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| Registros recuperados: 191 | |
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| Teixeira,J.M.S.; Camara,G.N.N.L.; Pimentel,P.F.V.; Ferreira,M.N.R.; Ferreira,M.S.R.; Alfieri,A.A.; Gentsch,J.R.; Leite,J.P.G.. |
| Group C rotaviruses are fastidious in their in vitro cell culture requirements. Recent serosurveys indicate that antibody to group C rotavirus is present in 3-45% of the human population in certain geographic locations, suggesting that rotavirus group C infection is more prevalent than previously believed and that the low rate of detection of these agents is probably due to the lack of sensitive diagnostic assays. From March to December 1994, 406 fecal specimens were collected from children under five years of age who were outpatients at the emergency services of nine public hospitals in Brasília, Federal District, Brazil. In addition to the samples from children, one public outpatient unit requested virological investigation of a stool sample from an... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Group C rotavirus; Diarrhea; HIV; RT-PCR; Probe hybridization. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998001100005 |
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| Casseb,J.; Hong,M.A.; Gonsalez,C.; Brígido,L.F.; Duarte,A.J.S.; Michael-Hendry,R.. |
| HIV-1 variability may have an important impact on transmission and pathogenicity. Better characterization of the HIV epidemic in Brazil is necessary for the development of vaccine trials in this country. We analyzed sera from 108 HIV-1-infected volunteers from São Paulo City to determine serotype and reactivity for V3 motifs of HIV in this population, and the relationship to transmission mode. We concluded that the HIV-1 B serotype is frequent among heterosexually infected women, even in the absence of anal sex, and that two major V3 motifs, GPGR and GWGR, had similar prevalence among women (48% and 52%, respectively) and men (56% and 44%, respectively). We also observed an equal distribution of these strains regardless of their CD4+ T cell counts,... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: HIV; Serotyping; Gp 120 V3 loop; Synthetic peptides; Sexual transmission. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998001000002 |
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| Nogueira,Susie A.; Abreu,Thalita; Oliveira,Ricardo; Araújo,Lúcia; Costa,Tomaz; Andrade,Miriam; Psic,M. Fátima Garcia; Machado,Elizabeth; Rodrigues,Káris; Mercadante,Elizabeth Regina; Fernandes,Iraína; Sapia,M. Conceição; Lambert,John S.. |
| OBJECTIVES: To determine the HIV vertical transmission rate (VTR) and associated risk factors by use of zidovudine and infant care education in Brazil. METHODS: Since 1995, a prospective cohort of HIV infected pregnant women has been followed at the Federal University of Rio de Janeiro. A multidisciplinary team was established to implement the best available strategy to prevent maternal-infant HIV transmission. Patients with AIDS or low CD4 and high viral load received anti-retroviral drugs in addition to zidovudine. Children were considered infected if they had 2 positive PCR-RNA tests between 1 and 4 months of age, or were HIV antibody positive after 18 months. Education regarding infant treatment and use of formula instead of breast feeding was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; HIV; Prevention; Perinatal transmission; Zidovudine. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702001000200006 |
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| Oplustil,Carmen Paz; Leite,Olavo H.M.; Oliveira,Marilia S.; Sinto,Sumiko I.; Uip,David E.; Boulos,Marcos; Mendes,Caio F.. |
| This study was done to determine the occurrence of mycobacteria in the bloodstreams of patients with fever and advanced AIDS in a Brazilian hospital. We also verified the capability of an automated method for recovering these bacteria. During a period of 19 months, 254 patients with AIDS were evaluated. Blood cultures were generally submitted in pairs and drawn separately. Blood cultures were processed by the BACTEC 460TB System (Becton Dickinson Microbiology Systems, Sparks, MD), using the Bactec 13A media (Becton Dickinson Microbiology Systems, Sparks, MD). Of the 530 vials submitted, 77 (14.5%) from 41 (16%) patients were positive. Mycobacterium avium complex was recovered from 45 (58.4%) of the 77 positive vials, corresponding to 22 (53.6%) patients... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mycobacterial infection; HIV; Automated diagnosis; AIDS. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702001000500003 |
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| Treitinger,Arício; Spada,Celso; Silva,Laura Maria D. da; Hermes,Elizabeth Martins; Amaral,Jorge Antônio; Abdalla,Dulcineia Saes Parra. |
| Lipid and acute-phase protein alterations have been described in various infection diseases, and they have been recorded during the early stages of HIV infection. Lipid and acute-phase protein profiles also have been correlated with cellular immunological abnormalities. To document these correlations during HIV infection, we studied 75 HIV-infected patients and 26 HIV-negative controls. Patients were classified according to the criteria proposed by the Walter Reed Army Institute: as WR-1 (CD4 lymphocytes, 1154 ± 268/mm³), WR-2 (CD4, 793 ± 348/mm³) and WR3/4 (CD4, 287±75 mm³). Triglycerides, total cholesterol and HDL-cholesterol concentrations were measured by enzymatic methods. Immunoglobulins (IgA and IgG) and acute-phase proteins (haptoglobin, a1-acid... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: HIV; CD4+; Triglycerides; IgA; A1-acid glycoprotein; Haptoglobin. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702001000400005 |
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| Andrade Neto,José Luiz; Pintarelli,Vitor Last; Felchner,Paulo Cesar Zimmermann; Morais,Rodrigo Leite de; Nishimoto,Fabíola Lie. |
| There still is no cure for the acquired immunodeficiency syndrome (AIDS). Its etiologic agent is the human immunodeficiency virus (HIV), and transmission occurs through sexual relationships, contacts with blood, and vertically (mother to child). In this study, we sought to determine the prevalence of HIV among blood donors at a blood bank in Curitiba. We studied 213,666 blood donations made from March 1, 1992, to April 25, 1999. Each potential blood donor first answered a questionnaire, submitted to a clinical examination, and filled out a self-exclusion card. Blood was collected and analyzed only from the candidates approved by the first two criteria. Two tests were used to detect HIV: ELISA for screening, and Western-Blot for confirmation. The results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: AIDS; Blood donor; HIV. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702002000100003 |
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| Schultz, T. Paul. |
| Wage-differentials by education of men and women are examined from African household surveys to suggest private wage returns to schooling. It is commonly asserted that returns are highest at primary school levels and decrease at secondary and postsecondary levels, whereas private returns in six African countries are today highest at the secondary and post secondary levels, and rates are similar for women as for men. The large public subsidies for postsecondary education in Africa, therefore, are not needed to motivate students to enroll, and those who have in the past enrolled in these levels of education are disproportionately from the better-educated families. Higher education in Africa could be more efficient and more equitably distributed if the... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Africa; Wage returns to schooling; Inequality; HIV; AIDS; Labor and Human Capital; 015; 055; J31; J24. |
| Ano: 2003 |
URL: http://purl.umn.edu/28481 |
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| Blatt,Jucelene Marchi; Cantos,Geny Aparecida. |
| Human immunodeficiency virus (HIV) and intestinal parasites are common in Brazil. Previous studies have shown that infection with Strongyloides stercoralis is frequently associated with HIV infection. Strongyloidiasis is difficult to diagnosis and stool examination with conventional techniques fails to detect the helminth larvae. We made a prospective study, to test the efficacy of the agar plate technique to detect S. stercoralis in 211 HIV-positive patients and 213 HIV-negative patients in the city of Itajaí, Brazil, between September 2001 and June 2002. The feces samples of these patients were processed and analyzed according to the following methods: Lutz, formalin ethyl acetate, Baermann, Harada-Mori and agar plate culture. HIV-positive patients were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agar plate culture; HIV; Strongyloides stercoralis. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702003000600008 |
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| Brantley,Richard K.; Williams,K. Robert; Silva,Terezinha M.J.; Sistrom,Maria; Thielman,Nathan M.; Ward,Honorine; Lima,Aldo A. M.; Guerrant,Richard L.. |
| Advanced HIV infection is frequently complicated by diarrhea, disruption of bowel structure and function, and malnutrition. Resulting malabsorption of or pharmacokinetic changes in antiretroviral agents might lead to subtherapeutic drug dosing and treatment failure in individual patients, and could require dose adjustment and/or dietary supplements during periods of diarrheal illness. We determined the plasma levels of antiretroviral medications in patients that had already been started on medication by their physicians in an urban infectious diseases hospital in northeast Brazil. We also obtained blood samples from patients hospitalized for diarrhea or AIDS-associated wasting, and we found reduced stavudine and didanosine levels in comparison with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: HIV; Malabsorption; DdI; D4T; Pharmacokinetics. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702003000100003 |
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| Prati,Ronaldo Cristiano; Monard,Maria Carolina; Carvalho,André C. P. L. F. de. |
| The aim of data mining is to find useful knowledge inout of databases. In order to extract such knowledge, several methods can be used, among them machine learning (ML) algorithms. In this work we focus on ML algorithms that express the extracted knowledge in a symbolic form, such as rules. This representation may allow us to ''explain'' the data. Rule learning algorithms are mainly designed to induce classification rules that can predict new cases with high accuracy. However, these sorts of rules generally express common sense knowledge, resulting in many interesting and useful rules not being discovered. Furthermore, the domain independent biases, especially those related to the language used to express the induced knowledge, could induce rules that are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Data mining; Exceptions; HIV; Protease. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000400027 |
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| Registros recuperados: 191 | |
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