118 



PARASITES OF THE DOMESTIC ANI]\L\LS 



Notoedres cati, var. cati (Sarcoptes minor var. cati, Fig. 71), the 



dwarf sarcopt, is a small species having the body nearly spherical. The 



dorsal folds of the integument are circular. The anus is dorsal. There 



are six anterior dorsal spinules and but twelve 



^ r 1 posterior. The arrangement of the stalked 



u \ j^ suckers is the same as in Sarcoptes scabiei. 



^ «|b^^ A<^ Course and Diagnosis. — Notoedric mange 



/^d^^^Hkfi^ of the cat usuall}^ begins about the ears and 



^^^^^^^^^ upper part of the neck, extending over the 



^^^^^^^^H forehead and then over the head generally. 



^^^^^^^^H As a rule it remains limited to these regions, 



^^^^^^^^^V"^ rarely passing to the body. The disease fol- 



y^^^H^^^^ lows the usual course and alterations of sar- 



f^^Ktl^^ \ Coptic mange, the cat giving evidence of the 



I / \ \ intense itching by frequently shaking the head 



/ \ \ and wiping it with its paws. In neglected 



I cases animals may become much emaciated 



Fig. 71.— Genus Notoedres. and may die in a few months. 



Due to the wrinkled, papular, and crusty 

 skin and its persistency of location upon the head, the diagnosis of 

 this mange on the cat is not difficult. Its differentiation from other 

 itching skm diseases may be made certam by the discovery of the para- 

 site, which is readily obtained in 

 material scraped from beneath the 

 crusts. 



Auricular Mange of the Cat. — 

 Auricular mange seldom occurs in 

 the cat. It is caused by the same 

 species of mite causing auricular 

 mange of the dog and is similar in 

 its symptoms and course. 



Scabies of the Rabbit 



Two species of scab mites afflict 



the rabbit, — Notoedres cati var. cuni- fig. 72.— Psoroptes communis var. 



■culi and Psoroptes communis var. cunicuii (from photomicrograph of 



.CUnicidi (Fig. 72), the latter CaUS- counted specimen, by Hoedt). 



ing auricular scabies or psoroptic otacariasis. 



In the rabbit notoedric mange most often has its beginning about the 

 nose, from which it extends to the upper part and sides of the head where 

 it remains localized. Its location, symptoms, and course are similar to 

 those of the same form of mange in the cat. 



Auricular scabies of the rabbit commences deep in the concha, grad- 

 ualty involving the skin of the entire inner side. Its presence is first 



