478 
GEORGE FLEMING. 
proved that the disease can be transmitted to sheep, and the sheep- 
pox to pigs. Cases of accidental transmission from sheep have 
been recorded. Bollinger mentions that some young swine were 
attacked after being lodged in a pen where diseased sheep had 
been located some months previously, and these pigs communicated 
their malady to others which had not been in the shed in question. 
But that there is no generic relationship between swine and sheep- 
pox is again proved by reference to Denmark, where the latter 
does not exist, and where, nevertheless, swine-pox is sometimes 
prevalent, as in 1878, when it appeared in several localities in 
Jutland, according to the veterinary sanitary reports of that 
kingdom. The same evidence could be given with respect to 
other countries. Viborg, Spinola and Hering have proved that 
the disease is readily inoculable to other pigs. Dueling, Viborg 
and Hering have not been successful in transmitting swine-pox to 
the horse or cow; though Gerlach succeeded in inoculating a 
goat. The transmission of swine-pox to mankind has been some¬ 
times noted. Arnsberg,* for instance, knew of three persons 
who had been infected; and Roell gives similar evidence. Acci¬ 
dental transmission of human small-pox to pigs has been recorded 
now and again, and that this transmission may take place I do 
not deny; but it certainly does not prove that swine-pox is de¬ 
pendent for its origin on small-pox. The former occurs where 
the latter is not present, as in Denmark, and small-pox may rage 
for years in districts where pigs are numerous, and the latter show 
no signs of variola. In the Wiirteinberg reports for 1877, mention 
is made of the prevalence of the “ wild ” or wasserpocken (variolce 
serosae) among suckling swine. These pocks soon burst, and their 
contents mixing with milk, were ingested by the young pigs in 
the act of sucking. These had in a short time a yellowish-brown 
eruption, first about the eyes and nose, and then over the entire 
body. When the eruption was noticed early, and the young pigs 
were then removed from the sows, the consequences were not so 
serious; but when the exanthem extended over the entire body, 
they quickly died. Bathing them in bran water or camomile tea 
*Gurltzuud Hertwig, Magazin fur Thierheilkunde, band x. 
