SARCOPTIC SCABIES IN THE OX. 



Sarcoptic scabies, rare : Psoroptic scabies : Psoroptes communis v. bovis, 

 like that of horse. Symptoms: Intense itching on rump, thighs, neck, 

 chine, back, head, shoulders, side, rubbing, scratching, licking, depilation, 

 excoriation, bleeding, exudation, scabbing, swelling, vesicles, acarus in crusts. 

 Favoring conditions as in sarcoptes in horse. May, in great part, sub- 

 side in summer to reappear in winter. Treatment : As in horse, only avoid 

 mercury. Prevention : As in sarcoptic scabies in horse. Symbiotic scabies : 

 Symbiotes scabei v. bovis : Symptoms : Itching and eruption on rump, with 

 little extension, baldness, scabs, cracks, abrasions, sores, etc., along back, 

 in groin, on pasterns, chronic. Treatment : As for psoroptes ; dressings 

 limited to affected area. 



Isolated cases of sarcoptic scabies communicated from the horse 

 are reported by Grognier and Fauvet, and others from the goat 

 by Wallraff, but the affection is so rare that it may be virtually 

 ignored. Cases of this kind may be treated as in the horse. 



PSOROPTIC SCABIES IN CATTLE. DERMATODECTIC 

 (DERMATOCOPTIC) MANGE. 



This is the most common form of mange in cattle as it is in 

 the horse. The essential cause, the psoroptes communis var. 

 bovis does not differ in appearance from that of the horse, and 

 it is mainly in its adaptability to live on the bovine rather than 

 the equine animal that the distinction can be made. Gerlach and 

 Delafond each failed to transfer the psorptes from horse to ox, and 

 Gohier and Miiller equally failed in attempts to convey that of 

 the ox to the horse). Exceptions to this are probably mistakes. 



Symptoms. Most commonly the first symptoms are seen at 

 the root of the tail and sides of the thighs ; soon the neck, chine, 

 back, head, shoulders and sides are involved, while the lower parts 

 of the limbs escape until later. There is insufferable itching for 

 which the patient rubs, scratches and licks himself incessantly, 

 and hastens not only the loss of hair but the formation of ex- 

 coriations, bleeding, exudation liquid effusion and swelling, 

 The exudation concretes into gfayish white crusts, easily reduced 

 to powder and showing beneath them abrasions and cracks. 

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