256 DISEASES OF CATTLE. 



can bear, every ten or fifteen minutes. When this . has been kept up 

 for an hour or two the bag may be dried, well rubbed with soap and 

 left thus with a soapy coating. If the pain is great, extract of bella- 

 donna may be applied along with the soap, and a dry suspensory band- 

 age with holes for the teats may be applied. Strong mercurial oint- 

 ment is very useful in relieving pain and softening the bag. This is 

 especially valuable when the disease is protracted and induration 

 threatens. It may be mixed with an equal amount of soap and half 

 the amount of extract of belladonna. In cases of threatened induration 

 excellent results are sometimes obtained from a weak induction current 

 of electricity sent through the gland daily for ten minutes. 



If abscess threatens it may be favored by fomentation and opened as 

 soon as fluctuation from finger to finger shows the formation of matter 

 at a point formerly hard. The wound may bleed freely, and there is a 

 risk of opening a milk duct, yet relief will be secured, and a dressing 

 twice daily with a lotion of carbolic acid, 1 part, water, 20 parts, and 

 glycerin, 1 part, will suffice to keep the wound clean and healthy. 



Gangrene of the affected part is often fatal. It demands antiseptics 

 (chloride of zinc, 1 dram to 1 quart water) applied frequently to the 

 part, or if the case can not be attended smear the affected quarter with 

 melted Venice turpentine, or even wood tar. Antiseptic tonics (tinc- 

 ture of muriate of iron, 4 drams) may also be given four times daily in 

 a quart of water. 



CONTAGIOUS MAMMITIS CONTAGIOUS INFLAMMATION OF THE UDDER. 



As stated in the last article, that form of inflammation of the udder 

 which attacks the gland ducts and follicles, causing deep-seated, hard, 

 nodular swellings, is often contagious. Franck has demonstrated this 

 by injecting into the milk ducts in different cows (milking and dry), 

 the pus from the bags of cows affected with mammitis, or the liquids 

 of putrid flesh, or putrid blood, and in every case he produced acute 

 inflammation of the gland tissue within twenty -four hours. He thinks 

 that in ordinary conditions the septic germ gains access by propagating 

 itself through the milk, filling the milk canal and oozing from the exter- 

 nal orifice. He points to this as a reason why dry cows escape the 

 malady, though mingling freely with the sufferers, and why such dry 

 cows do not suffer from inflammation of the gland tissue when attacked 

 with foot-and-mouth disease. In this last case it is evident that it is 

 not simply the inoculation with the milker's hand that is lacking, for 

 the skin of the bag is attacked, but not its secreting glandular parts. 

 Now that in any case of abscess we look for the cause in the chain 

 forms of globular bacteria (Streptococcus pyogenes), in the cluster form 

 of white globular bacteria (Staphylococcus pyogenes albus), and in the 

 golden and citron yellow forms of clustered globular bacteria (Stapliy- 

 lococcus pyogenes aureus and Staphylococcus pyogenes citreus), the for- 

 mation of pus gives presumptive evidence of the action of one or more 



