5 
and the mass immunization of animals as a measure of prophylaxis 
and, possibly, oer teks changes in the properties of the causal - 
agent. 
The experience in combating the FooteandsMouth Disease 
has proved that in the continental countries, which are 
connected by land, it is impossible to achieve a substantial 
decrease in the development of the footeand-Mouth Disease by 
employing only general veterinary sanitary measures, because 
of widely distributed virus-carriers. As a result of this, such 
countries have to employ vaccination. 
In the Ukrain, taking into consideration the epizootic 
conditions of this infection, the prophylactic method of 
immunization was utilized on animals throughout the whole 
territory or in special regions of the Republic. 
The prophylactic vaccination of the animals against the 
Footeand-Mouth Disease in the Ukrain SSR was commenced at the 
end of 1953, when in order to fight the malignant type of 
 PooteandeMouth Disease, a complex method, which included the 
weterinary sanitary measures with vaccination, was employed, 
During this period, the vaccine was manufactured in a 
limited quantity, using the VIEV method. 
q During the recent years, the vaccination of the large 
Cattle with the aim of weaheaset o is very common throughout 
| the Republic ° 
In 1967, we immunized 29378,9 thousand heads of large 
eattle, 54.3 thousand pigs and 10663 thousand sheep; in 1968 
the number was 18034, 66.3 and 34.7, respectively; in 1969 the 
number read: 3564906, 5102 and 31.9, respectively; in 1970 the 
‘number of animals immunized was: 29549.7, 79.0 and 41.8, 
‘respectively and finally in 1971 it was 24514.3, 140 and 
130634 respectively. 
fhe vaccination was carried in certain regions (zones), 
depending on the epizootic situation. | 
‘a Thus, for example, in the western regions where the disease 
Was not recorded for more than 5 years, the anti Footeand-Mouth- 
(5) 
