128 VETERINARY OBSTETRICS. 
application of a rubber ring, carefully fitted, and not. 
too tight. Similar wounds on the udder can be dressed 
with adhesive plaster, collodion or wound gelatine, the 
hair first having been shaved off. The use of the teat, 
or milk syphon, assists in procuring healing by primary 
union. In wounds which have been in existence for some 
time, treatment must follow general principles. 
Bruises, accompanied by the passage of blood-stained 
milk, require strict cleanliness to prevent infection; 
Fic. 51. 
RinG TEAT SYPHON, 
blood and ilk removed by catheter or milking tube, 
and resorption assisted by moist heat. 
Mammitis or Mastitis. 
INFLAMMATION OF THE MAMMARY GLAND OR UDDER. 
According to Moller (Dollar's translation), the 
causes of acute inflammation may be divided into. 
mechanical, chemical, thermal, and specific. In cattle, 
the first takes the form of horn thrusts and similar 
injuries, treads, etc. Chemical or thermal irritants are 
much less frequent, although irritant substances may 
produce acute mastitis. Chills may also be a possible 
cause. Specific irritants are the most important, and 
different bacteria have been described as the cause of 
acute mammitis. 
Infection may occur by three channels: (1) Through 
slight injuries to the skin. (2) From the mammary 
