studies have demonstrated that plant extracts possess various biological characteristics, including immunomodulatory activity. heracleum persicum desf. (apiaceae), a medicinal plant native to iran, was studied for its immunomodulatory activity. immunomodulatory activity of different doses of an aqueous extract of h. persicum, was evaluated in female swiss albino mice. mice were treated with thr...

Four hundred and forty-six patients' sera from a hospital blood transfusion department in Newcastle were examined for toxoplasma antibodies by a haemagglutination test. Forty per cent. of the sera gave positive reactions, and an increase in the percentage of positive sera was found with increasing age, rising to over 60% at the age of 70 and over. A wide range of titres was demonstrated amongst...

To elucidate inconsistencies in rubella haemagglutinin assays the components of the assay technique were examined. The results of carefully controlled assays of rubella haemagglutinin antigens from different sources in various plates and diluents with four species of indicator cells are reported. The quality and quantity of gelatin in the dextrose-gelatin-veronal buffered diluent commonly used ...