In the present study, we investigated antibody productions of IgA and other classes, such as IgE and IgG1, in mice as possible evidence of the protective effects of Spirulina toward food allergy and microbial infection. An increase of IgE antibody level in the serum was observed in the mice that were orally immunized with crude shrimp extract as an antigen (Ag group). The antibody level, howeve...

Immunodiffusion experiments were conducted to associate a precipitin line with Escherichia coli heat-labile enterotoxin (LT). Wild strains of porcine and of human enteropathogenic E. coli as well as laboratory-derived enterotoxigenic variants of E. coli K-12 were used for LT antigen preparations. These were produced mainly by ultrafiltration and ammonium sulfate precipitation of broth culture s...

Rogers, Thomas E. (Louisiana State University, Baton Rouge), Richard J. Hidalgo, and George T. Dimopoullos. Immunology and serology of Anaplasma marginale. I. Fractionation of the complement-fixing antigen. J. Bacteriol. 88:81-86. 1964.-Studies were conducted to fractionate and purify the complement-fixation (CF) antigen of Anaplasma marginale in infected erythrocytes of cattle. Initial attempt...

The current work aimed to evaluate the cross-reactivity of human immune sera against crude hydatid fluid antigens of sheep, human, mouse, cattle, as well as B fraction of cystic fluid antigen. 30 balb/c mice were infected with sheep hydatid cyct fluid antigen containing protoscolex after the viability of these protoscolices was assessed. ANOVA was used to test the difference of themean of optic...

BACKGROUND Cystic echinococcosis caused by the metacestode of Echinococcus granulosus is a major problem in both humans and domestic animals health. Therefore, a standardized and approachable diagnostic tool (rapid tests) for the serodiagnosis of cystic echinococcosis (CE) is still needed. METHODS In the present work, antigen B labeled with gold nanoparticles was used to detect antibodies aga...

Crude and excretory/secretory (E/S) antigens of Fasciola hepatica were subjected to SDS-PAGE and Western blot analysis in order to identify protein bands that would enable the specific and sensitive immunodiagnosis of sheep. Sera from 20 sheep with natural infections of F. hepatica, Dicrocoelium dendriticum, Cyst hydatid, Cysticercus tenuicollis, Trichostrongylidae, Paramphistomum spp., and Tri...

Crude antigenic preparations from Setaria equina were used in ELISA and Western blotting to examine cross-reaction with human sera from areas endemic for bancroftian filariasis. Sera from normal subjects from non-endemic areas were included as negative controls. Cross-reaction was found between S. equina antigens and antibodies in the sera of Wuchereria bancrofti-infected patients, with the hig...

BACKGROUND There are no effective vaccines for visceral leishmaniasis (VL), a neglected parasitic disease second only to malaria in global mortality. We previously identified 14 protective candidates in a screen of 100 Leishmania antigens as DNA vaccines in mice. Here we employ whole blood assays to evaluate human cytokine responses to 11 of these antigens, in comparison to known defined and cr...

adjuvant; a second intramuscular injection of an equal amount of antigen in Freund’s incomplete adjuvant was given 1 month later. Then 1 week later rabbits were bled, and a crude immunoglobulin preparation was made by the method of Kekwick (1940). The results shown in Fig. 1 suggest that the human neuroblastoma line contains monoamine oxidase activity of an A type, whereas that of MC63 cells is...