Sarcoptic Scabies. Acariasis in the Dog. 201 



peated application of any of the efficient acaricides would doubt- 

 less succeed. 



Prevention consists in avoiding the usual causes of contamina- 

 tion, of weakness, and debility, in good grooming, and in an 

 inunction with an anti-psoric ointment several times a year. 

 Crude tar is used, but occa.sionaIly causes asphyxia. 



SARCOPTIC SCABIES. ACARIASIS IN THE DOG. 



MANGE. 



Sarcoptic Scabies in dog ; two species of acari : 5". Scabei v. Canis ; .30 

 mm. long, communicable to man and probably to horse and pig, and 5. 

 Scabei v. Lupi on wolf, dog and man (crusted mange, Norwegian itch). 

 Harbors temporarily 5'. Minor v. Cati, S. Scabei v. Suis, and Trombidium 

 larva. Symptoms : Begins on head, eyes, muzzle, ears, from prey, paws, 

 breast, belly, back, rump ; papules, vesicles, intense itching, licking, rub- 

 bing, biting, scratching, abrasions, sores, crusts, cutaneous thickening, 

 wrinkling, pustulation, depilation, inappetence, emaciation, debility. Diag- 

 nosis : Intense itching, rapid spread, discovery of acarus. Treatment : 

 Clip ; green soap, alcohol and phenol, then acaricides : naphthalin, vaselin, 

 lavender oil, sulphur ointment, Peru balsam ointment. Burn litter ; clean, 

 scald kennel ; whitewash with acaricide. Prevention : Seclusion of mangy 

 dogs ; exclude from shows, hunts, etc. Scald clothing. 



The dog, like the pig, harbors two different sarcoptes which 

 give rise to what might be technically held to be two diseases, 

 Commoti Mange and the Mange of the Wolf. The acari are : 



1. Sarcoptes Scabei var. Canis, ovigerous female .30 mm., 

 male .20 mm. long. Zurn claims that this may cause scabies in 

 horse and pig as it has often done in man (Chabert, Grognier, 

 Viborg, Biett, Delafond, Gerlach, Frohner, etc). 



2. Sarcoptes Scabei var. Lupi a very much larger variety 

 found on wolves and dogs, was identified by Fuerstenberg as the 

 basis of the inveterate Norwegian itch of man, but Hebra denies 

 the correctness of this. It seems clear, however, that it may live 

 on man. In keeping with its larger .size it produces more exten- 

 sive local . lesions, with a more abundant exudate, which deter- 

 mines what is known as cru,sted mange. 



Still two other sarcoptes can live, at least temporarily, on the 

 dog, Sarcoptes Minor var. Cati, and Sarcoptes Scabei var. 



