188 



REPORT OF THE BUREAU OF ANIMAL INDUSTRY. 



Illinois, one in Indiana, and one in Ohio. In 1847 four are given in 

 Tennessee and one in Virginia. In 1848 we hear from it in one 

 county in Illinois, two in Indiana, two in Kentucky, one in North 

 Carolina, and one in Virginia. In 1849 it is mentioned as in one 

 county in Indiana, and in one county in Ohio. In 1850 we have ac- 

 counts of three outbreaks in Georgia, one in Pennsylvania, one in 

 Indiana, two in Kentucky, one in North Carolina, one in Ohio, and 

 two in Tennessee. In 1851 there were outbreaks in Illinois, Indiana, 

 and Tennessee. In 1852 there were two reported in Illinois, two in 

 Indiana, one in Missouri, and one in Ohio. In 1853 it invaded two 

 new counties in Illinois, two in Indiana, two in Kentucky, one in 

 North Carolina, four in Ohio, two in Tennessee, one in Texas, and 

 one in Virginia. In 1854 it appeared in one more county in Illinois, 

 four in Indiana, five in Kentucky, two in North Carolina, two in 

 Ohio, and one in Tennessee. In 1855 it is found in six counties in 

 Illinois, five in Indiana, one in Kansas, four in Kentucky, one in Mis- 

 souri, two in Tennessee, and one in Virginia. ( 



The number of outbreaks mentioned by correspondents, it will be 

 seen, is not less than ninety-three for the ten years, from 1846 to 

 1855, inclusive. As compared with the ten outbreaks reported for 

 the previous thirteen years this is an enormous increase. There can 

 be little doubt that it was during the period from 1846 to 1855 that 

 hog cholera became scattered over the country and fairly began that 

 work of destruction which has become so familiar to us in later years. 



Below will be found a tabulated statement of the replies from 

 nearly eight hundred and fifty of our correspondents. The figures 

 show the number of original hog cholera infections reported for the 

 different periods from the first recorded appearance of the disease in 

 this country to 1887. Of course there have been many counties in- 

 fected within that time which are not referred to in these communi- 

 cations, but the large number that were mentioned gives as perfect 

 an idea as can now be obtained of the development and spread of 

 this contagion. It is to be remembered that the outbreaks men- 

 tioned are not secondary infections, but are the first outbreaks of the 

 disease in the correspondent's locality, and in most cases the first 

 which occurred in his county. In nearly all cases it is stated that 

 previous to the outbreak referred to the health of hogs had always 

 been good, and the losses from disease had been confined as a rule to 

 a single animal at a time. 



Number and dates of original infections of hog cholera and swine plague, as com- 

 piled from recent correspondence. 



