Dear Editor, The recent report by Kamel et al. [1] on primary cytomegalovirus infection in pregnant women is very interesting. The authors noted that ‘women who were IgM positive had no primary CMV infection in the index pregnancy as evidenced by the high CMV IgG avidity testing’ [1] . In fact, the usefulness of the IgG avidity test was previously reported by Seo et al. [2] , who noted that thi...

background: toxoplasmosis is well known as an important infection in pregnant women. although many serologic methods are available, diagnosis of early toxoplasmosis may be extremely difficult. objective: to detect the toxoplasma igg antibodies developed at the early stage of infection in pregnant women. methods: 225 pregnant women, who were in the 2nd to 4th month of their pregnancy, enrolled i...

Introduction: Fluorodeoxyglucose (FDG)-PET/CT is the standard imaging modality to assess initial tumor burden and response therapy in lymphoma. FDG-avidity EMZL remains unclear with variability by extranodal locations. Thus, current Lugano staging suggested use CT scans EMZL. Recent data challenging this suggestion. we evaluated using a large MZL database. Methods: We assessed University of Mia...

Conventional serum antibody titer, which expresses level, does not provide antigen binding avidity of the variable region antibody, is essential for defense response to infection. Here, we quantified anti-SARS-CoV-2 receptor-binding domain (RBD) by competitive binding-inhibition activity (IC50) between SARS-CoV-2 S1 immobilized on DCP microarray and various RBD doses added expressed as 1/IC50 n...

BACKGROUND AND OBJECTIVES We evaluated hepatitis B virus (HBV) serological markers by novel, quantitative immunoassays in order to study their behaviours and possible role in the various phases of HBV infection. STUDY DESIGN The quantitative determination of HBsAg and anti-HBc/IgM by chemiluminescent immunoassays (Abbott Architect) and the calculation of anti-HBc avidity index have been carri...

Avidity of immunoglobulin G (IgG) is defined as its binding strength to target antigen. As a consequence affinity maturation the IgG response, avidity maturing well. Therefore, acute infections are characterized by low-avidity IgG, whereas past usually associated with high-avidity IgG. also observed optimal vaccination. has been shown play significant role in protective humoral immunity many mi...

To determine HIV prevalence and place of exposure for illegal migrants in Italy, we tested 3,003 illegal adult migrants for HIV; 29 (0.97%) were HIV positive. Antibody avidity index results (indicators of time of infection) were available for 27 of those persons and showed that 6 (22.2%) presumably acquired their infection after migration.

A human herpesvirus 7 (HHV-7) indirect immunofluorescence antibody avidity test was developed and used with an existing human herpesvirus 6 (HHV-6) antibody avidity test to detect and distinguish low-avidity antibodies to HHV-6 and HHV-7 and hence the respective primary infections. With sera from 269 British children aged 0 to 179 weeks, the tests showed that most (10 of 98 serum samples [13%])...

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; ...