INTRODUCTION We wanted to assess the importance of the levels of anti-citrullinated peptide antibody (anti-CCP) and immunoglobulin M (IgM) rheumatoid factor (RF) in predicting development of persistent arthritis from undifferentiated arthritis (UA), and to investigate whether there is an added predictive value for persistent arthritis in testing for both anti-CCP and IgM RF. METHODS Patients ...

Antiphospholipid antibodies, including anticardiolipin antibodies, are frequently detected in sera from patients with systemic lupus erythematosus (1). Numerous reports have associated these autoantibodies with various venous and arterial thrombotic disorders, including cerebral infarction (2), deep venous thrombosis (3), thrombocytopenia (1), pulmonary embolism (4), and recurrent fetal loss wi...

A sensitive method for detecting rubella IgM antibody, the first step of which is the attachment of the serum IgM to a solid phase, is described. Specific IgM antibody was found in all 52 people with acquired rubella in the early convalescent period, in all 38 infants with congenital rubella examined in the first seven months of life, and in 23 of 26 people immunised one to four months before t...

Co-endemicity of SARS-CoV-2 and dengue virus (DV) infection is becoming a matter serious concern as it has been already reported that antibodies (Ab) elicited by can produce false-positive results in IgG IgM rapid tests vice versa . Here we communicate five thirteen DV antibody-positive serum samples from Kolkata, archived 2017 (predating the COVID-19 outbreak), produced IgG/IgM lateral flow-ba...

Background and Aims: Cytomegalovirus (CMV) has worldwide distribution, and its prevalence rate depends on factors such as economic and geographical conditions. An important way of the virus transmission is via blood. Due to high prevalence of anti-CMV antibodies in blood donors and lack of data concerning its seroprevalence in the region, this study was carried out to determine the prevalence r...

To investigate the significance of the SARS-associated coronavirus (SARS-CoV) antibody, detected by ELISA and indirect immunofluorescence assays (IFA) for the SARS-CoV Vero E6 cell lysates, in non-SARS subjects, 114 serum samples from healthy controls and 104 serum specimens from autoimmune disease patients were collected. The results of ELISA showed that among 114 sera from healthy controls, 4...

The IgG and IgM specific antibodies against a panel of 23 anaerobic gut bacteria were examined in Crohn's disease, ulcerative colitis, and healthy controls. Four of the organisms, Bifidobacterium bifidum, Coprococcus comes (ME46), Coprococcus comes (Sp4), and Eubacterium limosum gave abnormal antibody titres in Crohn's disease compared with those of controls. In Crohn's disease specific IgG ant...

We investigated the ability of IgM-, IgD-, and IgG-bearing cells from the spleens of (BALB/c x C57BL/Ka)F1 mice primed to dinitrophenyl-bovine serum albumin (DNP-BSA) to restore the adoptive secondary anti-BSA and anti-DNP antibody responses. A rabbit anti-mouse IgD antiserum was prepared and the specificity documented by radioimmunoprecipitation, and cell surface staining. Purified populations...

To evaluate the usefulness of different commercial enzyme linked immunosorbent assays (ELISAs) for the detection of IgM antibodies against Toxoplasma gondii the results of six of these assays for a panel of 81 sera were compared. The following tests were selected: Toxoplasma gondii IgM ELISA (Clark Laboratories), Toxoplasma IgM EIA (Labsystems), Toxo-M EIA (Abbott), Toxonostika M (Organon), Tox...

Abstract Despite ongoing efforts to characterize the host response toward SARS-CoV-2, a major gap in our knowledge still exists regarding magnitude and duration of humoral response. Analysis antibody mild versus moderate/severe patients, using new developed quantitative electrochemiluminescent assay for detecting IgM/IgA/IgG antibodies SARS-CoV-2 antigens, revealed rapid onset IgG/IgA antibodie...