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...

the objective of this research was to investigate the efficacy of dietary inclusion of probiotics primalac® and bactocell® and prebiotic fermacto® on broiler’s performance and immune response, individually or in combination. a total of 540 one-d-old male ross 308 broiler chicks were allocated into 6 experimental treatments with 6 replicates of 15 birds per replicate from 1 to 42 d of age. the b...

57 women affected by abortion or threatened abortion were investigated in view of antitoxoplasmosis antibodies by immunofluorscence. 11 women who have aborted for the first time have positive titer of polyvalent antibodies more than 1/400. 77.3% of these women have igm titer greater than 1/20. the highest percentage of abortion was in the third month of pregnancy and this is probabley related t...

The present study was conducted over a period of one year to find the right time for measles vaccination when maternal antibody titer in infants was decayed rendering them susceptible to wild virus infection. Blood samples were collected from the cord of new born (147), 2-5 months (47) and 5 to 7.5 months (24) of age. The mean measles IgG antibody titer detected in cord blood at birth (0 months...

Hemolytic disease of newborn (HDN) is caused by the emergence of inappropriate antibodies against fetal blood antigens, which includes ABO and Rh blood group incompatibility. This study investigated the association between prenatal blood group antibody titer and HDN to provide a theoretic basis for clinical practice. ABO and Rh blood group of 7894 pregnant women and their husbands were screened...

Background: Systemic Lupus Erythematosus (SLE) is a chronic autoimmune disease which is characterized by B-cell abnormality and auto-antibody generation. Since bacterial infections are the most important causes of mortality in these patients, pneumococcal vaccination is recommended for children with SLE. Objective: To investigate humoral immunity and specific-antibody formation in response to a...

This research aimed to evaluate the effectiveness of H5N1 Avian Influenza vaccination in different duck breeds and to assess the magnitude of maternal antibody titer transferred from the vaccinated hen to the eggs and off ducklings as a protector agent against H5N1. Experimental research was conducted on 16 male and 48 female mallards and 16 male and 48 female Muscovy ducks aged 16 week old. Th...

Serological test based on IHA (Indirect Haemagglutination Method) was performed in 100 cases of hepatic abscess. The test was 100% sensitive and 94% specific. The cut off point of antibody titer between normal population and patients with invasive amoebiasis was 1:128. Antibody titer in amoebic liver abscess was 1:5242 +/- 2795. A significant (P less than 0.001) correlation was found between to...

Tilapia aurea showed a specific immune response to Salmonella typhimurium. S. typhimurium was introduced into the gut of T. aurea by force-feeding. S. typhimurium was isolated from the fish viscera after 15 days, but at 30 days viable cells were not detected. T. aurea had an antibody titer to S. typhimurium after 30 days which was fivefold greater than the natural background antibody titer. An ...