. A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians. Bacteriology; Pathogenic bacteria; Protozoa. 336 Suppuration Under certain conditions the wandering of tlie processes can b^ directly observed under the microscope. It depends not only upon the culture-medium, but, in part, upon the culture itself. Entire groups of bacilli or single threads, by gradual extension and circular movement, detach themselves from the colony and wander about upon the plate. From the radiated central part of the colony peculiar zooglea are formed, having a sausage or screw
. A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians. Bacteriology; Pathogenic bacteria; Protozoa. 336 Suppuration Under certain conditions the wandering of tlie processes can b^ directly observed under the microscope. It depends not only upon the culture-medium, but, in part, upon the culture itself. Entire groups of bacilli or single threads, by gradual extension and circular movement, detach themselves from the colony and wander about upon the plate. From the radiated central part of the colony peculiar zooglea are formed, having a sausage or screw shape, or wound in spirals like a corkscrew. The younger colonies, which have not yet reached the surface of the gelatin, are more compact, rounded or nodular, later covered with hair-like projections, and becomiilg radiated like the superficial ; If the culture-medium be concentrated, or the culture have been frequently transplanted, the phenomenon is less marked or may not occur. Bouillon.—^In this medium the organism grows rapidly, and - quickly clouds the fluid. A pellicle soon forms upon the surface and a mucilaginous sediment occurs / Fig. -Swarming islands of proteus bacilli on the surface of gelatin; X 650 (Hauser). Gelatin —Puncture cultures in gelatin are not char- acteristic. A stocking-like liquefaction occurs and extends so rap- idly that the entire medium is liquefied in a few days. Anaerobic cultures do not liquefy. Agar-agar.—Upon agar-agar the bacillus forms a moist, thjn, transparent rapidly extending layer which rarely reaches the sides of the tube. Upon agar-agar plates ameboid movement of the colonies sometimes occurs. Potato.—Upon potato the growth occurs in the form of a smeary patch of soiled appearance. Milk is coagulated and peptonized. Metabolic Products.—^The bacillus rapidly decomposes pro- teins, albumen, fibrin, blood-serum and gelatin. According to. Please note that these images are extracted from
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbacteri, bookyear1919
