scholarly journals Identification and Expression of a 50-Kilodalton Surface Antigen of Babesia gibsoni and Evaluation of Its Diagnostic Potential in an Enzyme-Linked Immunosorbent Assay

2001 ◽  
Vol 39 (7) ◽  
pp. 2603-2609 ◽  
Author(s):  
S. Fukumoto ◽  
X. Xuan ◽  
Y. Nishikawa ◽  
N. Inoue ◽  
I. Igarashi ◽  
...  
Keyword(s):  
Immunosorbent Assay ◽  
Surface Antigen ◽  
Enzyme Linked Immunosorbent Assay ◽  
Babesia Gibsoni ◽  
Diagnostic Potential

scholarly journals Development of an Enzyme-Linked Immunosorbent Assay for the Detection of Antibody to Epizootic Hemorrhagic Disease of Deer Virus

2000 ◽  
Vol 12 (2) ◽  
pp. 142-145 ◽  
Author(s):  
James O. Mecham ◽  
Michael M. Jochim
Keyword(s):  
Immunosorbent Assay ◽  
Enzyme Linked Immunosorbent Assay ◽  
Hemorrhagic Disease ◽  
Structural Protein ◽  
Serum Samples ◽  
Epizootic Hemorrhagic Disease ◽  
Diagnostic Potential ◽  
The Us ◽  
Serotype 1 ◽  
Infected Cells

An enzyme-linked immunosorbent assay has been developed to detect antibodies to epizootic hemorrhagic disease of deer virus (EHDV). The assay incorporates a monoclonal antibody to EHDV serotype 2 (EHDV-2) that demonstrates specificity for the viral structural protein, VP7. The assay was evaluated with sequential sera collected from cattle experimentally infected with EHDV serotype 1 (EHDV-1) and EHDV-2, as well as the four serotypes of bluetongue virus (BTV), BTV-10, BTV-11, BTV-13, and BTV-17, that currently circulate in the US. A competitive and a blocking format as well as the use of antigen produced from both EHDV-1-and EHDV-2-infected cells were evaluated. The assay was able to detect specific antibody as early as 7 days after infection and could differentiate animals experimentally infected with EHDV from those experimentally infected with BTV. The diagnostic potential of this assay was demonstrated with field-collected serum samples from cattle, deer, and buffalo.

Babesia gibsoni: Serodiagnosis of infection in dogs by an enzyme-linked immunosorbent assay with recombinant BgTRAP

2008 ◽  
Vol 118 (4) ◽  
pp. 555-560 ◽  
Author(s):  
Youn-Kyoung Goo ◽  
Honglin Jia ◽  
G. Oluga Aboge ◽  
M. Alaa Terkawi ◽  
Ken Kuriki ◽  
...  
Keyword(s):  
Immunosorbent Assay ◽  
Enzyme Linked Immunosorbent Assay ◽  
Babesia Gibsoni

Evaluation of immunoglobulin G4 subclass antibody in a peptide-based enzyme-linked immunosorbent assay for the serodiagnosis of human fascioliasis

Parasitology ◽  
2007 ◽  
Vol 134 (14) ◽  
pp. 2021-2026 ◽  
Author(s):  
C. TANTRAWATPAN ◽  
W. MALEEWONG ◽  
C. WONGKHAM ◽  
S. WONGKHAM ◽  
P. M. INTAPAN ◽  
...  
Keyword(s):  
Immunosorbent Assay ◽  
Large Scale ◽  
Laboratory Diagnosis ◽  
Enzyme Linked Immunosorbent Assay ◽  
Parasitic Infections ◽  
Immunoglobulin G4 ◽  
Predictive Values ◽  
Diagnostic Potential ◽  
Human Fascioliasis ◽  
Specific Igg4

SUMMARYTo improve the diagnosis of human fascioliasis caused byFasciola gigantica, we developed a peptide-based enzyme-linked immunosorbent assay (peptide-based ELISA) based on the detection of specific IgG4 subclass antibody. Two identified B-cell epitopes ofF. giganticacathepsin L1 were synthesized as single synthetic peptides, acetyl-DKIDWRESGYVTELKDQGNC-carboxamide (peptide L) and acetyl-DKIDWRESGYVTEVKDQGNC-carboxamide (peptide V), and their diagnostic potential was evaluated. The sera of 25 patients infected withF. gigantica, 212 patients with other parasitic infections, 32 cholangiocarcinoma patients and 57 healthy controls were analysed. The sensitivity, specificity, accuracy, and positive and negative predictive values of this assay were the same with both peptides at 100%, 99·7%, 99·7%, 96·2% and 100%, respectively. These highly sensitive and specific peptide-based ELISAs for the detection of specific IgG4 antibody could be useful for laboratory diagnosis of human fascioliasis in future large-scale surveys throughout Southeast Asia where this disease is prevalent.

scholarly journals Development and Technical and Clinical Validation of a Quantitative Enzyme-Linked Immunosorbent Assay for the Detection of Human Antibodies to Hepatitis B Surface Antigen in Recipients of Recombinant Hepatitis B Virus Vaccine

2009 ◽  
Vol 16 (8) ◽  
pp. 1236-1246 ◽  
Author(s):  
Pierre Cambron ◽  
Jeanne-Marie Jacquet ◽  
Bernard Hoet ◽  
Marc Lievens
Keyword(s):  
Hepatitis B Virus ◽  
Hepatitis B ◽  
Immunosorbent Assay ◽  
Surface Antigen ◽  
Hepatitis B Surface Antigen ◽  
Geometric Mean ◽  
Enzyme Linked Immunosorbent Assay ◽  
Analytical Sensitivity ◽  
Limit Of Quantitation ◽  
B Virus

ABSTRACT Pending removal from the market of a commercial assay (the AUSAB [Abbott Laboratories] enzyme immunoassay [EIA]) for the determination of antibodies to hepatitis B surface antigen (HBsAg), a new in-house quantitative enzyme-linked immunosorbent assay (ELISA) to measure antibodies against HBsAg (anti-HBs) was developed (anti-HBs in-house). Specific anti-HBs antibodies were sandwiched between the precoated HBsAg ad and ay subtypes purified from plasma from hepatitis B virus (HBV) human carriers and the recombinant HBsAg adw2 subtype tagged with horseradish peroxidase. The assay was calibrated against the 1st International Reference Preparation for anti-hepatitis B immunoglobulin (lot 1977-W1042). Analytical sensitivity and the limit of quantitation were estimated at 0.43 mIU/ml and 2.0 mIU/ml, respectively. Overall reproducibility was 11.86%, and accuracy was estimated to be 94.89%. More than 4,000 samples from seven clinical trials were tested with the anti-HBs in-house assay and compared to results generated with AUSAB EIA and AUSAB radioimmunoassay (RIA). During the technical validation, the anti-HBs in-house assay was compared to the AUSAB RIA as a reference (n = 919). Overall assessment of concordance and Deming's regression analysis were performed. The coefficient of correlation between the AUSAB RIA and anti-HBs in-house assay was 0.9815 with a slope of 0.9187. The overall agreement between anti-HBs in-house and AUSAB RIA was 97.61%, considering the clinical cutoffs at 3.3 mIU/ml and 1.0 mIU/ml for the respective assays. From a clinical perspective, seroprotection rates and anti-HBs geometric mean antibody concentrations for individual studies calculated with either the in-house assay or the reference assays were similar. Conclusions of individual studies were confirmed. The performance characteristics of the in-house assay are acceptable. There is no evidence that use of the new assay would lead to different clinical conclusions from the reference method.

scholarly journals Serodiagnosis of Babesia gibsoni Infection in Dogs by an Improved Enzyme-Linked Immunosorbent Assay with Recombinant Truncated P50

2004 ◽  
Vol 66 (12) ◽  
pp. 1517-1521 ◽  
Author(s):  
Rodolfo A. VERDIDA ◽  
Olgga A. HARA ◽  
Xuenan XUAN ◽  
Shinya FUKUMOTO ◽  
Ikuo IGARASHI ◽  
...  
Keyword(s):  
Immunosorbent Assay ◽  
Enzyme Linked Immunosorbent Assay ◽  
Babesia Gibsoni

scholarly journals Molecular Cloning of a Babesia caballi Gene Encoding the 134-Kilodalton Protein and Evaluation of Its Diagnostic Potential in an Enzyme-Linked Immunosorbent Assay

2004 ◽  
Vol 11 (1) ◽  
pp. 211-215 ◽  
Author(s):  
Yoh Tamaki ◽  
Haruyuki Hirata ◽  
Noriyuki Takabatake ◽  
Sabine Bork ◽  
Naoaki Yokoyama ◽  
...  
Keyword(s):  
Molecular Cloning ◽  
Immunosorbent Assay ◽  
Horse Serum ◽  
Enzyme Linked Immunosorbent Assay ◽  
Gene Encoding ◽  
Infected Horse ◽  
Babesia Caballi ◽  
Babesia Equi ◽  
Diagnostic Potential ◽  
Control Horse

ABSTRACT A Babesia caballi gene encoding the 134-kDa (BC134) protein was immunoscreened with B. caballi-infected horse serum. An enzyme-linked immunosorbent assay (ELISA) using recombinant BC134 protein could effectively differentiate B. caballi-infected horse sera from Babesia equi-infected or noninfected control horse sera. These results suggest that the recombinant BC134 protein is a potential diagnostic antigen in the detection of B. caballi infection.

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