The hygiene of transmissible diseases; their causation, modes of dissemination, and methods of prevention . alsthrough the employment of cultures of staphylococcus pyo-genes aureus. In man this organism is the cause of avariety of inflammatory conditions, notably boils, abscesses,phlegmons, osteomyelitis, meningitis, acute ulcerative endo-carditis, peritonitis, pleuritis, synovitis, etc. In fact, there ishardly an inflammatory condition in which it has not at onetime or anotiier played the etiological role. Those inflammations having a migatory or spreading ten-dency, though also sometimes due
The hygiene of transmissible diseases; their causation, modes of dissemination, and methods of prevention . alsthrough the employment of cultures of staphylococcus pyo-genes aureus. In man this organism is the cause of avariety of inflammatory conditions, notably boils, abscesses,phlegmons, osteomyelitis, meningitis, acute ulcerative endo-carditis, peritonitis, pleuritis, synovitis, etc. In fact, there ishardly an inflammatory condition in which it has not at onetime or anotiier played the etiological role. Those inflammations having a migatory or spreading ten-dency, though also sometimes due to the organism just men- SUPPURATIVE AND SEPTIC INFECTIONS. I 35 tioned, are more commonly characterized by the presence ofanother of the group of pyogenic bacteria—namely, strep-tococcus pyogenes (Fig. 15), identical in all probability withstreptococcus erysipelatis. This organism is characterized by its growth in chains—i. e., it divides transversely in one direction of space, thedaughter-cells having the tendency to adhere together likestrands of beads. It does not grow luxuriantly under arti-. FlG. 15.—Pus from erysipelas, showing presence of streptococcus pyogenes. ficial cultivation, its colonies ordinarily being hardly morethan very small points. Its growth is not accompanied bythe production of color. It does not liquefy gelatin, and intransparent fluid media does not cause diffuse clouding, butgrows rather in thread-like clumps that cling to the sides andsink to the bottom of the tube. It grows at ordinary room-temperature and at that of the body. It is not readily destroyedby drying, and has been detected on several occasions in thedust and in the air of hospital wards that have been occupiedby patients suffering from infections in which it was is killed in ten minutes by from 52° to 54° C. (Sternberg),It is conspicuous for the variability of its virulence. Culturesare rarely encountered, even in those fresh from diseased tis-sues, that exhibit ma
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