Dermatozoa. 47 



All have found that the most important accessory to such local 

 treatment was the advent of cold weather. 



As a constitutional treatment, Western advocated tonics. 

 Fayer, and later Bitting, claim a large measure of success from 

 the administration of iodide of potassium until the system is 

 thoroughly saturated. In other hands and during the monsoons 

 the iodine treatment has been fruitless. 



If the recurrence of the disease year after year in the same 

 horse, in non-bursatti districts, is due to the hibernation of the 

 spores in leucocytes, this would be a strong argument for the 

 thorough destruction of the bursatti nodule by caustic, iodine and 

 otherwise, at the earliest possible stage, before time has been 

 'allowed for much or any spore formation. 



DERMATOZOA. 



Coccidium oviforme : in epidermic cells, as round protoplasmic body, ac- 

 quires outer coat, bursts epidermic cells, becomes segmented, sporulated, 

 and finally falciform. Pathogenic to poultry, turkeys, pigeons. Symptoms : 

 Unfeathered parts of head, etc., form wart-like nodules, grain-like, yellow. 

 In pigeons, umbilicated, suppurating, ulcerating, fcEtid. May dry, disinte- 

 grate, desquamate, heal. May cause ansemia, emaciation, mirasmus, death. 

 In rete Malphigii, follicles, gland ducts. Contagious directly and indirectly. 

 Treatment : Caustic, oil of turpentine, oil of tar. Disinfection of buildings. 



Cutaneous Coccidiosis. (Psorospermosis.) Molluscum 

 Contagiosum. Epithelioma Contagiosa. Poultry, turkeys, 



pigeons. 



Coccidia Oviformes : Live mainly in the epidermic (else- 

 where epithelial) cells. First, small round protoplasmic masses, 

 usually nucleated. These encrease in size, acquire a cyst or shell, 

 and burst open the epithelial cell-hosts, escaping to the epithelial 

 intervals. Then they become segmented, their protoplasm con- 

 densed and then divided into several spheroids (spores). Kach 

 spore divides into several falciform corpuscles, which invade 

 new epithelial cells and repeat the above transformations. 



Symptoms : Attack especially the head, beak commissures, 

 nostrils, eyelids, auditory meatus, comb, barbs. Form oblong, 

 salient, wartlike nodules, sulphur yellow, in size from a linseed 

 to maize grain. In pigeons attack head, lower surface of neck 



