1044 



FUNGI IMPERFECTI 



herbivora or in omnivorous man, though they are known in the 

 grass-eating dog, but are rare in other carnivora. Their geographical 



distribution appears to be world wide. 



With reference to their method of 

 entry into the human body, it appears to 

 be often associated with some slight 

 I traumatism with some vegetal substance, 



^ - such as a thorn, while the best treatment 



is undoubtedly complete removal wherever 

 possible; still, partial extirpation, associ- 

 ated with treatment by iodide of potash, 

 as first advocated for this purpose in 1885 

 by Tomassen, but in large doses such as 

 90 grains per diem, as used by Carroll with 

 success in 1905, is sometimes also capable 

 of effecting a cure. 



Morphology. — Mycelial filaments of 

 % . various sizes, but generally very thin 



J I ' (i or less), often branching, non-septate, 



and without differentiated nuclei. In 

 certain species during parasitic life some 

 .;7if;:7™T?'' myceUal threads terminate in club-like 



yom^a TO SHOW ArTHRO- r 11 T 1 



SPORES. formations and show a radial arrange- 



ment. It is doubtful whether these club- 

 like formations are intrinsic parts of the fungus or partly products of 

 reaction of the invaded tissues. Masses of mycelia may form in the 



Fig. 550. Fig. 551. 



Fig. 550. — Nocardia convoluta to show Easy Culture and Limited Growth 

 ON Sabouraud's Preservative Medium. 



Fig. 551, — Nocardia convoluta to show Easy Culture on Inspissated 



Blood Serum. 



