PNEUMONO-MYCOSIS 571 



The asci occur as golden-yellow bodies in the mycelium. It forms 

 conidiophores which are unbranched and are swollen at the tip. 

 Short unbranched stalks (sterigmata) grow on this swelling and 

 on the tips of these the spores develop. A process of sexual 

 reproduction occurs very like the one observed in Penicillium. 

 Aspergillus niger grows well on the ordinary laboratory media, 

 producing on potato a powdery, sooty growth after a time. Asper- 

 gillus glaucus is a common green -spored species. 



With the exception of the ringworm and allied fungi, 

 which produce parasitic skin affections, the Hyphomy- 

 cetes are not of great pathological importance. In 

 the ear and nose mucors and aspergilli may be met with, 

 but in these situations they are epiphytes rather than 

 parasites, and the same species occur in bronchiectases and 

 pulmonary vomicse. Occasionally, however, a pneumono- 

 mycosis has been met with, the mycelium of the fungus 

 ramifying in the lung tissue and setting up irritative 

 and other changes. " Pneumono-mycosis " or " pul- 

 monary aspergillosis " is especially a trade disease among 

 bird-rearers. Grain is taken into the mouth and the bird 

 is fed with it, and in the course of this operation the mould 

 spores are inhaled. The course of the disease is much 

 like chronic bronchitis or pulmonary tuberculosis. The 

 species met with in this condition seems generally to have 

 been the Aspergillus fumigatus. 



The Maduramycoses, as already stated (p. 545), are 

 due to various fungi, one of them to an Aspergillus (p. 556). 



Sporotrichosis l 



A rare disease clinically resembling syphilis or tuber- 

 culosis, characterised by indurated granulomata like 

 gummata, which subsequently break down, suppurate and 



1 See Walker and Ritchie, Brit. Med. Journ., 1911, vol. ii, p. 1 ; Gougerot, 

 Journ. of State Med., xxi, 1913, pp. 614 et seq. 



