4@2 INFLAMMATIONS. 
discharge may be seen to flow on removing the scabs which fill 
them. The dog feeds well, but from want of sleep is languid and 
listless; there is considerable thirst and some slight feverishness, 
but very often the flesh is maintained for months at a high rate. 
The treatment of this form of mange is founded upon the belief 
that it is caused by an insect, Sarcoptes canis, which has been 
detected by the microscope in many cases, but which by some 
people is maintained to be an accidental effect, and not a cause of 
mange. However this may be, it is found that remedies which 
are destructive to insect life are by far the most efficacious, such 
as hellebore, sulphur, corrosive sublimate, tobacco, &c. The second 
kind of virulent mange is more rare than that described above, 
and still more difficult of cure, the vegetable parasite being less 
easily destroyed than the insect. This parasite is supposed to be 
of the nature of mould or fungus, which we all know is most ob- 
stinately tenacious of life, and is reproduced again and again in 
any liquid where it has once developed its germs. In outward 
appearance this variety of mange differs very little from the insect- 
produced form, but it may be known by its generally attacking 
young puppies ; while the other appears at all ages, but chiefly in 
the adult animal. The hair falls off in both, but there is more 
scab in the insect mange, probably from the fact that it does not 
produce such violent itching, and therefore the scratching is not 
so incessant. The treatment is nearly the same in both cases, being 
chiefly by external remedies, though alteratives, stomachics, and 
tonics are often required from the loss of health which generally 
accompanies the disease. In all cases, therefore, it is necessary to 
attend to this, giving generally a mild aperient first, such as (12) 
or (13) and subsequently (2) and (3) combined together, or (1) 
and (59), according. to circumstances. At the same time one of 
the following applications may be tried externally, with the greatest 
care that the dog does not lick them off, as they are highly poi- 
sonous when taken into the stomach. To the wash some aloes is 
added, with the view of preventing this by the bitter taste of the 
drug ; but though it has this good effect partially, there is nothing 
like a wire or leathern muzzle kept constantly on, except when 
feeding, at which time, of course, the tongue is otherwise engaged. 
All applications must be rubbed well into the roots of the hair. 
