THE BACTERIA IN CONTAGIOUS MALADIES. 169 
been studied by Luginbiihl, Weigert, Hallier, 
and Cohn. ‘These micro-organisms possess the 
characters of all the spherical bacteria, and are 
found in the variolous pustules, the rete Malphigu, 
the liver, the spleen, the kidneys, and the lym- 
phatic ganglia. We can only insist upon the fact 
of the concomitance of the variola and the pres- 
ence of JZicrococcus, since experiment cannot be 
resorted to in this disease, of which the complete 
evolution only occurs in man. We also find in 
vaccine lymph analogous Jicrococci, in every 
point of view, to those of variola. Cohn considers 
them both, not as distinct species, but as two races 
of the same species, — the Micrococcus vaccine. 
Scarlatina.—Coze and Feltz have found in 
the blood of scarlet-fever, taken from patients, 
living or recently dead, some rods as well as mo- 
bile points. ‘This blood injected into the cellular 
tissue of rabbits has sometimes produced death, 
and the blood of the animals experimented upon 
has presented the same bacteria as human blood 
of scarlatina: they are simply a little larger and 
longer. As to the mobile points, they appear 
to correspond to the Micrococcus of scarlatina 
described by Hallier. 
Rugeola.—The examination of the blood of mea- 
sles has shown to the same experimenters, bac- 
teria of extreme minuteness and great mobility. 
The inoculation of this blood has not produced 
the death of rabbits; however, these animals have 
