[Comparative study of the antigenic composition of strains of Borrelia anserina. 2. Antigenic structure and immunobiologic relationships of a newly isolated strain]. / Sravnitelni prouchvaniia v'rkhu antigenniia s'stav na shtamove Borrelia anserina. 2. Antigen stroezh i imunobiologichni otnasianiia na novoizoliran shtam

Agar immunoelectrophoresis and an immunofluorescence method were used to analyse antigenically a newly isolated spirochete strain of the Borrelia anserina species. It was established that by its antigen structure it could not be classified under the already described two serologic types, Surnevo I and Pamoukchii. The strain possesses five antigens common to serotype Surnevo I and four antigens common to serotype Pamoukchii. Besides, it has also one typespecific antigen. This strain was said to belong to a new, third serotype named venets.

[The epizootologic effectiveness of Deptavac-HVT vaccine against Marek's disease in growing parents]. / Epizootologichna efektivnost na vaksina Deptavac-HVT sreshtu Marekova bolest pri podrastvashti roditeli

Three experiments with a total of 15 855 test birds and 20,081 controls were carried out to study the epizootiologic effectiveness of the immunoprophylaxis of Marek's disease using Deptavac-HVT vaccine under productional conditions.

[Study of the antigenic makeup of strains of Borrelia anserina, Sakharoff, 1891, of the Surnevo and Pamoukchii serotypes]. / Prouchvaniia vurkhu antigenniia sustav na shtamove Borrelia anserina, Sakharoff, 1891, ot serotipove Surnevo i Pamukchii

An antigen analysis of Borrelia anserina strains, belonging to two serotypes, was carried out for the first time by means of direct immunofluorescence microscopy, gel diffusion after Ouchterlony, immunoelectrophoresis as modified by Scheidegger, and whole serum macroagglutination reaction. It was found that the spirochetes of the strain Rouen of Pamoukchii serotype possess eight surface antigens, and those of strain Surnevo I of the same serotype have 6. The two strains were found to have as many as four common surface antigens, on the one hand, and two type-specific antigens each, on the other. Strain Rouen has a heat-resistant type-specific antigen, probably of a polysaccharide nature. Two of the surface antigens of strain Rouen were found to be more deeply bound in strain Surnevo I.