1 84 



xii. Acliiioniycosis. 



Recently many cases of equine actinomycosis have been 

 reported. Maile, 1888, found in the scrotum of a horse, sar- 

 comatous clianges, in which Rivolta has found actinomyces-like 

 micro-organisms. Leblauc and Baranski, 1888, found it in the 

 intermaxillary gland, Perro7!cito, 1890, at the patellar region of 

 the horse, and Hamburger , 1889, noted osseous actinomycosis of 

 the horse. Although we have not yet found it in our horses, yet 

 we must bear in mind these statements. Differentiation may be 

 possible in the same way as in bothriomycosis. 



xiii. Tumors and parasitary nodules of 

 skin and subcutis. 



Here for differential diagnosis may be mentioned metastatic 

 tumors, especially sarcom, melanosarcom (in intermaxillary 

 gland), carcinom, fibrom, lymphadenom (especially in intermaxil- 

 lary gland), fibroma verminosum [Spiroptera retiatlata), which is 

 sometimes met with in Japanese horses at the saddle region, 

 m5'iasis, car fistule, cholesteatom at the false nostril, &c. 



xiv. Exanthemata as Ec.':cma, Urticaria, 

 Pemphigus, Impetigo, &c. 



Take generally an acute course. 



XV. Adenitis equornm and its complications as the 

 catarrh of guttural pouches, sinus, &c. 



These are liable to be confounded with nasal saccharomj'- 

 cosis. But by experience we know tliat nasal saccharomycosis 

 without cutaneous changes is an exception. Besides glandular 

 swelling in the case of strangles is extensive and mostly turned 

 to a big abscess. 



xvi. Dermatitis contagiosa Canadeiisis pustnlosa. 



Acne contagiosa eqnortim or Canadean horse pox is an acute 

 infectious exanthem of the horse characterized by eruption of 

 pustules in the skin of back and thorax, more especially on the 

 saddle and scapular region ; the pustules dry up and are trans- 

 formed to a thick yellow crusts which afterwards detach toge- 

 ther with hairs, and the ulcers, thus left behind, heal without 



