232 Hounds 



infection. This shows how necessary it is for people 

 having mangy dogs to confine them within the pre- 

 cincts of their own premises, and not disseminate 

 an unwholesome complaint amongst the dogs of 

 neighbours. In some instances mange is associated 

 with neglect, and negligence is evidence of idleness, 

 and idleness is one of the greatest curses of mankind. 

 The other variety of parasitic mange is that known 

 as folUcular, or black mange, due to the invasion 

 of the hair folUcules and sebaceous ducts by acari, 

 known as Demodex folliculorum. Black mange is 

 not difficult to recognize, but it is a most intractable 

 malady, yet less infective than the sarcoptic variety. 

 Months often elapse before a cure is effected, and even 

 then it is not an easy matter to decide whether an 

 animal is completely cured or otherwise. Significant 

 features of the latter form of disease are that the dog 

 is more inclined to shake itself than scratch; the 

 skin becomes blackened, and of a deep slatish hue 

 in patches, and when squeezed the follicules either 

 suppurate or bleed. These are the essential clinical 

 features, but the diagnosis is necessarily based upon 

 the presence of the acari, as revealed by examination 

 with a low power of the microscope. The acari are 

 elongated in the body, whereas the sarcoptic acari 

 have a rounded body, and only four pairs of legs. 



Treatment and Management. — In every case of 

 mange it is advisable to make what may be vulgarly 



