PREVENTIVE MEDICINE 



ing statements : between 1894 and 1916 the number of outbreaks 

 varied between 1196 (in 1904) and 6305 (in 1895), leaving out 

 1905, in which only 817 outbreaks were recorded. The number 

 of outbreaks in 19H was 4356 and in 1916, 4331. During the 

 whole period 1894-1916 the disease existed in from 58 to 77 

 counties. In Great Britain its distribution is unequal and it by 

 no means follows that a county with a large pig population has a 

 correspondingly high rate of disease. The north and west of 

 Scotland, parts of Wales, and to a certain extent the Border 

 district are practically free from it. In Ireland, as seen from the 

 following table, it is most prevalent in Leinster (the Borough of 

 Dublin accounting for a large proportion of the outbreaks), and is 

 rare in Connaught : 



1914 1915 1916 



Ulster 3 37 19 



Munster 29 34 47 



Leinster 146 170 246 



Connaught 15 12 



193 



253 



312 



Borough of Dublin 



90 



107 



125 



In the following table are shown the pig population and the 

 number of outbreaks of swine fever for each of the four divisions 

 of the United Kingdom taken from the official returns. (For 

 the purpose of more clearly showing the disease incidence, the 

 outbreaks per 100,000 pigs have been calculated for the average 

 of the three years given.) 



Swine fever is as a rule more prevalent in districts thickly 



