BACKGROUND: Accumulating evidence points to the brain-derived neurotrophic factor (BDNF) as a biomarker for neuropsychiatric diseases, such as major depression. Mature BDNF is synthesized from its precursor form, proBDNF. Although BDNF levels in human blood can be measured using commercially available human BDNF ELISA kits, due to limited specificity of the BDNF antibody, these kits are unable ...

Swine hepatitis E virus (HEV) is widespread throughout pigs in both developing and industrialized countries. This virus is an important zoonotic agent and a public concern worldwide. Infected pigs are asymptomatic, so diagnosing swine HEV relies on detection of the virus or antibodies against the virus. However, several obstacles need to be overcome for effective and practical serological diagn...

We recently reported the production of the recombinant kinesin-related protein of Leishmania donovani with a molecular weight of 42 kd (rKRP42) and the value of the antigen in serum-based ELISA for the diagnosis of visceral leishmaniasis (VL). In this study, the rKRP42 antigen was validated with ELISA using urine samples (rKRP42 urine ELISA). The urine-based ELISA showed 94% sensitivity (108 po...

An indirect enzyme–linked immunosorbent assay (ELISA) was developed for screening of antibody to avian infectious bronchitis virus (IBV). Antigen was prepared from whole-purified IBV Massachusetts serotype (BR 801 strain). Optimum dilution with minimum background for antigen concentration, rabbit anti-chicken conjugate and sera in developed ELISA was determined 0.1μg/ml, 1:3000 and 1:100, respe...

An enzyme-linked immunosorbent assay (ELISA) kit for herpes simplex virus developed by Ortho Diagnostic Systems, Inc., was evaluated. In phase I experiments, 263 clinical specimens from genital lesions were extracted into serum-free medium and then tested by ELISA for herpes simplex virus antigen. The results were compared with those obtained by conventional viral culture. Of 83 specimens, 65 w...

background and objectives: the obligate intracellular bacterium chlamydia trachomatis causes sexually transmissible diseases in human. timely and sensitive detection of this pathogen is very important. there are many cross-reactions in bacteriological and serological methods in detection of this type of pathogens. the aim of this study was to achieve a more specific antigen for serological test...

The nucleocapsid (N) gene of infectious bronchitis virus (IBV) strain X isolated in China was expressed in E. coli and was purified as a recombinant protein. An indirect ELISA assay (N-ELISA) for antibody detection was established using the purified recombinant nucleocapsid protein. Antigen coating conditions and serum dilution for the N-ELISA were optimized. The S/P ratio of the absorbency val...

Background: Potency evaluation of rabies vaccine is a cheap, fast, high precision and consistent with ethical values is critical, so researchers have modified a variety of methods such as: National Institute of Health (NIH) method, Single Radial Immunodiffusion (SRID) and so on. The purpose of the present study was to replace an in vitro method consistent with medical ethics criteria instead of...