162 



MEDICAL BACTERIOLOGY 



ture and arrangement is discernible when examined unstained with a low-power 



lens (% to ^6 objective). 



Molds, hyphomycetes or eumycetes are all alike and differ from the algae 



in that they (the molds) do not possess chlorophyl. 



Pathogenic hyphomycetes belong to one of three classes: 



First. Fungi Imperfect! To this group is relegated all forms not 



thoroughly studied and those which do not belong to either of the other two 



classes. Fungi imperfecti includes most of the pathogenic molds. 



MOLDS, HYPHOMYCETES OR EUMYCETES 



Phycomycetes Mycomycetes 



Hyphae or mycelia show no partitions, en- Hyphae or Mycelia show partitions, 

 tire meshwork of a single organism consist- 

 ing of one multinucleated cell. 



Reproduction sexual and asexual, no defi- Reproduction usually asexual, only definite 



nite basidium or ascus. basidium or ascus. 



Mucor 



Mucor Mucedo 

 Mucor Pusillus 

 Mucor Corymbifer 



Aspergillus 



A. Subflavus 

 A. Fumigatus 

 A. Flavus 

 A. Niger 

 A. Concentricus 

 A. Albus 



Penicillium 



P. Galucum 

 P. Crustaceum 



FIG. 32. MUCOR CORYMBIFER. (From Plant after Lichtheim.) 



Asperigillus fumigatus has been found in inflammatory conditions of the 

 upper air passages and in the sputum of persons suffering with pulmonary dis- 

 ease simulating tuberculosis. 



