2. The micro-organism regarded by Dr. Klein as this contagium is the
_streptococcus pyogenes_.
3. _Streptococcus pyogenes_ is found sometimes in company with
_staphylococcus pyogenes aureus_, as a secondary result in scarlet fever
and many other diseases.
4. A streptococcus was first observed in scarlet fever by Crooke, later
by Löffler, Huebner and Bahrdt; but its exact relation to scarlatina,
and its undoubted identity with the streptococcus from pus and puerperal
fever, was definitely established in 1885 by Frankel and Freudenberg.
5. Both the Wiltshire and Hendon cow diseases were called cow-pox by the
people on the farms.