101 



Hebrant & Antoine. Sur I'otite parasitaire du chien et du chat. 

 [On parasitic Otitis of the Dog and Cat.]— 47</(. Med. Yit. 

 Brussels, no. 5, May 1913, pp. 261-26-3. 



The parasite of this disease has received various names : — 

 Sarcoptes cynotis; Symhiotes auricularum; Chorioptes ecaudatiis, 

 Raillet; Otodectes cynotis, Gedoelst; Dermatophagus auricularis, 

 Marek. 



Amongst the numerous cases observed at the clinique of the 

 Ecole Veterinaire de L'Etat in 1912, sixteen occurred in the cat 

 and three in the dog. Cadiot and Breton have already noted 

 that this is especially a disease of sporting dogs. The symptoms 

 are those of ordinary auricular catarrh, but the ear is not quite so 

 tender to the touch. The authors say that diagnosis is quite 

 easy if a little of the cerumen be examined under the microscope 

 after the addition of a drop or two of a 10 per cent, solution of 

 caustic potash ; the parasites become visible, and even with the 

 naked eye small grayish white points can be seen which indicate 

 their presence. The malady is contagious and it is exceedingly 

 desirable to isolate the animal attacked and to disinfect the 

 kennels. 



Any parasiticide is useful as a curative agent, and the authors 

 have found the following washes satisfactory : — warm soapy 

 water; a 2 per cent, solution of cresyl; a 1 per cent, solution of 

 potassic sulphide; a 2 per cent, solution of salicylic acid in 

 alcohol ; also a solution of naphthol in alcohol ; not to mention 

 various well-known antiseptic powders. They themselves prefer, 

 however, a 10 per cent, solution of tincture of iodine in glycerine, 

 or a 1 per cent, solution of liquid carbolic acid in linseed oil. 

 The advantage of both these remedies is that they render 

 mechanical manipulation unnecessary. 



BiSHOPP (F. C.) & King (W. V.). Additional Notes on the Biology 

 of the Rocky Mountain Spotted-fever Tick. — Jl. Econ. Entom., 

 vi, no. 2, April 1913, pp. 200-211. 



Rocky Mountain spotted fever exists in its most virulent form 

 in the Bitter Root Valley, Montana, where TO to 80 per cent, of 

 the cases prove fatal. Although the disease does not occur in 

 all the territory infested by Dermacentor veiiustus, it is also 

 known in Alaska, Washington, Oregon, Idaho, California, 

 Nevada, Utah, Wyoming, and Colorado, and it probably occurs in 

 British Columbia. 



The adult tick is, with rare exceptions, the only stage which 

 attacks man. The first appearance of the adults occurs shortly 

 after the first warm days of early spring, and they are most 

 numerous in April and May. 



During June the number rapidly diminishes, so that by the 

 first of July very few remain attached to hosts. Towards the latter 

 part of summer, the adults begin leaving the plants upon which 



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