624 
W. SILBERSCHM1DT. 
* 
lowish membrane, surrounding the spleen also. The blood gives a pure culture of 
swine plague. 
No. 260.—Vaccinated against hog cholera; 6 injections of blood sterilized by 
heat, 8 cc. altogether. Resists a test of hog cholera ; 4 days later receives 3.10 cc. 
of virulent blood of pneumoenteritis ; two witnesses die in two and in three days ; there 
is formation of an oedema on the injected ear, which disappears in a few days. 1 
New test against hog cholera a month after, weak local reaction seven days after in¬ 
jection of 1.20 cc. of virulent culture of swine plague ; large abscess at the injected 
ear, the rabbit seems sick, but soon revovers. One witness, which has received the 1 
same dose of virus, dies in less than 24 hours, and a third rabbit, insufficiently vac¬ 
cinated, dies in the same way the fourth day. 
The dog vaccinated against swine plague receives one injection of 2£ cc. of vir- ; 
ulent blood of pneumoenteritis, which makes him sick for several days ; a short time 
after he also resists an inoculation of 2^ cc. of virulent blood of hog cholera. 
To be complete, I shall also relate the experiment made upon rabbit No. 85, 
vaccinated against swine plague; he resists the test injection, the 4-XI. The 2-XII 
ke receives an injection of 2 cc. of swine plague , sterilized at 58°, and the 4-XII, 
one of virulent blood of hog cholera. His weight, which was 2k-530 on the 2-XII 
before the test, is reduced to 2^375 on the 4-XII. The 7-XII, the rabbit has a 
large abscess, its weight, 2k-i8o; the 16-XII, 2k-5io ; the 4-I, 2^640; the 13-I, 
2k-500. T. he abscess is opened and cauterized. The rabbit dies the 23-I, and 
presents, besides the abscess, a dilated stomach and a large spleen. The witness 
died 15 days before. 
It is to be observed that the test inoculation against hog j 
cholera has been made only two days after an injection ot j 
swine plague and that the rabbit had lost 150 grams of flesh, 
always indication of the debilitating effect of toxine. I think j 
we ought to exclude this experiment. 
In all the other cases, the rabbits vaccinated against swine 
plague have resisted the inoculation of hog cholera virus, or of 
infectious pneumoenteritis, while all the witnesses have suc¬ 
cumbed. A fact to notice is, that it seems that the resistance 
to those two microbes is proportional to the degree of resist- , 
ance against *swineplague ; for instance, rabbit No. 183, which 
had resisted but one dose relatively weak of toxine of swine , 
plague, has presented the strongest reaction after the injection 
of pneumoenteritis. 
A rabbit vaccinated against hog cholera has supported very 
well an inoculation of pneumoenteritis, which has killed two 
witnesses, and has resisted afterwards to an injection of swine 
plague culture, mortal for the witness and the rabbit insuffi¬ 
ciently vaccinated. 
