Serum immunoglobulin G (IgG) and IgM were measured for individual Salmonella species by the enzyme-linked immunosorbent assay (ELISA). F344 rats were experimentally infected with Salmonella typhimurium (serogroup B), S. enteritidis (serogroup D), and S. rubislaw (serogroup G.) Endotoxin extracted from each serogroup served as the antigen in a classical indirect ELISA. Antibody specific for each...

UNLABELLED Brucellosis is a worldwide zoonosis with a high degree of morbidity in humans. In Bosnia and Herzegovina a progressive increase of brucellosis among humans is evident. As the clinical picture of human brucellosis is fairly non-specific, a definitive diagnosis requires isolation of the causative organism, or the demonstration of the high levels of specific antibodies, or seroconversio...

An ELISA method was developed for the measurement of toxoplasma IgG antibodies in human serum using antigen-coated polystyrene beads as a solid phase and anti human IgG-horse radish peroxidase conjugate as an enzymatic tracer. In order to assess ELISA sensitivity and specificity, a between methods comparison was made using 'conventional' serological tests as reference (dye-test, crossover-linke...

The precise diagnosis of the acute toxoplasmosis in pregnant women and immunocompromsied patients has critical importance. Most of the commercially available assays use the whole Toxoplasma soluble extract as the antigen. However, the assays currently available for the detection of specific anti-Toxoplasma antibodies may vary in their abilities to detect serum immunoglobulins, due to the lack o...

INTRODUCTION Typhoid fever is endemic in many parts of the world and represents a major cause of acute febrile illness (AFI). Rapid and accurate laboratory methods for diagnosis of this disease are needed for both patient care and surveillance situations. METHODOLOGY Serum samples were collected from AFI patients and used to evaluate the performance of a newly developed ELISA assay that uses ...

BACKGROUND AND OBJECTIVES Timely diagnosis of leptospirosis is essential for an effective treatment. Large diversity of clinical symptoms has led leptospirosis diagnosis difficult. Researchers have conducted many tests with wide-range of sensitivity and specificity to achieve novel diagnostic procedures which have higher sensitivity and specificity compared with previous tests and which are mor...

Epstein-Barr virus (EBV), a human herpesvirus, affects up to 95% of adults. Diagnosis of acute EBV infection can be challenging and often relies on the serologic antibody pattern to 3 distinct antigens, most often determined by indirect fluorescent antibody (IFA), enzyme-linked immunosorbent assays (ELISAs), and, more recently, multiplex assays. We compared a multiplex assay for the simultaneou...

Identification of acid-fast bacilli (AFB) in sputum or tissue samples is among definite diagnostic methods of tuberculosis. However, this method of diagnosis is restricted by certain limitations. Serologic diagnosis of tuberculosis (TB) has been used for a long time. The aim of this study was to determine the sensitivity and, specificity of Antigen 60 (A60) IgG, IgA, IgM test results in TB diag...

In this work, we obtain a producer of the recombinant SARS-CoV-2 E protein and develop system for its expression purification in soluble form. ELISA confirmed antigenic properties. COVID-19 convalescents, level IgG against was significantly increased comparison with control group patients.