between the individuals BAS001 and BAS012, while the lowest index (0.18) was detected between the genotypes BAS014 and BAS015. The genetic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ocimum basilicum; Diversity; Molecular characterization; Dominant marker.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000200180
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Genetic diversity and population structure of endangered rosewood from the Peruvian Amazon using ISSR markers Acta Amazonica
GUIZADO,Stalin Juan Vasquez; NADEEM,Muhammad Azhar; ALI,Fawad; BARUT,Muzaffer; HABYARIMANA,Ephrem; GÓMEZ,Tedi Pacheco; SANTILLAN,Jhon Antoni Vargas; CANALES,Esperanza Torres; GÓMEZ,Juan Carlos Castro; CHUNG,Gyuhwa; BALOCH,Faheem Shehzad.
ABSTRACT Rosewood, Aniba rosaeodora is an endangered species in Amazon forests and its natural stands have been heavily depleted due to over-exploitation for the cosmetic industry. This study aimed to investigate the genetic diversity and population structure of 90 rosewood accessions from eight localities in the Peruvian Amazon through 11 Inter Simple Sequence Repeats (ISSR) primers. The ISSR primers produced a sum of 378 bands, of which 375 (99.2%) were polymorphic, with an average polymorphism information content (PIC) value of 0.774. The mean effective number of alleles (Ne), Shannon informative index (I), gene diversity (He) and total gene diversity (Ht) were 1.485, 0.294, 0.453 and 0.252, respectively. Analysis of molecular variance (AMOVA) showed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aniba rosaeodora; Endangered species; Gene flow; Germplasm; Molecular characterization.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000300204
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Genetic similarity between coriander genotypes using ISSR markers Horticultura Brasileira
Melo,Roberto de A; Resende,Luciane V; Menezes,Dimas; Beck,Ana Paula A; Costa,José Carlos da; Coutinho,Alisson E; Nascimento,Ana Verônica S do.
With the development of new cultivars, a precise genetic characterization is essential for improvement programs or for cultivar registration and protection. Molecular markers have been complementing the traditional morphological and agronomic characterization techniques because they are virtually unlimited, cover the whole genome and are not environmentally influenced. Genetic characterization constitutes the basis for studies involving estimates of genetic similarity. Therefore, the objective of the present study was to evaluate the genetic similarity between ten coriander genotypes (nine cultivars and one line) using ISSR markers. The cultivars used were: Americano, Asteca, Palmeira, Português, Santo, Supéria, Tabocas, Tapacurá, Verdão and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coriandrum sativum L; Molecular characterization; Microsatellites; Condiments.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362011000400014
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Genetic similarity of Brazilian hull-less and malting barley varieties evaluated by RAPD markers Scientia Agricola
Kroth,Mariela Aparecida; Ramella,Micheline Sandra; Tagliari,Caroline; Francisco,Alicia de; Arisi,Ana Carolina Maisonnave.
Barley (Hordeum vulgare L.) is widely used for brewing and animal feed. Recently, it has become desirable for human consumption due to its high nutritional significance, specially hull-less or naked barley. There are differences in nutritional and malting characteristics among barley varieties. RAPD procedure is able to separate barley varieties at various similarity levels. The aim of this work was the RAPD analysis of six Brazilian hull-less varieties and seven malting varieties. PCR reactions were performed with eleven random primers. A total of 34 RAPD fragments was obtained with five primers. A dendrogram was constructed based on the Jaccard similarity coefficient. Barley varieties displayed an average similarity coefficient of 0.53. Intravarietal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hordeum vulgare; Polymorphism; Molecular characterization.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000100007
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Identification and Molecular Characterization of Norovirus in São Paulo State, Brazil BJM
Morillo,Simone Guadagnucci; Audrey,Cilli; Carmona,Rita de Cássia Compagnoli; Timenetsky,Maria do Carmo Sampaio Tavares.
Norovirus (NoV), previously called Norwalk-like virus, represents an important group of human pathogens associated with outbreaks of nonbacterial gastroenteritis. Epidemiological surveys of outbreaks have shown that the most important routes of transmission are person-to-person contacts and contaminated food and water, with the virus affecting adults and children. NoV is classified into genogroups, being genogroups GI, GII and GIV found in humans. In view of the high genetic diversity of NoV and the lack of information about this virus in Brazil, the aim of the present study was the molecular characterization of NoV isolated from diarrheic stool samples of patients from São Paulo State. In this study, 204 stool specimens collected during diarrhea outbreaks...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Norovirus; Genogroup GII; Molecular characterization.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000400004
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