Herpes Labialis. Pemphigus. 8^5 



1 to 3 days the vesicles dry up to brown crusts, and after these fall off 

 the redness of the skin soon disappears. 



Treatment is only necessary in the presence of excoriations and 

 then an ordinary dvisting powder or painting with lead acetate solution 

 may be resorted to. 



Herpes Zoster. (Shingles; Zona, Fr.) In human medicine this term is ap- 

 plied to a peculiar vesicular eruption in which small vesicles occur profusely in the 

 territory supplied by a definite nerve, and which may be traced to a disease of the in- 

 tervertebral ganglia or the nerves themselves, or to an affection of the trophic nerve 

 fibers. A similar affection is said to have been observed by Megnin in a horse on 

 whose body thickly clustered vesicles formed, which crossed the direction of the 

 hairs, forming stripes 1 to 2 cm. broad which were separated from one another 

 by healthy stripes of skin of like width, so that the appearance was like that of a 

 zebra skin. Further, Hebrant claims to have seen shingles in a two-year-old dog. 

 On one flank of this dog, a patch about 3 cm. broad was covered by sero-fibrinous 

 masses, round about which and as far as the median line, little nodes and dried 

 lip exudate could be seen; severe itching occurred in paroxysms. After 10 days 

 a similar eruption appeared on the opposite side of the body. At first moderate 

 atypical fever was present. The animal recovered in 2i^ weeks. A certain simi- 

 larity of the complaint to moist eczema of the dog undoubtedly existed. (Hebrant, 

 Ann., 1905, 12). 



12. Pemphigus. 



{Blaseuaaschlag ; Dermatitis bullosa.) 



Pempliigus is an independent disease of the skin charac- 

 terized by large vesicles; in its acute form it passes on to re- 

 covery in a few weeks, in its chronic form on the contrary — 

 and ill the narrower sense of the word only this is designated 

 as true pemphigus — vesicular outbreaks recur several times, 

 which finally, however, end in recovery (Pemphigus vulgaris, 

 P. chronicus benignus), or the healthy epidermis fails to form 

 again on the constantly increasing diseased areas (P. chronicus 

 malignus, P. foliaceus). 



Occurrence. In animals, especially in horses (Demoussy 

 Dieckerhoff, Graffunder) and in cattle (Loiset, Lucet), excep- 

 tionally also in swine (Winkler) vesicular skin eruptions were 

 observed repeatedly, which always terminated in complete re- 

 covery in a comparatively brief space of time, and which for 

 this reason may be taken to correspond with pemphigiis acutus 

 of man, although it does not appear impossible that many cases 

 included herein have really been attacks of urticaria bullosa 

 or eczema bullosum. True pemphigus is undoubtedly an ex- 

 ceedingly rare disease in animals. 



Etiology. Of the causes of the disease nothing certain is 

 known. Its frequent occurrence occasionally appears to point 

 to an infection (Loiset saw it in cattle in the form of an en- 

 zootic). Bacteriological investigations hitherto conducted have 

 led to no positive result (Ballart saw^ one case of transmission 

 of the disease from a cow^, Dasch from a dog to man). 



