EUROTIini ASPERGILLUS. 



123 



formation of which corresponds with the general descrip- 

 tion given above, appear to the naked eje as brightly 

 refracting, very small, round granules ^ j mm. in 

 diameter, arising from the aerial mycelium, which is of a 

 sorrel colour in this stage of fructification. 



Eurotium aspergillus glaucus. Bluish-green or 

 yellowish-green ; heads regularly round. Conidia round, 

 warty or knobby ; 9 15 p, in diameter. It occurs in 

 fruit juice, moist wood, frequently on damp walls, but 

 only in very cool places about 10 12 C. 



Eurotium rcpens. At first white, ultimately dark 

 green ; heads often fringed ; conidia oval, smooth, 

 colourless or greyish-green, 5 8*5 p in largest 

 diameter. Occurs on preserved fruits, bread, &c. ; the 

 best temperature is 10 15 C. 



The aspergilli have of late excited special interest Pathoge 

 because some of them (Asp. fumigatus, Asp. flavus, 

 and Asp. niger) are able to grow in the bodies of warm- 

 blooded animals. 



This pathogenic property was first ascertained by Action of 

 studying the result of the injection of mixtures contain- 

 ing spores into the blood 

 stream of animals, es- 

 pecially of rabbits. When 

 the number of spores 

 injected was ver} 7 large 

 the animals died in a few 

 d ays, and numerou s small 

 deposits of fungus my- 

 celium which had de- 

 veloped from the spores 

 were found in the in- 

 ternal organs. If smaller 

 quantities of spores were 

 employed, the animals 

 lived, but if they were 

 killed after two or three 

 days a small number of 

 mycelial deposits were 



spores. 



Fig. 15. Microscopical section 

 from the kidney of a rabbit 

 killed 36 hours after the 

 injection of spores. (After 

 Grawitz.) 



found ; at later periods these had disappeared, so that when 



