why a correct diagnosis of the foot and mouth disease has often 
been delayed in newly born calves and pigs, consequently, the 
farms cannot commence to take the necessary timely measures to 
combat foot and math infection, thereby allowing the virus, time 
to attack full grown animals, 
. The spread of foot and mouth disease through milk products, 
is characterized by the fact that the infecticen has usually been 
transmitted to farms where a particular milk dairy is operating. 
in fresh out-breaks of foot and mouth disease, in farms, where 
the infection has been transmitted through milk products, as a rule, 
the infection first starts attacking calves and piglets.. In the 
transmission of foot and mouth infection through milk products, 
even one farm which has been attacked by the foot and mouth disease, 
is sufficient to spread the disease to others as yet unaffected, 
because ef a dairy which had not carried out the necessary purifi-+ 
cation of the milk, 
As far as the role of products of animal farms themselves, in 
the spread of foot and mouth infections, we have not established 
@ Single case where the virus was transmitted to such distant 
regionse 
Very often, foot and mouth virus is tranemitted to farms, 
which have not so far been affected by the disease, through water, 
Specially rivers. Thus, during a foot and south epizootic in many 
farms of the Republic, fresh outbreaks in farms which have not so 
far been affected by the virus were observed by veterinary speciale 
ists in regions which were connected by river waters. The data 
Gollected by our Scientists indicated four cases, where the epi- 
zootic foot and mouth flare-ups had occurred in farms which were 
situated down stream at distances of 6 to 18 km, from the source 
of the foot and mouth infection and where the cattle continued to be 
watered untill such time as the foot and wouth disease became 
evident in these animals. 
Exerita and Urine play a very important role in the apread of 
foot and mouth infection, According to our data, 4% of foot and 
mouth infections has resulted from excreta and urine of diseased 
cattle. It has been established that during the cold weather, the 
foot and mouth virus remains virulent in the excreta for a period 
of 150 to 168 days, hence the excreta and urine should be consi- 
dered as very importart agents in keeping the infection alive in 
outer media. If it is taken into consideration that during the 
winter months, it is practically impossible to render harmless the 
excreta of cattle suffering from foot and mouth disease or to 
completely disinfect the grazing lands of the animal farm in the 
grip of foot and mouth disease, then tae importance of the excreta 
and urine in the propagation of the disease acquires even more 
Significance. “s 
(4) 
