Virus Antigens
Mostrando 1-12 de 2572 artigos, teses e dissertações.
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1. Serological and molecular investigation of Leishmania spp. infection in cats from an area endemic for canine and human leishmaniasis in Northeast Brazil
Resumo O objetivo do presente estudo foi investigar a ocorrência de anticorpos contra Leishmania spp., e sua associação com o vírus da imunodeficiência felina (FIV) e o vírus da leucemia felina (FeLV), em felinos domésticos provenientes de uma área endêmica no estado do Rio Grande do Norte, para a leishmaniose visceral canina e humana. Noventa e um
Rev. Bras. Parasitol. Vet.. Publicado em: 04/11/2019
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2. HLA-B*14 allele predicts HIV-1 mother-to-child-transmission, in Salvador, Brazil
ABSTRACT Background: Class I human leukocyte antigens, especially the molecules encoded at the B locus (HLA-B), are associated with AIDS progression risk. Different groups of HLA-B alleles have been associated to a protective effect or increasing susceptibility to HIV infection and are expressed from the earliest stages of gestation. Objective: The aim of
Braz J Infect Dis. Publicado em: 18/07/2019
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3. IgG1 and IgG4 antibodies against Core and NS3 antigens of hepatitis C virus
Abstract INTRODUCTION: IgG subclasses involved in the immune response to hepatitis C virus (HCV) antigens have been rarely studied. We investigated the immune response mediated by IgG1 and IgG4 antibodies against the recombinant core and NS3 antigens in patients with chronic hepatitis C. METHODS: Sixty patients infected with HCV genotype 1 without antivi
Rev. Soc. Bras. Med. Trop.. Publicado em: 07/03/2019
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4. Paper-Based Microfluidics Immunoassay for Detection of Canine Distemper Virus
ABSTRACT Paper-based devices present low-cost and are versatile, making them very attractive for clinical analysis. To manufacture those devices wax patterns are printed on paper surface and upon heating the wax permeates through the entire thickness of the paper, creating hydrophobic barriers that delimit test areas. Antibodies produced in rabbits against c
Braz. arch. biol. technol.. Publicado em: 08/01/2018
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5. Identification of hepatitis B virus A1762T/G1764A double mutant strain in patients in Southern Brazil
Abstract Infection by hepatitis B virus (HBV) is a worldwide public health problem. Chronic HBV infection with high viral replication may lead to cirrhosis and/or hepatocellular carcinoma. Mutant HBV strains, such as the HBV A1762T/G1764A double mutant, have been associated with poor prognosis and higher risk of the patient for developing cirrhosis and/or he
Braz J Infect Dis. Publicado em: 2017-10
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6. Development of a prototype immunochromatographic test for rapid diagnosis of respiratory adenovirus infection
Abstract Human adenoviruses comprise an important group of etiologic agents that are responsible for various diseases in adults and children, such as respiratory, ocular, gastroenteric, and urinary infections. In immunocompromised and organ-transplanted individuals, these agents can cause generalized infections. Rapid diagnostic methods for detecting these i
Braz J Infect Dis. Publicado em: 2017-10
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7. Preliminary multiplex microarray IgG immunoassay for the diagnosis of toxoplasmosis and rubella
BACKGROUND During pregnancy, toxoplasmosis and rubella can cause serious damage to the mother and the foetus through vertical transmission. Early diagnosis enables implementation of health measures aimed at preventing vertical transmission and minimising damage caused by these diseases. OBJECTIVE Here, we report the development of a multiplex assay for s
Mem. Inst. Oswaldo Cruz. Publicado em: 2017-06
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8. Decrease in Dengue virus-2 infection and reduction of cytokine/chemokine production by Uncaria guianensis in human hepatocyte cell line Huh-7
ABSTRACT BACKGROUND Dengue fever may present hemorrhages and cavitary effusions as result of exacerbated immune responses. We investigated hydro-alcoholic extracts from leaves (UGL) and bark (UGB) of the medicinal species Uncaria guinanensis with respect to antiviral effects in Dengue virus (DENV) infection and in immunological parameters associated with i
Mem. Inst. Oswaldo Cruz. Publicado em: 2017-06
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9. High prevalence of norovirus in children with sporadic acute gastroenteritis in Manaus, Amazon Region, northern Brazil
BACKGROUND Norovirus (NoV) is a major cause of acute gastroenteritis (AGE) worldwide, especially in children under five years. Studies involving the detection and molecular characterisation of NoV have been performed in Brazil, demonstrating its importance as an etiological agent of AGE. OBJECTIVES The objectives of this study were to investigate the fre
Mem. Inst. Oswaldo Cruz. Publicado em: 2017-06
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10. DETECTION OF HUMAN ANTI-ZIKA VIRUS IgG BY ELISA USING AN ANTIGEN FROM in vitro INFECTED VERO CELLS: PRELIMINARY RESULTS
SUMMARY Zika virus (ZKV) infection is a huge public health problem in Brazil because of the increased incidence of microcephaly in neonates from infected mothers. Detection of specific IgG antibodies in maternal serum samples constitutes an important approach for diagnosing ZKV infection and evaluating its relationship with neonatal microcephaly. However, as
Rev. Inst. Med. trop. S. Paulo. Publicado em: 08/12/2016
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11. Human platelets antigens influence the viral load of platelets after the interaction of the platelets with HCV and HIV in vitro
Abstract: INTRODUCTION: In this study, we evaluated hepatitis C virus (HCV) and human immunodeficiency virus (HIV) - platelet interactions in vitro as well as human platelets antigen (HPA) polymorphisms. METHODS: Platelets were obtained from 100 healthy HPA-genotyped volunteer donors and incubated with HIV or HCV. The viral load after in vitro exposure w
Rev. Soc. Bras. Med. Trop.. Publicado em: 2016-08
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12. Toxoplasmic encephalitis: role of Human Leucocyte Antigens/alleles associated with rapid progression to Acquired Immunodeficiency Syndrome
Abstract Background/aims The frequency of Human Leucocyte Antigens/alleles associated with rapid progression from Human Immunodeficiency Virus infection to Acquired Immunodeficiency Syndrome was evaluated in Brazilian patients with Acquired Immunodeficiency Syndrome with and without Toxoplasmic Encephalitis. Methods 114 patients with Acquired Immunodeficie
Braz J Infect Dis. Publicado em: 2016-04