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Registros recuperados: 31
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An outbreak of Acinetobacter baumannii septicemia in a neonatal intensive care unit of a university hospital in Brazil BJID
Brito,Denise von Dolinger de; Oliveira,Elias José; Abdallah,Vânia O. Steffen; Darini,Ana Lúcia da Costa; Gontijo Filho,Paulo P..
We studied an outbreak of two multi-drug resistant clones of Acinetobacter baumannii in the Neonatal Intensive Care Unit of the Uberlândia Federal University Hospital in Minas Gerais state, Brazil, and we analyzed the contribution of cross-transmission in the rise in infection rates. Eleven neonates who developed multi-drug resistant A. baumannii nosocomial infection were matched to 22 neonates who were admitted to the same unit and did not develop an infection during the outbreak period, in order to identify risk factors for infection. Three out of the 11 neonates died. Epidemiological investigation included molecular typing, using pulsed field gel electrophoresis. Prior to the outbreak, from December 2001 to March 2002, no case of infection by this...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acinetobacter baumannii; Molecular epidemiology; Outbreak; Neonates.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702005000400006
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Aspectos epidemiológicos da babesiose bovina na amazônia sul ocidental: avaliação molecular. Infoteca-e
BRITO, L. G.; OLIVEIRA, M. C. de S.; NETTO, F. G. da S.; CAVALCANTE, F. A.; SOUZA, G. C. R. de; BEZERRA, J. E. G.; MORENO, A.; SOUZA, C. C. S..
A babesiose bovina, causada pelos protozoários intraerotrocíticos Babesia bovis e B. bigemina tem como principal vetor Rhipicephalus (Boophilus) microplus, sendo este o único vetor biológico dos parasitas da família Babesiidae no Brasil. Clinicamente as babesioses caracterizam-se por febre, anemia, hemoglobinemia, hemoglobinúria e fraqueza, podendo evoluir para a morte em casos graves da doença, estando a gravidade da enfermidade diretamente relacionada à reação do hospedeiro frente à infecção. B. bovis e B. bigemina, espécies que ocorrem simultaneamente em várias regiões do mundo acompanhando a presença do vetor. As perdas ocasionadas pela babesiose bovina são atribuídas ao menor ganho de peso dos animais, decréscimo na produção de leite, infertilidade de...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Molecular epidemiology; Babesiosis; Bovino; Rondônia; Acre; Epidemiologia; Bovino; Babesiose; Biologia Molecular.
Ano: 2007 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/47796
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Co-circulation of genotypes IA and IB of hepatitis A virus in Northeast Brazil BJMBR
Villar,L.M.; Morais,L.M.; Aloise,R.; Melo,M.M.M.; Calado,I.A.; Lampe,E.; Gaspar,A.M.C..
The Northeast region is the location of most cases of acute hepatitis A virus (HAV) in Brazil. In the present study, the genotypes of HAV strains from Pernambuco State, one of most populous states in the Northeast region, were characterized. Blood samples positive for anti-HAV IgM from 145 individuals (mean age = 29.1 years), collected during 2002 and 2003, were submitted to nested RT-PCR for amplification of the 5'non-translated region (5'NTR) and VP1/2A regions of the HAV genome. The VP1/2A and 5'NTR regions were amplified in 39 and 21% of the samples, respectively. Nucleotide sequencing was carried out in 46% of VP1/2A and in 53% of 5'NTR isolates. The identity in nucleotide sequence of the VP1/2A region ranged from 93.6 to 100.0%. Phylogenetic analysis...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hepatitis A virus; Molecular epidemiology; Sub-genotype IA; Sub-genotype IB.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000700004
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Desmodus rotundus and Artibeus spp. bats might present distinct rabies virus lineages BJID
Fahl,Willian Oliveira; Carnieli Jr,Pedro; Castilho,Juliana Galera; Carrieri,Maria Luiza; Kotait,Ivanete; Iamamoto,Keila; Oliveira,Rafael Novaes; Brandão,Paulo Eduardo.
In Brazil, bats have been assigned an increasing importance in public health as they are important rabies reservoirs. Phylogenetic studies have shown that rabies virus (RABV) strains from frugivorous bats Artibeus spp. are closely associated to those from the vampire bat Desmodus rotundus, but little is known about the molecular diversity of RABV in Artibeus spp. The N and G genes of RABV isolated from Artibeus spp. and cattle infected by D. rotundus were sequenced, and phylogenetic trees were constructed. The N gene nucleotides tree showed three clusters: one for D. rotundus and two for Artibeus spp. Regarding putative N amino acid-trees, two clusters were formed, one for D. rotundus and another for Artibeus spp. RABV G gene phylogeny supported the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rabies Bat Artibeus spp.; Desmodus rotundus; Phylogeny; Molecular epidemiology.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702012000600008
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Detecção de microorganismos utilizando a técnica de PCR em seqüências palindrômicas extragênicas repetidas (REP-PCR) no monitoramento da qualidade do leite de cabra, em sala de ordenha. Repositório Alice
OLIVINDO, C. de S..
Dissertação (Mestrado em Zootecnia) - Universidade Federal do Deará, Fortaleza. Orientador: Arturo Bernardo Selaive Villaroel; Co-orientadora: Léa Chapaval, Embrapa Caprinos (CNPC)
Tipo: Tese/dissertação (ALICE) Palavras-chave: PCR; REP-PCR; APPCC; BPA; BPF; Epidemiologia molecular; Identidades genômicas; Molecular epidemiology; Fingerprints; Caprino; Leite de cabra; Marcador molecular; Bactéria; Microorganismo; Ordenha; Qualidade; Goat milk.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/529082
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Detecção de Staphylococcus aureus utilizando a técnica de REP-PCR no monitoramento da qualidade do leite de cabra. Repositório Alice
OLIVINDO, C. de S.; CHAPAVAL, L.; VILLARROEL, A. B. S.; ALVES, F. S. F.; SOUSA, F. G. C. de; FERNANDES, F. E. P..
Resumo: Este estudo foi realizado com o objetivo de aplicar a técnica de REP-PCR no monitoramento da qualidade do leite de cabra por meio da detecção de Staphylococcus aureus em amostras de mãos de ordenhador, tetos das cabras, leite, ordenhadeira e água para estabelecimento e implantação do sistema de Análise de Perigos e Pontos Críticos de Controle (APPCC). Verificaram-se vários fingerprints de todos os isolados coletados das diferentes fontes estudadas (mãos de ordenhador, tetos das cabras, leite, ordenhadeira e água). Observaram-se comportamentos muito similares das bandas, o que indica que os isolados podem ser relatados como clones epidemiológicos. As mãos do ordenhador caracterizaram-se como ponto crítico de controle, pois se destacaram como...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Epidemiologia molecular; REP-PCR; Caprino; Leite de cabra; Staphylococcus aureus; Qualidade; Segurança alimentar; Goat milk; Molecular epidemiology; Brazil.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/660281
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Determinants of HIV-1 mother-to-child transmission in Southern Brazil Anais da ABC (AABC)
Martínez,Ana M.B.; Hora,Vanusa P. da; Santos,Adriana L. dos; Mendoza-Sassi,Raul; Von Groll,Andréa; Soares,Esmeralda A.J.M.; D'Ávila,Nildo; Silveira,Jussara; Leal,Renata G.; Tanuri,Amilcar; Soares,Marcelo A..
Different human immunodeficiency virus type 1 (HIV-1) subtypes may have distinct biological, immunological and pathogenic properties. Efficiency of mother-to-child transmission (MTCT) may be among those properties, but few and controversial results have been described so far. In this study, 102 children born from HIV-1-infected mothers between 1998 and 2004 in the city of Rio Grande, Brazil were analyzed for potential risk factors associated with MTCT. That geographic region is characterized by a high proportion of subtype C-infected subjects, and it allowed comparison between subtypes B and C and their influence on MTCT. The analysis also included clinical, obstetric and immunological parameters. Multivariate regression analyses were conducted to evaluate...
Tipo: Info:eu-repo/semantics/article Palavras-chave: HIV; MTCT; Vertical transmission; Subtype C; Molecular epidemiology.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000100011
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Distribution of N-acetyltransferase Type 1 (NAT1) genotypes and alleles in a Turkish population Genet. Mol. Biol.
Arslan,Serdal; Degerli,Naci; Bardakci,Fevzi.
NAT1 is an intronless gene on chromosome 8p21.3 encoding a 290-amino-acid-long protein showing acetyltransferase activity. Some 26 alleles of NAT1 gene have been identified in human populations. In the present study we determined the distributions of NAT1 genotypes and alleles in a sample of 201 individuals from the Turkish population in Central Anatolia. The most frequent genotypes were NAT1*4/NAT1*4 (51.74%), NAT1*10/NAT1*4 (22.39%), NAT1*11/NAT1*4 (7.46), NAT1*10/NAT1*10 (3.98%). Frequencies of NAT1*3, *4 (wild-type), *10 and *11 alleles were 3.73%, 69.6%, 17.66% and 7.2%, respectively. The frequency of NAT1*11 was the highest amongst the populations studied so far, the other allele frequencies being close to those described in Caucasian populations.
Tipo: Info:eu-repo/semantics/article Palavras-chave: NAT1 gene; Genetic polymorphism; Molecular epidemiology; Turkish population.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200005
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Epidemiologia molecular de Anaplasma marginale em bovinos criados nos Estados de Rondônia e Acre. Infoteca-e
BRITO, L. G.; OLIVEIRA, M. C. de S.; SILVA NETTO, F. G. da; CAVALCANTE, F. A.; MARIM, A. D.; SOUZA, G. C. R. de; SILVA, J. L. da; BENITEZ, F.; MOURA, M. M. da F..
Nesse trabalho determinou-se a prevalência de A. marginale em rebanhos bovinos criados em oito microrregiões de Rondônia e quatro microrregiões do Acre através da utilização da técnica da reação em cadeia da polimerase (PCR) utilizada para amplificação de um fragmento de 458 pb do gene msp5. Verificou-se uma taxa de prevalência de 98,6% nas amostras provenientes de Rondônia e de 92,87% nas amostras provenientes do Acre. As taxas de prevalência não diferiram significativamente entre as microrregiões analisadas caracterizando os estados de Rondônia e Acre como áreas de estabilidade enzoótica para A. marginale. Através da análise do alinhamento da região de menor variabilidade do gene msp1a, identificou-se a presença de cincos tipos de isolados dessa...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Epidemiologia molecular; Doença animal; Pecuária; Molecular epidemiology; Anaplasma marginale; Bovine; Rondônia; Acre.
Ano: 2007 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/709358
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Epidemiological studies in the information and genomics era: experience of the Clinical Genome of Cancer Project in São Paulo, Brazil BJMBR
Wünsch-Filho,V.; Eluf-Neto,J.; Lotufo,P.A.; da Silva Jr.,W.A.; Zago,M.A..
Genomics is expanding the horizons of epidemiology, providing a new dimension for classical epidemiological studies and inspiring the development of large-scale multicenter studies with the statistical power necessary for the assessment of gene-gene and gene-environment interactions in cancer etiology and prognosis. This paper describes the methodology of the Clinical Genome of Cancer Project in São Paulo, Brazil (CGCP), which includes patients with nine types of tumors and controls. Three major epidemiological designs were used to reach specific objectives: cross-sectional studies to examine gene expression, case-control studies to evaluate etiological factors, and follow-up studies to analyze genetic profiles in prognosis. The clinical groups included...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Multicenter studies; Large-scale studies; Molecular epidemiology; Data control quality; Cancer epidemiological studies.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000400016
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Extração de DNA a partir de coágulos sanguíneos bovinos. Infoteca-e
BRITO, L. G.; OLIVEIRA, M. C. de S.; MOURA, M. M. da F.; SILVA NETTO, F. G. da S.; CAVALCANTE, F. A.; MARIM, A. D.; SOUZA, G. C. R. de; SILVA, J. L. da.
Foi otimizada uma metodologia de extração de DNA genômico a partir de coágulo sanguíneo. Amostras de sangue com e sem anticoagulante EDTA para a obtenção dos coágulos sanguíneos foram coletadas em bovinos nos estados de Rondônia e Acre para pesquisa de Anaplasma marginale. Para a extração de DNA a partir do coágulo sanguíneo testaram-se dois tipos de tecido de nylon: no tratamento 1, o tecido utilizado apresentava diâmetro dos poros de 200 µm e no tratamento 2, tecido com poros de diâmetro de 1.200 µm. As amostras de sangue com anticoagulante representaram o tratamento 3, sendo este considerado como tratamento controle. Após a quebra mecânica, os coágulos sofreram centrifugação a 7.000 RPM por 15 minutos passando através das malhas dos tecidos utilizados...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Extração de DNA; Coágulo sanguíneo; Epidemiologia molecular; Doenças de bovinos; DNA extraction; Blood clot; Molecular epidemiology; Bovine diseases.
Ano: 2006 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/710703
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Factors associated with epidemic multiresistant Pseudomonas aeruginosa infections in a hospital with AIDS-predominant admissions BJID
Gomes,Marisa Zenaide Ribeiro; Oliveira,Raquel Vasconcellos C. de; Machado,Carolina Romero; Conceição,Magda de Souza da; Souza,Cristina Vieira de; Lourenço,Maria Cristina da Silva; Asensi,Marise Dutra.
INTRODUCTION: Infections caused by multiresistant Pseudomonas aeruginosa (MR-PA) have been associated with persistent infections and high mortality in acquired immunodeficiency syndrome (AIDS) patients. Therefore, understanding the predisposing factors for infection/colonization by this agent is critical for controlling outbreaks caused by MR-PA in settings with AIDS patients. OBJECTIVEAND METHODS: To analyze the presence of factors associated with the acquisition of an epidemic MR-PA strain in a hospital with AIDS-predominant admission. A case-control study was carried out in which cases and controls were gathered from a prospective cohort of all hospitalized patients in an infectious disease hospital during a five-year study period. RESULTS: Multivariate...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pseudomonas aeruginosa; Risk factors; Disease outbreaks; Molecular epidemiology; Acquired immunodeficiency syndrome.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702012000300001
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Genetic variability of hepatitis A virus isolates in Rio de Janeiro: implications for the vaccination of school children BJMBR
Villar,L.M.; Lampe,E.; Meyer,A.; Gaspar,A.M.C..
The epidemiology of hepatitis A virus (HAV) infection is shifting from high to intermediate endemicity in Brazil, resulting in increased numbers of susceptible individuals and a greater potential for the emergence of outbreaks. Universal vaccination against HAV has been recommended for children, but updated sero-epidemiological data are necessary to analyze the level of natural immunity and to identify candidates for preventive measures. In addition, more molecular studies are necessary to characterize the genotypes involved in HAV infections and outbreaks. Sera from 299 school children (5-15 years old) and 25 school staff members, collected during an outbreak of HAV at a rural public school in June 2000, were tested for IgM and total anti-HAV antibodies...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hepatitis A virus (HAV); PCR; Molecular epidemiology; Sero-epidemiology; Vaccination.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004001200003
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High incidence of oncogenic HPV genotypes found in women from Southern Brazil BJM
Entiauspe,Ludmila G; Silveira,Mariângela; Nunes,Emily M; Basgalupp,Suélen P; Stauffert,Dulce; Dellagostini,Odir A.; Collares,Tiago; Seixas,Fabiana K..
Oncogenic HPV genotypes are strongly associated with premalignant and malignant cervical lesion. The purpose was to determine human papillomavirus (HPV) prevalence and genotypes, and to estimate cervical cancer risk factor associations. Cervical samples were obtained from 251 women seeking gynecological care at the Pelotas School of Medicine Clinic. This is a cross-sectional study. HPV-DNA was amplified by nested-PCR using MY09/11 and GP5/6 primers, and the sequencing was used for genotyping. Sociodemographic and behavioral risk factors were obtained by closed questionnaire, and its relationship to HPV infection prevalence were analyzed. Statistical analyses were performed using SPSS 16.0 software, and differences were considered significant at p <...
Tipo: Info:eu-repo/semantics/article Palavras-chave: HPV; SDT; Molecular epidemiology; Cervical cancer.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000200043
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HIV-1 subtypes among intravenous drug users from two neighboring cities in São Paulo State, Brazil BJMBR
Rossini,M.A.A.; Diaz,R.S.; Caseiro,M.; Turcato,G.; Accetturi,C.A.; Sabino,E.C..
In order to assess the molecular epidemiology of HIV-1 in two neighboring cities located near the epicenter of the HIV-1 epidemics in Brazil (Santos and São Paulo), we investigated 83 HIV-1 strains obtained from samples collected in 1995 from intravenous drug users. The V3 through V5 region of the envelope of gp 120 was analyzed by heteroduplex mobility analysis. Of the 95 samples, 12 (12.6%) were PCR negative (6 samples from each group); low DNA concentration was the reason for non-amplification in half of these cases. Of the 42 typed cases from São Paulo, 34 (81%, 95% confidence limits 74.9 to 87.0%) were B and 8 (19%, 95% confidence limits 12.9 to 25.0%) were F, whereas of the 41 typed cases from Santos, 39 (95%, 95% confidence limits 91.6 to 98.4%)...
Tipo: Info:eu-repo/semantics/other Palavras-chave: HIV-1 subtypes; Intravenous drug users; Molecular epidemiology; Heteroduplex mobility analysis; Brazil.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000100005
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Human T cell lymphotropic virus type 1 infection among men who have sex with men in Central Brazil BJID
Castro,Lisie Souza; Rezende,Grazielli Rocha de; Fernandes,Fernanda Rodas Pires; Bandeira,Larissa Melo; Puga,Marco Antonio Moreira; Tanaka,Tayana Serpa Ortiz; Weis-Torres,Sabrina Moreira dos Santos; Vicente,Ana Carolina Paulo; Otsuki,Koko; Motta-Castro,Ana Rita Coimbra.
ABSTRACT Human T cell lymphotropic virus type 1 (HTLV-1) was the first retrovirus discovered in humans and is endemic in several parts of the world. Because of risk behaviors, mainly sexual, men who have sex with men (MSM) are at high risk of acquiring HTLV-1 infection. A cross-sectional study was performed to estimate the prevalence of HTLV-1 infection, to characterize genetically HTLV-1 sequences and to identify risk behaviors associated with this infection among MSM in Central Brazil. A total of 430 MSM were enrolled in this study and three were shown to be HTLV-1 infected, prevalence of 0.7% (95% confidence interval: 0.4-0.9). Phylogenetic analysis showed that all HTLV-1 positive samples belonged to Cosmopolitan subtype Transcontinental subgroup A....
Tipo: Info:eu-repo/semantics/article Palavras-chave: HTLV-1; Men who have sex with men; Sexual risk behavior; Molecular epidemiology; Brazil.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702018000600472
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Identificação e genotipagem de Mycobacterium bovis em bovinos positivos no teste intradérmico para tuberculose em Mato Grosso do Sul1. Repositório Alice
CAZOLA, D de O.; JORGE, K. dos S. G.; ZUMÁRRAGA, M. J.; SOUZA-FILHO, A. F.; ARAUJO, F. R.; OSÓRIO, A. L. A. R..
Neste estudo, realizou-se genotipagem de isolados de Mycobacterium bovis, provenientes de amostras de tecidos de bovinos positivos no teste cervical comparativo (TCC) para tuberculose em Mato Grosso do Sul, por meio da técnica de spoligotyping.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Mycobacterium bovis; Molecular identification; Molecular epidemiology; Poligotyping; Bovine tuberculosis.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1015208
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Lack of detection of human papillomavirus DNA in prostate carcinomas in patients from northeastern Brazil Genet. Mol. Biol.
Araujo-Neto,Ari P.; Ferreira-Fernandes,Hygor; Amaral,Carolina M.M.; Santos,Lina G.; Freitas,Antônio C.; Silva-Neto,Jacinto C.; Rey,Juan A.; Burbano,Rommel R.; Silva,Benedito B. da; Yoshioka,France K.N.; Pinto,Giovanny R..
Abstract Prostate cancer is the second most common cancer among men in western populations, and despite its high mortality, its etiology remains unknown. Inflammatory processes are related to the etiology of various types of tumors, and prostate inflammation, in particular, has been associated with prostate cancer carcinogenesis and progression. Human papillomavirus (HPV) is associated with benign and malignant lesions in the anogenital tract of both females and males. The possible role of HPV in prostate carcinogenesis is a subject of great controversy. In this study, we aimed to examine the prevalence of HPV infections in prostate carcinomas of patients from northeastern Brazil. This study included 104 tissue samples from primary prostate carcinoma...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Human papillomavirus; Prostate cancer; Prevalence; HPV PCR detection; Molecular epidemiology.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000100024
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Molecular diagnosis of Hepatozoon canis in symptomatic dogs in the city of Goiania, Goiás, Brazil Arq. Bras. Med. Vet. Zootec.
Duarte,S.C.; Parente,J.A.; Silveira Neto,O.J.; Jayme,V.S.; Bastos,T.S.A.; Linhares,G.F.C..
ABSTRACT More than 300 species have been described in the genus Hepatozoon, occurring in different vertebrates. Among these, only Hepatozoon canis and Hepatozoon americanum are seen in dogs. Different methods may be used for laboratory diagnosis. The most common of these is direct parasitological examination of parasite stages in blood smears. The aim of this investigation was to conduct a phylogenetic study on Hepatozoon isolates from symptomatic dogs in the city of Goiânia, Goiás, Brazil. Blood samples were obtained from 40 symptomatic dogs that had been referred to the Veterinary Hospital of the Federal University of Goiás. Among these, only two samples were positive for Hepatozoon spp. using the direct parasitological method. These samples were then...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canis familiaris; Hepatozoonosis; Molecular epidemiology; Phylogeny.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000601431
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Molecular epidemiology of type 1 and 2 dengue viruses in Brazil from 1988 to 2001 BJMBR
Pires Neto,R.J.; Lima,D.M.; de Paula,S.O.; Lima,C.M.; Rocco,I.M.; Fonseca,B.A.L..
Dengue is a mosquito-borne viral infection that in recent decades has become a major international public health concern. Epidemic dengue fever reemerged in Brazil in 1981. Since 1990 more than one dengue virus serotype has been circulating in this tropical country and increasing rates of dengue hemorrhagic fever and dengue shock syndrome have been detected every year. Some evidence supports the association between the introduction of a new serotype and/or genotype in a region and the appearance of dengue hemorrhagic fever. In order to study the evolutionary relationships and possible detection of the introduction of new dengue virus genotypes in Brazil in the last years, we analyzed partial nucleotide sequences of 52 Brazilian samples of both dengue type...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dengue virus; Nucleotide sequence; E/NS1 region; Molecular epidemiology; Dengue fever; Dengue hemorrhagic fever.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000600005
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