DISEASES OF FARM ANIMALS 219 



condition is regained more quickly if the calf is 

 allowed to suck the cow. In the first stages bloody- 

 milk is secreted and often pus is formed in one 

 quarter or more of the udder. The udder should 

 be carefully milked, cleaned, and, if the milk ducts 

 are closed, it may be necessary to use a milk tube. 

 This should be used cautiously so as not to injure 

 the tissue of the udder and should be perfectly 

 clean before inserting, otherwise serious inflam- 

 mation may result. In bathing, use hot water for 

 IS to 20 minutes at a time, after which rub dry and 

 apply an ointment made by dissolving 3 tablespoon- 

 fuls of gum camphor and 4 tablespoonfuls of fluid 

 extract of belladonna to a pint of clean, fresh lard. 

 This ointment should be applied three times a day. 



A more serious form of the disease is known as 

 contagious mammitis, and is due to invasion of the 

 gland by bacteria. In cases of this kind the in- 

 flammation is more extensive and the disorder calls 

 for more careful treatment. Since the milk con- 

 tains bad bacteria, it is necessary to destroy them 

 so as to prevent spreading of the disease. The 

 milker should have clean hands and should wash 

 them in a disinfecting solution before milking an- 

 other cow. The milk tube may be necessary in 

 withdrawing the milk. After the milk has been 

 removed from the udder, inject a solution of per- 

 oxide of hydrogen or dioxygen or a solution of 

 carbolic acid, i part to 50 parts of boiled water. 

 After the solution has acted for a few minutes, it 

 should be milked out. The external treatment for 

 contagious mammitis should be similar to that of 

 ordinary mammitis. 



MANGE.— See Scab in Cattle. 



MILK FEVER.— It is a remarkable fact that this 

 disease occurs most commonly in cows which 



