606 
W. R. COOPER. 
is similar to the var. aureus in every respect except color, be¬ 
ing white. It possesses an extraordinary vitality, living 3J 
years in the absence of air. (Crookshank). 
The staphylococcus pyogenes, var. citreus (passet) also re¬ 
sembles the var. aureus in all respects except color and form of 
growth, being a light lemon yellow, and presenting a wrinkled 
growth on nutrient agar agar. The relative number of cases 
containing the different germs varies. In septicaemia where 
no abscesses are formed, the streptococcus pyogenes is found 
in the greater number of cases. In Pysemia with multiple 
abscesses, the staphylococcus pyogenes, var. aureus, is found 
most frequently, the staphylococcus pyogenes, var. albus, less 
frequently, the streptococcus pyogenes still less frequently, 
and the staphylococcus pyogenes, var. citreus, occasionally. 
The germs that have been isolated from the clinical cases 
of the Veterinary Hospital during the past year, were 
the staphylococus pyogenes, varieties aureus, albus and citre- 1 
us; and the streptococcus pyogenes. The several varieties 
of the staphylococcus pyogenes were isolated many times 
from abscesses and wounds. The streptococcus pyogenes 
was obtained from the liver of a suckling foal about ten days 
old that died of septicaemia, May 10. Post-mortem examina¬ 
tion revealed a very dark or blackened appearance of the in¬ 
testines. An abscess near the naval which was the point of 
infection. The liver and spleen were very dark in color. The 
germ was obtained from the liver. It was cultivated in bouil- 
lion and agar agar. Experiments with this culture were as 
follows:—June 2, inoculated a mouse subcutaneously from 
the agar agar culture of May 10. Death occurred in about 
twenty-four hours. The post-mortem examination revealed 
an enlarged liver, the spleen dark-colored and the intestines 
nearly black. The liver contained a streptococcus which was 
then used, June 4, to inoculate a mouse subcutaneously. 
Death occurred in about twenty hours. The post-mortem 
examination revealed an enlarged liver and spleen, which was 
dark-colored. The lungs were covered with extravasated blood 
and very dark-colored. The germ obtained from the liver 
was the same as that obtained from the colt, or the strepto¬ 
coccus pyogenes. 
