914 Herpes. 



due to a secondary species of microsporuin Audouini (Micro- 

 sporum caniniim). In this affection fairly nnnierons dissemi- 

 nated rounded or oval spots are formed, which are sharply cir- 

 cnmscril)ed and are 2 to 5 cm. in diameter. The spots are cov- 

 ered with numerous small, dry, gray scales ; the hairs break otf 

 in part, about 4 nnn. above the surface of the skin, the stumps 

 being split and surrounded with the gray sheaths. Other hairs 

 fall out entirely. Any hairs that may remain in the affected 

 portions may be removed easily and break off close to the sur- 

 face of the skin. The skin itself under the ringworm spots is 

 either quite normal or it often appears somewhat swollen, pain- 

 ful and on lateral pressure a reddish pus escapes from the 

 mouths of the hair follicles (Sabouraud, Suis & Suffran). Itch- 

 ing is not noticeable. Clinically as well as in respect to its 

 origin, the disease bears a close analogy to the tricophytia of 

 the scalp in children ("tondante rebelle"), but differs from 

 this in that the microsporosis of domestic animals generally 

 runs a rapid and benign course. 



(f) Herpes in the Cat. 



The cat is infected generally by diseased persons and dogs. 

 The head, the neck and front of the chest form favorite locali- 

 zations of the disease (Schindelka) ; the clinical appearances 

 coincide in general with those in the dog, and the disease usually 

 appears under the form of herpes tonsurans crustaceus. Maro- 

 tel has observed a case of microsporosis. 



(g) Herpes in the Fowl. 



In birds a few cases of herpes tonsurans have also been 

 seen which, according to Sabouraud, Suis & Suffran really be- 

 long to fowl scabies. The affection manifests itself by falling 

 out of the feathers at rounded spots through which the skin is 

 reddened and swollen, especially in the neighborhood of the 

 feathers, the quills of which are occupied by a mantle of wavy 

 fungous hyph[e, which only bear spores here and there. 



Diagnosis. The recognition of ringworm is generally quite 

 easy. The occurrence of more or less rounded, sharply defined, 

 gradually increasing spots, in the area of which may be seen 

 either short hair stumps and scales surrounded by sheaths or 

 asbestos-like crusts that are often bald or covered sparsely with 

 hair ; also the brittleness and looseness of the hairs immediately 

 surrounding the spots, together with the contagious character 

 of the affection, all furnish sufficient points of recognition; 

 moreover, the microscope may be employed for the demonstra- 

 tion of the fungus, although it is not always easy, especially in 

 the cases associated with suppuration or secondary inflamma- 

 tory changes, as well as in maculous spots. 



