. A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians. Bacteriology; Pathogenic bacteria; Protozoa. 38 Structure and Classification of Micro-organisms There seems, however, no adequate ground for this arrangement, and the old genus Actinomyces should be kept. Eppinger found a streptothrix in the pus of a cerebral abscess, and Petruschky, Berestneff, Flexner, Norris, and Larkin have found streptothrices in cases of pulmonary disease simulating tuberculosis. The organisms described by these writers were not identical, so that there are prob- ably several
. A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians. Bacteriology; Pathogenic bacteria; Protozoa. 38 Structure and Classification of Micro-organisms There seems, however, no adequate ground for this arrangement, and the old genus Actinomyces should be kept. Eppinger found a streptothrix in the pus of a cerebral abscess, and Petruschky, Berestneff, Flexner, Norris, and Larkin have found streptothrices in cases of pulmonary disease simulating tuberculosis. The organisms described by these writers were not identical, so that there are prob- ably several different species. They usually grow well upon ordinary media and upon solid media form whitish, glistening, well- circumscribed colonies attaining a diameter of several millimeters. As they grow old they turn yellowish or brownish. They liquefy gelatin. Some of the cultures were not harmful to the laboratory animals, others caused suppuration. Actinomyces.—The chief characterization of the organisms of this group is a clavate expansion of the terminal ends of radiating fila- ments. These are seen in sections of diseased tissues containing the organisms, but rarely are well shown in the artificial cultures. For further particulars of these organisms see Actinomyces bovis, etc. THE YEASTS, OR BLASTOMYCETES The organisms of this group are sharply separated from the bacteria by their larger size, elliptic form, and by multiplication by gemmation or Fig. 7.—Blastomycetes dermatitidis. Budding forms and mycelial growth from glucose agar. (Irons and Graham, in "Journal of .Infectious Diseases".) Each organism is surrounded by a sharply defined, doubly contoured, highly refracting, transparent cellulose envelope. Com- monly each cell contains one or more distinct vacuoles. When multiplication is in progress, smaller and larger buds are Please note that these images are extracted from scanned page images that may have been digitally enhanced for readab
Size: 1888px × 1324px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbacteri, bookyear1916
