This study aimed to evaluate the use of protein A-peroxidase (horseradish peroxidase [HRPO]) in indirect enzyme-linked immunosorbent assays (iELISAs) and IgG avidity assays for serological distinction between Brucella abortus S19-vaccinated and -infected cows. Four groups were analyzed: GI, 41 nonvaccinated seropositive cows; GII, 79 S19-vaccinated heifers analyzed at 3 months postvaccination; ...

BACKGROUND Human cytomegalovirus (CMV) represents one of the leading causes of congenital infections worldwide. Early diagnosis of fetal infection and consequent rapid therapeutic intervention with immunoglobulin treatment may prevent fetal transmission and virus-related sequelae. In this study, the cell-mediated immunity and immunoglobulin avidity were evaluated as potential predictors of cong...

1 This study aimed to evaluate the use of Protein A-peroxidase (HRPO) in indirect ELISA 2 (iELISA) and IgG avidity assays for serological distinction between Brucella abortus S193 vaccinated and infected cows. Four groups were analyzed: (GI) 41 non-vaccinated seropositive 4 cows; (GII) 79 S19-vaccinated heifers analyzed at 3 months post-vaccination; (GIII) 105 S195 vaccinated cows analyzed afte...

nfection brought about by Toxoplasma gondii (T. gondii), toxoplasmosis, is transmitted to the fetus via the placenta. Infection may progress in the expectant mother totally asymptomatically. However, such infections are particularly significant because of undesired consequences for the fetus. Immunoglobulin G (IgG) avidity tests, which have come into use in recent years, make it possible to dis...

The ability to discriminate between primary Toxoplasma gondii infection acquired in early pregnancy and infection that occurred prior to pregnancy was assessed by an enzyme immunoassay (EIA) to determine the avidity of toxoplasma-specific immunoglobulin G (IgG). The results were compared to those of the Platelia Toxo-IgM EIA and the dye test. The mean IgG avidity of 73 serum samples collected w...

In 2013, national serosurveillance detected a high seroprevalence of antibodies to pertussis toxin (PT) from Bordetella pertussis among Japanese adults. Thus, we aimed to determine the cause(s) of this high seroprevalence, and analyzed the titers of antibodies to PT and filamentous hemagglutinin (FHA) among adults (35-44 years old), young children (4-7 years old), and older children (10-14 year...

Prompt and accurate laboratory testing of women before or during antenatal days is necessary for detecting humoral immunological responses against cytomegalovirus (CMV) infection and assessing risk of congenital transmission. CMV is the most common viral etiology with the greatest propensity to induce neonatal pathologies. Most healthcare facilities in developing countries rely solely on anti-C...

BACKGROUND The diagnosis of CMV infection is challenging and the quality of serological laboratory testing is critical, especially in pregnancy and in the determination of transplant recipients and donors serostatus. OBJECTIVES Evaluate the performances of the new LIAISON(®) CMV II line: LIAISON(®) CMV IgG II, LIAISON(®) CMV IgM II and LIAISON(®) CMV IgG Avidity II in comparison with the rout...

We compared the performances of five commercial rubella virus immunoglobulin G (IgG) avidity assays. The Adaltis (kappa = 0.28) and Diesse (kappa = 0.33) assays showed poor correlation, the Behring assay (kappa = 0.68) showed good correlation, and the Euroimmun (kappa = 0.95) and Radim (kappa = 0.94) assays showed excellent correlation with a well-established in-house rubella virus IgG avidity ...