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Biomedical subjects

P Ivanov

Publications and source records attributed to P Ivanov.

28 records · Page 2Linked to original sources
PubMed1975

[Possibilities of differentiation of the specific positive reactions for pullorum disease].

Studied were sera obtained from three groups of birds experimentally infected with Salmonella gallinarum-pullorum. Salmonella enteritidis, and Salmonella heidelberg, resp., using the whole serum agglutination reaction, the slow test-tube reaction (at 37 degrees and 50 degrees C), and the agar gel precipitation reaction as modified by Aoki as well as the spot-test of Williams. It was found that with the use of a typhus antigen it is not possible to differentiate the positive coagglutination reactions between Salmonella gallinarum-pullorum and the Salmonella bacteria of the B and D serologic groups. Differentiation of the coagglutination reactions between Salmonella gallinarum-pullorum and the bacteria of B serologic Salmonella group was effected through exhaustion of the sera with Salmonella-gallinarum pullorum after Castellani, followed by the study with an O-test antigen of Salmonella heidelberg.

Agglutination Tests↗
PubMed1975

[Study of methods for obtaining high-titer antispirochete sera].

A comparative serologic study was carried out on three methods for immunizing rabbits to obtain high titer antispirochete sera. It was found that the method making use of Freund's adjuvant produces the best immunization effect. Applying the spirochete substrate via the conjunctiva makes it possible to obtain a good immunization effect with the lowest amount of antigen. Using no unspecific stimulating agents it was possible to obtain high titer antispirochete sera combining the conjunctival application with the intravenous injection of the spirochete material.

Animals↗
PubMed1975

[Experience in the sanation of a pedigreed poultry farm pullorum disease].

A trial was carried out for the sanitation of three elite flocks of a total of 3578 chickens on a pedigree poultry farm applying the method of eliminating the infected birds. These were detected with the use of the whole-serum agglutination reaction (after Huddleson) and the tube agglutination reaction (after Wright). No means whatever were used to control the disease. Routine microbiologic methods were employed, however, to examine the eggs, embryos, and chicks obtained from these flocks. Thorough disinfection on the premises including all equipment as well as deratization were conducted after each investigation and elimination of infected birds.

Animals↗