6 CIRCULAR 338, TJ. S. DEPT. OF AGRICULTURE 



succumb to the toxic effects of such anthelmintics as chenopodium 

 than are animals without such complications as mange. 



In connection with treatment, one must remember that the premises 

 used by mangy dogs are infected and that disinfection is therefore 

 necessary. So far as possible, litter of all sorts should be burned. 

 Kennels and other constructions should be thoroughly cleaned and 

 then disinfected with hot, strong coal-tar disinfectants. 



FELIXE SARCOPTIC OR NOTOEDRIC MAXGE 



Cause. — Sarcoptic or notoedric mange in cats is due to the presence 

 of a mite, Notoedres cati, which is smaller than the sarcoptic mite of 

 dogs; it may be distinguished on microscopic examination from the 

 sarcoptic mite of the dog by reference to figure 2. This form of 

 mange is transmissible to dogs, and tins possibility 

 should be kept in mind where dogs and cats are 

 associated. This type of mange is also communi- 

 cable to man. 



Symptoms. — The mites usually attack the skin 

 of the neck, ears, and face, and in severe cases the 

 entire head and neck may be affected. The initial 

 lesion is in the form of a small vesicle which is 

 about the size of a pinhead. The vesicles later 

 become confluent and crusts are formed. The hair 

 figure 2.— The feime sar- becomes matted and may fall out. Itching varies 

 toFdres m cm e m Femaie" in intensity in individual animals. As the disease 

 fS 1 V GedoeIt nlar i § 922' progresses the animal presents a dejected appear- 

 after Megnic. (Micron ance, and death may occur in from 4 to 6 months. 

 u5^5?ioJSW i2ot e o In dogs this type of mange is confined usually to 



125 wide; female, 245 to f\\p, haoc\ 



280 long by 165 to 175 LlieiiedU. , 



wide.) Treatment. — Coal-tar preparations and other 



preparations containing phenol should not be used 

 in the treatment of mange in cats, as cats are particularly susceptible 

 to poisoning with such compounds. An ointment composed of 1 part 

 sulphur to 8 parts lard or equal parts of olive oil or cottonseed oil has 

 been found effective in many cases. Helmerich's ointment, composed 

 of sublimed sulphur 150 grams, potassium carbonate 8 grams, and lard 

 60 grams, has been recommended. A mixture of balsam of Peru 1 dram, 

 and sulphur ointment 1 ounce, may be used but care should be taken 

 not to apply this preparation over too extensive an area of the skin, 

 as poisoning may result. As in the case of dogs, the hair should be 

 slipped over the affected areas and the scales softened with green 

 coap before the application of mange remedies. 



EAR MANGE 



Cause. — Ear mange is due to a mite, Otodectes cynotis, which is 

 slightly larger than the canine sarcoptic mite. Owing to their size 

 and the fact that they do not burrow, it is often possible to see these 

 mites (fig. 3) with the naked eye, either in the ear or in detritus 

 removed from the ear, the mites appearing as small white objects 

 moving slowly about. 



