126 
GEORGE MULLER. 
found to the number of 30-60, (exceptionally as many as 200); 
they then cause a violent impetiginous dermatitis with defluvium 
capillorum, thickening of the skin, and crusting. The bluish-red 
pustules show the site of the sebaceous glands, and on pressure a 
bloody purulent mass can be evacuated, in which numerous acari 
will be found. In this severe form, the eruption begins as a rule 
on the head, spreads gradually over the entire body, and finally 
causes general emaciation and death. 
In rare cases the eruption remains limited to certain spots, 
(especially around the eyes), and appears as moderately intense 
dermatitis erythematosa with desquamation of the epidermis. 
Itching is usually absent in this malady ; in fact, the dog gen¬ 
erally shows evidences of pain when the affected parts are 
rubbed. Demodex eanis, according to Ziirn, is sometimes trans¬ 
ferred to man, and then causes an itching, pustular eruption, 
which, however, is easily curable. The experiments made by 
Gruby, of transferring demodex hominis to the dog, caused fall¬ 
ing off of the hair, but no dermatitis pustuloso. 
Demodex pkylloides suis, causes a pustulo-ulcerative eruptiou 
in the pig. According to Croker, there appear pin-head to hazel¬ 
nut sized swellings on the flanks, neck and breast. These gradu¬ 
ally coalesce, and form larger or smaller ulcerations. 
Demodex cati has been found in the neighborhood of the 
nasal openings, and in the fundus of the ears of cats. 
Besides this, demodex has been found in isolated cases in cat¬ 
tle, (Faxon, Grimm), and in the Sambur-stag, (Prietsch). 
Therapy .—The most appropriate remedies so far known are: 
balsam of Peru, (Seidamgrotzky), styrax, (Yogel), sulphuret of 
potassium solutions, followed by cantharidal ointment, (Brusasco), 
sublimate in 1 per cent, solution, and as salve, (Frohner); less 
certain are balsam of tolu, naphtholin, sulphuret of potassium 
solutions. Only in very mild cases will it suffice to use salicylic 
acid ointment, benzine ointments, carbolic acid solutions, and ol. 
juniperi aethereum. 
17.— Bound worms. 
There now and then occur, in the domestic animals, skin dis¬ 
eases which are caused by round worms. Thus Rivolta, Laulaine 
