240 IOWA DEPARTMENT OP AGRICULTURE 
to take the blood of this immune animal to vaccinate another. The 
animal 'must be hyper immune. 
I believe that in the use of this serum or vaccine we have one of the 
things that will help us to get rid of hog cholera or control it. If you 
have an outbreak you could vaccinate or use serum on the hogs you have. 
The ones that are affected would probably die. Those not affected would 
probably go through the attack. Then your neighbor's hogs could be vac- 
cinated, a quarantine established on the farm where the disease exists 
and stop the spread of it right there instead of letting it run from one 
county and state into another. You know that a great many times you 
buy hogs in different parts of the state and have them shipped and get 
hog cholera. I know of two or three instances where it has been carried 
in that way. A great many get it from the state fair, from shipping to 
other state fairs, and in different ways. But it could be prevented in 
the way I have outlined. 
The next thing is the cost. One man who had bought a bunch of hogs 
that all died came around to know if we had any more serum. He wanted 
some to vaccinate some hogs to put after his cattle. If he could afford to 
do that even at a dollar and a half a dose, a man who can sell for fifty 
or sixty or a hundred dollars could well afford ten dollars to have them 
vaccinated. He not only loses the hogs but he loses the care and attention 
and years of breeding to breed them up to the present time. I think that 
in using serum or in using the serum and virulent blood that you have a 
means of preventing hog cholera that every one should use. If you have 
a bunch of hogs, say a hundred, and it costs ten dollars apiece to have 
them vaccinated. Say ninety-five per cent of the animals vaccinated go 
through the outbreak. Of course, you would lose maybe a hundred dollars 
or so. But where you did not have them vaccinated you would lose fifty 
or sixty or seventy per cent of your animals and some you might just as 
well lose because they would not take on fat. You have saved three or 
four hundred dollars right there and have saved the animals and the breed- 
ing of all the individuals that you have, so it is a proposition that seems 
to me you should not turn down. As to the methods of getting serum, 
that remains to be worked up. 
You may say there is no cholera in the state. During the last week 
I have received twelve or fifteen letters from different sections of the state. 
A man wrote from Cambridge that he had it about a half mile from his 
place. I don't know how many herds were vaccinated last fall by Dr. 
Niles experimenting with this serum and the results have all been satis- 
factory, exceeding expectations in lots of cases where they had lost hogs 
in the herd, using the serum and bringing the rest through without any 
trouble. One man told me of a case where a sow had six pigs. They vac- 
cinated the sow and one pig and reported that sow had one pig that lived 
and the other five died. I know that this is the history of these out- 
breaks. There are hog cholera cures on the market but they are no good. 
I have not .tried them myself, but I have seen the results of the vaccina- 
tion. But I know that the animals that were vaccinated with the vaccine 
as prepared by Dr. Niles went through the attack without any disease at all. 
