. A text-book of bacteriology; a practical treatise for students and practitioners of medicine. Bacteriology. HYPHOMYCETES 643 studied later, by Sabouraud.^ The fungi consist of finely interlaced narrow septate mycelia, within which characteristic swellings appear. From these swellings, chlamydospores develop. Hypha, both aerial and deep, grow out of the mycehal threads, on the ends of which ascospores may develop. In the diseased skin, the fungi grow chiefly within the hair sheath, causing an area of secondary inflammation about the base of the hair. The infection probably begins first in the
. A text-book of bacteriology; a practical treatise for students and practitioners of medicine. Bacteriology. HYPHOMYCETES 643 studied later, by Sabouraud.^ The fungi consist of finely interlaced narrow septate mycelia, within which characteristic swellings appear. From these swellings, chlamydospores develop. Hypha, both aerial and deep, grow out of the mycehal threads, on the ends of which ascospores may develop. In the diseased skin, the fungi grow chiefly within the hair sheath, causing an area of secondary inflammation about the base of the hair. The infection probably begins first in the epidermis sur- rounding the hairs, from which it then spreads into the hair bulb and thence grows up into the substance of the hair in which mycelial threads. Fig. .152.—Achorion Schoenleinii. Section of favus crust. Stained by- Gram. (After Fraenkel and Pfeiffer.) and spores develop in large niunbers. The demonstration of the micro- organism from a case can easily be accomphshed by epilating an af- fected hair, making sure that the hair bulb has been removed. This is then immersed imder a cover-slip in a drop of sodium hydrate or potassium hydrate solution and examined under the microscope. In this way enormous numbers of short mycelial threads and spores may be seen to he within the bulb. Many varieties of these fungi have been described from different cases. Their interrelationship is not entirely clear. In general, a division is made between those which develop large spores and a more common small-spored variety. 1 Sabouravd, Ann. de dermat. et de syph., 3, 1892, and 4, 1893,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hiss, Philip Hanson, 1868-1913; Zinsser, Hans, 1878-1940. joint author. New York and London, D. Appleton and Company
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