YEASTSANDMOlTLDS. 177 



tical with the above, forms dry yellow spots, usually on the chest 

 in persons suffering from wasting diseases. 



Aspergillus Glaucus. 



Origin. In saccharine fruits. 



Form. The hypha has formed upon its further end a bulb, 

 from which pear-shaped sterigrnata arise and bear upon their 

 ends the conidia or spores. 



Growth. Best upon fruit juices. Non-pathogenic. The mould 

 is green. Aspergillus flavus has the tufts and spores of a yellow 

 color. 



A. Fumigatus, Is pathogenic for rabbits when injected into 

 them. At the autopsy their viscera are found filled with the 

 mould. 



Examination of Yeasts and Moulds. Yeasts and moulds are 

 best examined in the unstained condition. A small portion of 

 the colony rubbed up with a mixture of alcohol and a few drops 

 of liquor ammonia ; of this, a little is brought upon the glass- 

 slide covered with a drop of glycerine and the cover-glass pressed 

 upon it. If the preparation is to be saved, the cover-glass is 

 secured by ringing around the edges. Yeasts take methylin-blue 

 stain very well. 



Cladothrices and Streptothrices. The streptothrix and 

 cladothrix groups are classed with the higher bacteria, but 

 their exact status is still undetermined. They may be consid- 

 ered as representing the transition from the bacteria to the 

 lower fungi. 



Streptothrix, or Cladothrix Actinomyces (ray fungus). 

 Actinomycosis is a disease caused in man and cattle by this 

 organism, which is commonly found in grain, particularly 

 barley. It is probable that several varieties of the parasite can 

 produce the characteristic lesions. It has been discovered in 

 all countries and in various organs of the body, although its 

 place of election is about the lower jaw, where it tends to form 

 hard ulcerating abscesses, affecting other organs secondarily. 



Form. In the granular masses of an abscess cylindrical fila- 

 ments are matted together, and radiating outward from this 

 zone are club-shaped branches, as the petals of an aster. In the 

 center of the granule are numerous cocci-like bodies, and some 

 12 



