Humoral immune response of vaccine-I (supermatent from sonicated sporulated oocyst), vaccine –II (sediment from sonicated sporulated oocyst) and vaccine –III (un-sonicated sporulated oocyst) against conccidiosis in chickens was determined by indirect haemagglutination (IHA) test. IHA antibody titre was significantly higher (p

1. Polymers of orosomucoid were produced in two molecular shapes, filamentous (;chain') and spherical (;ball'), by heating the sodium salt of the monomer in either water or high concentrations of sodium chloride. An ;intermediate' state containing both shapes in various proportions was found in preparations obtained by polymerizing orosomucoid in intermediate concentrations of sodium chloride. ...

Because of its relative ease of operation the haemagglutination inhibition (HAI) test has been widely used in diagnostic virus serology for detecting specific antibody to haemagglutinating viruses. Erythrocyte species of animal origin are used more frequently than human group 'O' cells in haemagglutination (HA) and HAI tests because they are usually more sensitive to agglutination by certain vi...

The exact nature of the "rheumatoid factor" is unknown, but it appears to be an antibody-like substance composed of a gamma globulin complex of high molecular weight. Two groups of tests have been used to detect it: the haemagglutination test and the latex-fixation or Bentonite flocculation test. In the first group the indicator consists of sheep red cells with rabbit anti-sheep haemolysin as t...

A woman who had had high titres of rubella antibodies some months before she became pregnant gave birth to an infant in whom congenital rubella was confirmed at 4 months. Rubella haemagglutination inhibition tests, complement fixation tests, and immunofluorescence tests with anti-human IgG were carried out on sera from the mother. Rubella antibody titres in sera obtained in March 1971, seven an...