Avidity Assay
Mostrando 1-12 de 85 artigos, teses e dissertações.
-
1. First serologic evidence of human hantavirus infection in Alagoas State in Northeastern Brazil
Abstract INTRODUCTION: Hantavirus cardiopulmonary syndrome (HCPS) is rare in Northeastern Brazil. METHODS: Prospective surveillance was conducted over a two-year period in Alagoas State, Northeastern Brazil. The prevalence of anti-hantavirus N-antigen IgM and IgG in human serum samples was determined by enzyme-linked immunosorbent assay testing. RESULTS
Rev. Soc. Bras. Med. Trop.. Publicado em: 2017-12
-
2. Seroepidemiological analysis of toxoplasmosis in college students
Background Toxoplasmosis is a zoonosis caused by an obligate intracellular parasite, Toxoplasma gondii, which affects warm-blooded animals including humans. Its prevalence rates usually vary in different regions of the planet. Methods In this study, an analysis of the seroprevalence of toxoplasmosis among Brazilian students was proposed by means of IgG spec
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 03/03/2015
-
3. Comparison among the BED capture enzyme immunoassay test and AxSYM avidity index assay for determining recent HIV infection and incidence in two Voluntary Counselling and Testing Centres in Northeast Brazil
The aims of this study were to compare the automated AxSYM avidity assay index with the BED capture enzyme immunoassay test and to calculate the HIV-1 incidence using the BED capture enzyme immunoassay and AxSYM avidity assay index algorithms within a population seeking the Voluntary Counselling and Testing Centres in two municipalities in the Metropolitan R
Braz J Infect Dis. Publicado em: 2014-08
-
4. Prevalence and risk factors for Toxoplasma gondii infection among pregnant and postpartum women attended at public healthcare facilities in the City of Niterói, State of Rio de Janeiro, Brazil
IntroductionTo determine the prevalence of immunoglobulin G (IgG) and immunoglobulin M (IgM) anti-Toxoplasma gondii antibodies among pregnant and postpartum women attended within the public healthcare system in Niterói, State of Rio de Janeiro, and to detect possible exposure factors associated with T. gondii infection in this population.MethodsIgM and IgG
Rev. Soc. Bras. Med. Trop.. Publicado em: 02/04/2013
-
5. Detection of human herpesvirus 7 infection in young children presenting with exanthema subitum
In this study, we assessed the prevalence of human herpesvirus-7 (HHV-7) in 141 serum samples from children less than four years of age with exanthematic disease. All samples were negative for measles, rubella, dengue fever and parvovirus B19 infection. Testing for the presence of human herpesvirus-6 (HHV-6)-specific high avidity IgG antibodies by indirect i
Mem. Inst. Oswaldo Cruz. Publicado em: 2011-05
-
6. Ocorrência da infecção por Toxoplasma gondii e avaliação da imunização em caprinos do sertão do cabugi, Rio Grande do Norte
Toxoplasmosis is one zoonosis caused by Toxoplasma gondii protozoan. Goats, amongst the production animals, are one of the species most susceptible to this parasite, being one them main involved agents in ovine and goat abortions, determining great economic losses and implications for public health, since the presence it parasite in the products of goat orig
Publicado em: 2010
-
7. Anticorpos IgG total, IgG1 e IgG3 anti-VRS em crianças ≤5 anos de idade: ocorrência, nível e avidez
O vírus respiratório sincicial (VRS) é referido como o principal agente responsável por doença respiratória aguda (DRA) em recém-nascidos e lactentes, causando principalmente bronquiolite e pneumonia. Desde a década de 1960, aspectos da resposta imune contra esse vírus vêm sendo intensamente estudados, entretanto, características que podem levar �
Publicado em: 2010
-
8. Estudo longitudinal de marcadores sorológicos para o imunodiagnóstico da toxoplasmose aguda humana.
Toxoplasma gondii is thought to infect one third of the world population. Acute infection is often asymptomatic, but if acquired during pregnancy, T. gondii can be transmitted vertically, through the placenta, from mother to fetus, who is at high risk of developing severe disease. The commercially available serological tests have several limitations such as
Publicado em: 2009
-
9. Fatores associados á infecção por Toxoplasma gondii em gestantes atendidas nas unidades básicas de saúde do município de Rolândia, Paraná
The aim of this study was to determine the prevalence against IgG and IgM anti-Toxoplasma gondii antibodies in pregnant women attended in Health Basic Unities (UBS) in Rolândia city -Paraná-Brasil, and identify factors associated with infection by T. gondii. The prenatal screening program was implemented in the city in July 2007. 320 pregnant women were ev
Publicado em: 2009
-
10. Avidity of IgG for rubella: an evaluation of the need for implementation at the Materno-Infantil Presidente Vargas Hospital in Porto Alegre, Rio Grande do Sul, Brazil
Rubella serum assays performed in the laboratory of the Materno-Infantil Presidente Vargas Hospital (HMIPV) from 1998 to 2002 were reviewed to determine if IgG avidity assays should be implemented. IgG was determined using the Enzyme Linked Fluorescent Assay, ELFA, VIDAS® system, bioMérieux or the Microparticle Enzyme Immunoassay, MEIA, Axsym® system, Abb
Brazilian Journal of Infectious Diseases. Publicado em: 2004-06
-
11. Utilidade da determinação da avidez dos anticorpos IgG anti-citomegalovirus humano (HCMV) para o imunodiagnostico da citomegalovirose
The infection caused by human cytomegalovirus (HCMV) is generally asymptomatic or is associated with mild non-specific clinical symptoms in immunocompetent subjects. The virus can, however, cause serious illness in congenitally infected infants and in immunocompromised patients. The serological diagnosis of a recently acquired HCMV infection is usually based
Publicado em: 2003
-
12. Serotyping HIV-1 with V3 peptides: detection of high avidity antibodies presenting clade-specific reactivity
The main objective of the present study was to assess the specificity and sensitivity of a modified assay using short synthetic peptides of the V3 region of HIV-1 gp120, which is the main target for neutralizing antibodies. Results from an enzyme immunoassay (EIA) employing a panel of synthetic peptides of HIV-1 subtypes and using urea washes to detect high
Brazilian Journal of Medical and Biological Research. Publicado em: 2002-03