. A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians. Bacteriology; Pathogenic bacteria; Protozoa. Streptococcus Pyogenes 317 is Staphylococcus citreus of Passat.* As it is not common and is doubtfully pathogenic, it is of much less importance than the pre- viously described organisms. Streptococcus Pyogenes (Rosenbach) General Characteristics.—The streptococcus is a non-motile, non-flagel- late, non-sporogenous, non-liquefying, non-chromogenic, aerobic and optionally anaerobic, spheric organism, infections for man and the lower animals. It stains by
. A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians. Bacteriology; Pathogenic bacteria; Protozoa. Streptococcus Pyogenes 317 is Staphylococcus citreus of Passat.* As it is not common and is doubtfully pathogenic, it is of much less importance than the pre- viously described organisms. Streptococcus Pyogenes (Rosenbach) General Characteristics.—The streptococcus is a non-motile, non-flagel- late, non-sporogenous, non-liquefying, non-chromogenic, aerobic and optionally anaerobic, spheric organism, infections for man and the lower animals. It stains by ordinary methods and by Gram's method. In 1880 Pasteurf first cultivated streptococci from the blood of patients suffering from puerperal fever. In 1881 Ogstonf called attention to the fact that two distinct kinds of cocci were to be found in pus, mentioning both staphylococci and streptococci. The. Fig. 105.—Streptococcus pyogenes, from the pus taken from an abscess. X 1000 (Frankel and Pfeiffer). beginning of real knowledge of the streptococci, however, dates from the time of their isolation and cultivation by Fehleisen§ and by —Streptococci are parasitic pathogenic organisms, not known apart from human and animal hosts. They seem to occur not infrequently, in health, upon the surface of the body, in its various openings and in the aUmentary canal. Such organisms are to be regarded as potentially virulent and pathogenic in all cases. They are the primary infecting agents in many inflammatory, * "Untersuchungen iiber die Aetiologie der eitrigen Phlegmone des Menschen," Berlin, 1885, p. 9. t de la societe de biologie de Paris, 1880, xc, p. 1035. t "Brit. Med. Jour.," March, 1881, p. 369. § "Aetiologie des Erysipels," Berlin, Fischer, 1883. II "Mikroorganismen bei Wundinfektionskrankheiten des Menschen," 1884, p. Please note that these images are extracted from scanned page images that
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