. Special pathology and therapeutics of the diseases of domestic animals. Veterinary medicine. 62 Swine Erysipelas. a red blood corpuscle, Fig. 20). In bacilli grown in cultures fine Gram-positive granules may be demonstrated which are considered by Fedorowitsch and by Eosenbach to be lasting forms (protospores). Staining. They stain readily with aqueous aniline dyes as well as by Gram's method. Cultivation. The bacilli grow well on the ordinary artificial media with the exception of potato. It is aerobic as well as anaerobic and grows in cultures some- times as long rods or curved threads. On
. Special pathology and therapeutics of the diseases of domestic animals. Veterinary medicine. 62 Swine Erysipelas. a red blood corpuscle, Fig. 20). In bacilli grown in cultures fine Gram-positive granules may be demonstrated which are considered by Fedorowitsch and by Eosenbach to be lasting forms (protospores). Staining. They stain readily with aqueous aniline dyes as well as by Gram's method. Cultivation. The bacilli grow well on the ordinary artificial media with the exception of potato. It is aerobic as well as anaerobic and grows in cultures some- times as long rods or curved threads. On gelatin plates the cultures form whitish, cloudy, very fine flakes with coarse granular centers, which spread out towards the periphery, into a delicate thready meshwork. More rarely they form bright shiny, branching small colonies, whereas in stabs pinhead sized, white points develop in 2 to 3 days which later fuse into grayish-white, cloudy colonies, from which fine horizontal radiating branches run in all directions of the gelatin (test tube-brush shape. Pig. 21). On agar and on blood serum the bacillus forms very fine punctiform, dew-drop- like colonies. Bouillon is made slightly cloudy, while latfer a fine, flaky sediment forms on the bottom of the Fig. 20. Bacilli of smne erysipelas. Smear prepared from blood of a Gram-eosin staining. Fig. 21. Gela- tin stab culture of swine ery- sipelas bacilli. Tenacity. The ery- sipelas bacilli manifest con- siderable resistance towards harmful influences, which they probably owe to a wax- like capsule (Schiitz & Voges). Drying kills them only gradually as they re- main alive when subjected to a temperature of 37°C. for 31, and to direct sun- light for 12 days (Sirena & Alessi). Heating to 70°C. destroys them in about 5 minutes. Pieces of meat not over 15 cm. thick require 2% hours boiling for a complete sterilization (Stadie). Putrefaction does not destroy the bacilli in meat in 4 months (Stadie). Salting and
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectveterin, bookyear1912