44 MANUAL OF EQUINE MEDICINE. 



Tinea Tonsurans is due to the growth of Trichophyton 

 Tonsurans, and Tinea Favus to Achorion Schlonleinii. Bur- 

 satee is similarly due to the growth of one of these moulds, 

 as also is Actinomycosis and the ' Madura foot ' of India. 

 The mould causing Bursatee has been described by Mr. F. 

 Smith, of the 12th Royal Lancers, in the Veterinarij Journal 

 for July, 1884.^ 



The Actinomyces, the vegetable fungus of Actinomycosis, 

 is of recent discovery, though even so long ago as the year 

 1872 the late Mr. D. Gresswell expressed his belief that 

 many of the indurations of a certain character met with in 

 the tongues of oxen, and variously described as schirrhous 

 and tubercular, were due to the invasion by a ' vegetable 

 mould.' With this view, accordingly, he treated them with 

 the injection of sulphurous acid, and sometimes of carbolic 

 acid or tincture of iodine. 



"''■ Mr. Smith writes : ' The actual exciting cause of Bursatee is a 

 mould fungus. I have found it in every fresh specimen of the sore that 

 I have examined. . . . The filaments or hyphse are branched not 

 septate, -2 o Jo o o^ ^^^ i^^h wide and so long that they cannot be followed 

 as they pass in and out of the tissue. ... I have lately produced typical 

 Bursatee ulcers by inoculation with portions of the tumour, and am at 

 l^resent working this out, and endeavouring to produce the sore from 

 the cultivated moulds.' 



