A Portable Fiberoptic Monitor for Fluorimetric Bioassays

1986 ◽  
Vol 40 (5) ◽  
pp. 696-700 ◽  
Author(s):  
T. Vo-Dinh ◽  
G. D. Griffin ◽  
K. R. Ambrose
Keyword(s):  
Immunosorbent Assay ◽  
Immunoglobulin G ◽  
Detection Method ◽  
Enzyme Linked Immunosorbent Assay ◽  
Enzyme Substrate ◽  
Rabbit Immunoglobulin ◽  
Conventional Elisa ◽  
Better Than

A simple and portable fiberoptic instrument for fluorimetric bioassays is described. The instrument is designed to be readily adaptable to commercially available biotesting wells on microplates. The microwells can also be used as interchangeable sensor heads. The utility of the fiberoptic biosensor is illustrated with a model enzyme-linked immunosorbent assay (ELISA) used to measure varying amounts of rabbit immunoglobulin G from 10 pg to 1 μg. The detection method utilizes an enzyme-amplified immunoassay of 4-methylumbelliferone phosphate as the enzyme substrate. The sensitivity of this assay is three orders of magnitude better than that obtained with a conventional ELISA absorption spectrometric assay using a commercially available reader.

scholarly journals Evaluation of the INOVA Diagnostics Enzyme-Linked Immunosorbent Assay Kits for Measuring Serum Immunoglobulin G (IgG) and IgA to Deamidated Gliadin Peptides

2006 ◽  
Vol 13 (1) ◽  
pp. 150-151 ◽  
Author(s):  
Harry E. Prince
Keyword(s):  
Celiac Disease ◽  
Immunosorbent Assay ◽  
Immunoglobulin G ◽  
Immunoglobulin A ◽  
Serum Immunoglobulin ◽  
Enzyme Linked Immunosorbent Assay ◽  
Gliadin Antibodies ◽  
Gliadin Peptides ◽  
Disease Specific ◽  
Inova Diagnostics

ABSTRACT New assays for antibodies to deamidated gliadin peptides (DGP) expressing celiac disease-specific epitopes were evaluated using 154 sera previously tested for endomysial immunoglobulin A (IgA) (EMA), transglutaminase IgA (TGA), and conventional gliadin antibodies. DGP antibody results showed 97% concordance with EMA and TGA results. Of 56 sera negative for EMA and TGA but positive for conventional gliadin antibodies, 54 (96%) were negative for DGP antibodies.

scholarly journals Analysis of Specific Immunoglobulin G Subclass Antibodies for Serological Diagnosis of Echinococcosis by a Standard Enzyme-Linked Immunosorbent Assay

1998 ◽  
Vol 5 (5) ◽  
pp. 613-616 ◽  
Author(s):  
Felix Grimm ◽  
Friedrich E. Maly ◽  
Jian Lü ◽  
Roberto Llano
Keyword(s):  
Healthy Volunteers ◽  
Immunosorbent Assay ◽  
Immunoglobulin G ◽  
Serological Diagnosis ◽  
Enzyme Linked Immunosorbent Assay ◽  
Parasitic Infections ◽  
Igg Subclass ◽  
Specific Antibodies ◽  
Specific Igg4 ◽  
Antibody Levels

ABSTRACT The potential roles of specific antibodies of the different immunoglobulin G (IgG) subclasses in the serological diagnosis of cystic echinococcosis (CE) and alveolar echinococcosis (AE) were investigated by an enzyme-linked immunosorbent assay based on hydatid fluid as antigen. Specific antibodies of subclass 1 were found to be of major importance. In sera collected at the time of diagnosis (i.e., before any therapeutic intervention was initiated) they could be demonstrated in 14 of 15 sera from patients with CE and in all 12 sera from patients with AE. The most discriminatory and the most specific antibodies found in this study belonged to IgG subclass 4. Only one false-positive reaction was observed with 253 sera from healthy volunteers, and no cross-reactions occurred in 80 sera from patients with different parasitic infections. Specific IgG4 antibodies could be demonstrated in 61.0 to 66.7% (CE) or 47.6 to 66.7% (AE) of the cases. Antibody levels of IgG subclass 2 were elevated only moderately, and subclass 3 antibodies were detected in a few cases only. In addition, nonspecific reactions in sera of healthy volunteers or patients with other parasitic infections could partially be attributed to antibodies of subclasses 2 and 3.

Enzyme-linked immunosorbent assay (ELISA) for immunoglobulin G antibodies against insect venoms

1981 ◽  
Vol 68 (2) ◽  
pp. 112-118 ◽  
Author(s):  
J.Andrew Grant ◽  
Randall M. Goldblum ◽  
Richard Rahr ◽  
David O. Thueson ◽  
Jafar Farnam ◽  
...  
Keyword(s):  
Immunosorbent Assay ◽  
Immunoglobulin G ◽  
Enzyme Linked Immunosorbent Assay

scholarly journals Levels of Airborne Soybean Allergen (Gly m 1) in a Brazilian Soybean Production City: A Pilot Study

2020 ◽  
Vol 17 (15) ◽  
pp. 5381
Author(s):  
Cinthya Covessi Thom de Souza ◽  
Nelson Augusto Rosário Filho ◽  
Juliana Francis de Camargo ◽  
Ricardo Henrique Moreton Godoi
Keyword(s):  
Pilot Study ◽  
Immunosorbent Assay ◽  
Detection Method ◽  
Enzyme Linked Immunosorbent Assay ◽  
Soybean Production ◽  
Soy Production ◽  
Assay Detection ◽  
Soybean Allergen

Asthma epidemics have been shown to be related to where soybeans are loaded and handled, but data are scarce in the literature. This pilot study evaluated the levels of Gly m 1 in dust samples collected in Maringá, Brazil, a city with high soy production and processing. A dust impactor was used to collect seven isolated samples during 2015 and 2016. Samples were analyzed by an ELISA (enzyme-linked immunosorbent assay) detection method. Gly m 1 was found in all samples, ranging from 0.82–24.38 ng/m3 (median 2.41), regardless of the month or year evaluated. The levels of Gly m 1 were considered low, but the concentrations required to cause sensitization and symptoms are uncertain.

scholarly journals Assignment of Additional Anticapsular Antibody Concentrations to the Neisseria meningitidis Group A, C, Y, and W-135 Meningococcal Standard Reference Serum CDC1992

2002 ◽  
Vol 9 (3) ◽  
pp. 725-726 ◽  
Author(s):  
Cheryl M. Elie ◽  
Patricia K. Holder ◽  
Sandra Romero-Steiner ◽  
George M. Carlone
Keyword(s):  
Quality Control ◽  
Disease Control ◽  
Neisseria Meningitidis ◽  
Immunosorbent Assay ◽  
Immunoglobulin G ◽  
Enzyme Linked Immunosorbent Assay ◽  
Control And Prevention ◽  
Group A ◽  
Reference Serum ◽  
Centers For Disease Control

ABSTRACT We assigned additional enzyme-linked immunosorbent assay antibody concentrations (immunoglobulin G [IgG], IgM, and IgA, and total) to the Neisseria meningitidis standard reference serum CDC1992 for groups Y and W-135 to 12 Centers for Disease Control and Prevention quality control sera. These assignments will supplement previous assignments and will aid in the evaluation of present and developing vaccines.

scholarly journals Immunoglobulin G enzyme-linked immunosorbent assay using truncated nucleoproteins of Reston Ebola virus

2003 ◽  
Vol 130 (3) ◽  
pp. 533-539 ◽  
Author(s):  
T. IKEGAMI ◽  
M. SAIJO ◽  
M. NIIKURA ◽  
M. E. MIRANDA ◽  
A. B. CALAOR ◽  
...  
Keyword(s):  
Amino Acid ◽  
Immunosorbent Assay ◽  
Specific Antibody ◽  
Immunoglobulin G ◽  
Ebola Virus ◽  
Enzyme Linked Immunosorbent Assay ◽  
Cynomolgus Macaques

We developed an immunoglobulin G (IgG) enzyme-linked immunosorbent assay (ELISA), using partial recombinant nucleoproteins (rNP) of Reston Ebola virus (EBO-R) and Zaire Ebola virus (EBO-Z). We examined the reaction of 10 sera from cynomolgus macaques naturally infected with EBO-R to each of the partial rNP in the IgG ELISA. All the sera reacted to the C-terminal halves of the rNP of both EBO-R and EBO-Z. Most of the sera reacted to the RΔC (amino acid (aa) 360–739), and RΔ6 (aa 451–551) and/or RΔ8 (aa 631–739) at a higher dilution than to the corresponding truncated rNPs of EBO-Z. The results indicate that this IgG ELISA is useful for detecting EBO-R specific antibody, and may have a potential to discriminate EBO-R infection from other subtypes.

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