from farms which were without brucellosis. CGalves obtained 
from the cows having brucellosis failed to be utilized for the 
purposes of commercial production in Ukraine since 1957. Such 
young cattle were sent for slaughtering. 
The healthy cattle for substitution of sick cattle is used 
only at isolated animal-raising farms or their sections from 
where all sick cattle have been removed and the young ones 
obtained from them, too, have been taken out. The premises and 
territories of such farms must be free from animals throughout 
the summer. During this time, these are carefully cleaned from 
the dirt, are twice disinfected, and in the animal farming 
premises, in addition, capital sanitary repair is also done. 
With the purpose of quickest sanitation of the farms by 
way of substitution of sick cattle with healthy cattle, special- 
ized farms were created at clear places in a number of areas and 
regions, for raising healthy calves of a special herd of cows 
and also for the substitution of cows in farms having brucello- 
Sis. 
For carrying out sanitary measures, particularly in south- 
ern and eastern regions, earlier vaccinational-prophylaxis 
against brucellosis was carried out with the vaccine from 
Strain 19. 
Having analyzed materials on the application of the vaccine 
from strain 19, which was used in a general complex of anti- 
brucellosis measures on more than 900 farms, we arrived at the 
conclusion that positive result is given by the inoculation of 
the vaccine to the young cattle in un-clean farms and to the 
adult healthy groups of animals. By vaccination of animals 
during an outbreak of brucellosis and with a large number of 
abortions, we did not get the expected result. In addition, the 
inoculation of vaccine to the adult animals in un-clean farms 
lead to long (three to five years and more) preservation of 
positive serological reactions among the animals. Many such 
animals were particularly isolated in farms where the cattle 
were revaccinated, which significantly prolonged the period of 
sanitation of the farms. 
Along with this, the data of checking and analysis of 
materials on vaccination of the cattle gave a basis to think 
that positive serological reactions in periods remote after 
vaccination are observed in the animals, not only in the 
aS 
