NEWS AND SUNDRIES. 
141 
6. Organisms not capable of growing in the blood may yet 
cause serious effects by growing in the excretory canals. This 
may explain some cases of pyelitis. 
7. Where an organism is not markedly pathogenic, it may be 
necessary to introduce a large quantity before morbid changes are 
set up. 
8. Suppuration is not always due to micrococci; it may be 
caused by chemical irritants, such as croton oil. 
9. Micrococci are always present in acute abscesses, and are 
probably the cause of them. 
10. In some cases the micrococci are the primary cause of the 
inflammation and suppuration, as in pyemic abscesses ; generally, 
however, they begin to act after inflammation has been previously 
induced. 
11. This inflammation may be caused by an injury, by the ab¬ 
sorption of chemically irritating substances from wounds, by cold, 
etc. 
12. There are several different kinds of micrococci associated 
with suppuration. 
13. Micrococci cause suppuration by the production of a 
chemically irritating substance, which, if applied to the tissue in a 
concentrated form, causes necrosis of the tissue, but, if more di¬ 
lute, causes inflammation and suppuration. 
14. The conditions in wounds and abscesses are not the same, 
inasmuch as in the former there is opportunity for mechanical and 
chemical irritants to work. 
15. There is no reason for denying the existence of “ antisep¬ 
tic” suppuration. 
16. Tension may also cause suppuration, but it is perhaps 
most frequently aided by the growth of micrococci. These or¬ 
ganisms need not be of a very virulent kind. It is also probable 
that the products of inflammation are themselves irritating and 
capable of exciting or keeping up inflammation. 
17. The micro-organisms of septicemia, of pyemia and of 
erysipelas, are different from one another and from those of ab¬ 
scesses. In erysipelas the micrococci grow in the lymphatic 
spaces; in pyemia they grow in the blood to form colonies and 
