for the most part, and only in one of the western regions of 
the Republic, in 1953, the disease proved to be malignant in 
nature, 
After vaccinating the majority of the large cattle in 
areas that were in danger of the disease and areas where the 
virus had flared-up, the virus that had caused a malign form 
of illness, had changed its properties in animals that were 
vaccinated against the Foot-andeMouth Disease and the malign 
form of morbidity had ceased (G.F. Bondarenko, 1959). 
Each of these three epizootics had its owh peculiarity 
in the development, duration and intensity of the process, 
If we accept as 100% the number of animals which had 
developed the Foot-and-Mouth disease during the 1952-1955 
epizootic (Pooteand+-Mouth Disease type A-7), then the number 
of the large cattle that went down with the disease during 
the 1958-1963 epizootic (Pooteand-Mouth Disease type 0-2) was 
59, the number of pigs was 240 and sheep 972; whereas during 
the 1965-1966 epizootic (Footeand-Mouth virus type A=22) the 
number was: 570, 612 and 445 respectively. 
fhe data available illustrates that the first two epizootics 
were longer, but the number of animals, namely, the large 
@attle and pigs that had developed the disease were substantially 
less than during the latest epizootic of 1965 - 1966. 
Although the number of danger points was less in 1965-1966, 
@6 compared to the epizootic caused by the virus type A#-7, the 
-mumber of animals which had developed the disease among the 
large cattle was more by 5.7, the number of pigs by 6.1, sheep 
and goats by 4.4 times. 
j The number of large cattle which had perished as a result 
of the foot and mouth disease during the 1952-1955 epizootic 
Was 067%, pigs 5.4%, and sheep 1%; during the epizootic of 
9958 to 1963 it was 147, 1166 and 4.5, respectively; whereas 
during the 1965 to 1966 epizootic the number was 0.2, 1.8 and 0.5% 
ef the total number of animals which had developed the Footeand- 
Mouth disease. 
Bach epizootic had its own peculiarity and after-effects: 
(3) 
