732 



FAVTJ8. 



rather firm in consistence, becomes easily reduced to powder. 

 The smell of the scab is peculiar, and is compared to the urine 

 of a cat, or to a cage where mice have been kept Tliis is sup- 

 posed by Dr. Lowe to be due to a species of alcoholic fermeiitn- 

 tion (methylaminc), in connection "with tlie vej:;etable p'owth. 

 When a crust of recent formation is removed, a circular depres- 

 sion, wider and deeper tlian tlie fa^nis, is seen, and ai a moro 

 advanced stage the ulceration penetrates below the dermoid 

 tissue. 



" On examining tlie hairs which pass through tlio favus 

 crusts, it will be often found that they present their healthy 

 structure. At other times they evidently contain long-jointod 

 branches, similar to those in the crust, running in the long 

 axis of the hair, which is exceedingly brittle. There can be 

 very little doubt that the tubes and sporules, after a time, 

 completely fill up the hair folhcle, and thence enter the hair, 

 causing atrophy of its bulb, and the baldness wliich follows the 

 disease." — (Bexxett.) 



«(> 



!Flo. 146. — a, A light hair, containin^j branchen of the achonon 

 Schonleinii (magnified 300 diameters linear). The wood-cutter 

 has made the branches too beaded. 6, A dark -coloured hair, con- 

 taining branches of the plant. — (Bennett.) 



TreaJmeni. — The disease can ■ only be eradicated by "^ the 

 destruction of the parasitic growth, and as a rule this is not so 

 difficxilt to accomplish in the domestic animals as it seems to 

 be in man. 1 have, however, seen some very aggravated cases 

 in cats, but the severity of the disease was due more to neglict 

 than to any primary virulence. G^rrosive sublimate made 

 into an ointment with lard is recommended by M, St. Cyr. 

 Tlie iodine ointment seems to answer very well in this country, 

 but before it is applied, the scabs are to bo removed by washing 

 ftiBin woU with 6olt eoap and worm water. 



