Iga Antibodies Or Immunoglobulin A
Mostrando 1-12 de 441 artigos, teses e dissertações.
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1. ELISA-based assay of immunoglobulin G antibodies against mammalian cell entry 1A (Mce1A) protein: a novel diagnostic approach for leprosy
BACKGROUND Leprosy is a chronic infectious disease caused by the obligate intracellular bacillus Mycobacterium leprae. Because leprosy diagnosis is complex and requires professional expertise, new tools and methodologies are needed to detect cases in early stages and prevent transmission. The M. leprae genome contains mce1A, which encodes a putative mammali
Mem. Inst. Oswaldo Cruz. Publicado em: 2017-12
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2. Transferência de anticorpos reativos com intiminas α, β, γ de Escherichia coli pela placenta e aleitamento materno: determinação quantitativa em soros de recém-nascidos e soros e colostros de suas mães / Transference of antibodies reactive with intimins α, β and γ of Escherichia coli by placenta and breastfeeding: quantitative determination in the sera of newborns and the colostrum and sera of their mothers
Intimina é uma adesina de natureza protéica das bactérias diarreiogênicas Escherichia coli enteropatogenica (EPEC) e enterohemorrágica (EHEC), capazes de induzir a lesão \ attaching e effacing\ em enterócitos. Os principais subtipos de intiminas de EPEC e EHEC prevalentes no Brasil são α, β e γ. Nosso objetivo foi investigar a transfer
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/04/2010
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3. Reação imunoenzimática (ELISA) para detecção de imunoglobulina M, imunoglobulina G e imunoglobulina A contra a proteína rHsp-X (Rv 2031c)de Mycobacterium tuberculosis em pacientes com tuberculose pleural / Linked immunosorbent assay (ELISA) for detection of immunoglobulin M, immunoglobulin G and immunoglobulin A against the protein rHsp-X (Rv2031c) of Mycobacterium tuberculosis in patients with pleural tuberculosis
Pleural tuberculosis (TBP) has often spontaneous resolution, even without treatment. However, the lack of proper diagnosis and treatment can lead to the occurrence of pulmonary and/or extra-pulmonary tuberculosis in 65% of the cases, in the five years subsequent. The objective of this study was to evaluate the effectiveness of the recombinant Hsp-X antigen (
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/12/2009
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4. DinÃmica da IgA secretora especÃfica na lÃgrima empacientes portadores de uveÃte posterior ativa presumivelmente por Toxoplasma gondii durante o primeiro trimestre da doenÃa
Toxoplasma gondii (T.gondii) is the main cause of posterior uveitis and toxoplasmic retinochoroiditis is considered the most common infection of the retina. Serological tests are important tools for the diagnosis of toxoplasmosis, but in ocular toxoplasmosis, usually there is no correlation between levels of serum antibodies and eye symptoms in the patient.
Publicado em: 2009
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5. Avaliação dos níveis séricos de anticorpos IgG e subclasses e IgA, reativos a Porphyromonas gingivalis em indivíduos com periodontites crônica e agressiva.
Periodontitis is an inflammatory oral disease caused by multifactorial intrinsic and extrinsic agents including Gram-negative bacteria, like Porphyromonas gingivalis. This study was undertaken to evaluate immunoglobulin A, Immunoglobulin G and immunoglobulin G isotype serum antibodies against Porphyromonas gingivalis ATCC33277. This study included 89 patient
Publicado em: 2005
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6. Expressão dos receptores FC de imunoglobulina A em fagócitos do sangue de pacientes com bacteremia. / Expression of immunoglobulin a FC receptors on blood phagocytes of patients with gram-negative bacteremia.
The expression and function of FcaRI (CD89) were analyzed on blood monocytes and neutrophils of patients with gram-positive and gram-negative bacteremia. Eighteen patients with gram-positive bacteremia, sixteen patients with gram-negative bacteremia and twenty healthy individuals were studied. CD89 expression were analyzed by flow cytometry using specific st
Publicado em: 2001
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7. Isolation of Porcine Immunoglobulins and Determination of the Immunoglobulin Classes of Transmissible Gastroenteritis Viral Antibodies 1
The porcine immunoglobulins M (IgM), A (IgA), and G (IgG) were isolated and purified and some of the properties of the porcine milk IgA were examined. Monospecific antisera which were prepared against these immunoglobulins in rabbits were then used to absorb a particular class of immunoglobulin from sow serum, colostrum, and milk in an attempt to identify th
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8. Intracellular neutralization of virus by immunoglobulin A antibodies.
IgA is thought to neutralize viruses at the epithelial surface of mucous membranes by preventing their attachment. Since IgA, a polymeric immunoglobulin, is transported through the lining of epithelial cells by the polymeric-immunoglobulin receptor and since viruses are obligate intracellular parasites, we hypothesized that IgA antibodies may also interfere
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9. Detection of anti-toxoplasma immunoglobulin A antibodies by Platelia-Toxo IgA directed against P30 and by IMx Toxo IgA for diagnosis of acquired and congenital toxoplasmosis.
Platelia-Toxo IgA and IMx Toxo IgA assays were used with 260 serum samples, of which 93 were from seroconverted patients, 58 were from 21 congenitally infected children, and 109 were from uninfected patients, to detect anti-P30 immunoglobulin A antibodies. Because of its enhanced sensitivity, Platelia-Toxo IgA is more efficient in diagnosing acute or congeni
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10. Immunoglobulin G (IgG) and IgA subclass pattern of human antibodies to Shigella flexneri and Salmonella serogroup B and D lipopolysaccharide O antigens.
The subclass distribution of human serum antibodies to the O-antigenic lipopolysaccharides of Salmonella serogroups B and D and to Shigella flexneri serotypes 1b, 2a, and 4a lipopolysaccharide antigens were analyzed in an enzyme-linked immunosorbent assay with monoclonal antibodies to the immunoglobulin subclasses. The patients had culture-verified Salmonell
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11. Immunoglobulin A-mediated hepatobiliary transport constitutes a natural pathway for disposing of bacterial antigens.
The possibility that hepatobiliary transport of immunoglobulin A (IgA) immune complexes might eliminate bacterial antigens was investigated in mice with pneumococcal type III capsular polysaccharide and C carbohydrate and corresponding monoclonal antibodies. Although all isotypes of antibody caused uptake by the liver, only IgA, but not IgG or IgM, antibodie
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12. Immunoglobulin Classes and Biological Functions of Campylobacter (Vibrio) fetus Antibodies in Serum and Cervicovaginal Mucus
Serum and cervicovaginal mucus (CVM) antibodies from heifers after genital infection or systemic immunization with Campylobacter (Vibrio) fetus were classified according to their immunoglobulin class, antigenic specificities, and biological functions. Only immunoglobulin (Ig) A antibodies, specific both for O and superficial, heat-labile, whole-cell (W) anti