Medical and surgical report of the Presbyterian Hospital in the City of New York . ethroughout the drop, only those around the edges of the drop developto any considerable extent. The growth takes place outward fromthe edge of the drop along the moist surface of the glass. Here all stagesof growth may be seen, from the elongated spore to the fully developedbranching organism. The spore sends out a delicate sprout whichvery early looks like a bacillus with a bulbous extremity. The sproutsoon branches, and the growth proceeds rapidly with frequent branchingin all directions. Slight clubbing of t
Medical and surgical report of the Presbyterian Hospital in the City of New York . ethroughout the drop, only those around the edges of the drop developto any considerable extent. The growth takes place outward fromthe edge of the drop along the moist surface of the glass. Here all stagesof growth may be seen, from the elongated spore to the fully developedbranching organism. The spore sends out a delicate sprout whichvery early looks like a bacillus with a bulbous extremity. The sproutsoon branches, and the growth proceeds rapidly with frequent branchingin all directions. Slight clubbing of the ends of the branches is oftenseen, but generally the ends are not club-shaped. In a few stainedspecimens an extremely delicate, almost colorless, clubbed-shaped STREPTOTHRIX INFECTION. 159 Structure was seen at the ends of the branches. This appearance wasnot constant, and possibly was produced artificially. It can be seenin some of the photographs. The development of the spores was not so easily growth upon potato differs from the growths on other media not. Fig. V—Streptothrix tubercle showing the threads. only in color but also in consistency. Instead of being tenacious anddifficult to separate, it is finely granular and is easily pulverized. Inspecimens taken at frequent intervals from potato-cultures the threadsbecome more and more broken up into short fragments, and the numberof free spores increases very rapidly. Some of the fragments appear tohave a spore at each end, and some have three or more spores. Thefree spores show no regular arrangement, but occasionally a short chainof five or six can be founrl. By planting the threads upon minute bits l6o STREPTOTHRIX INFECTION. of potato upon a slide kept in a moist chamber it was possible in a fewinstances to observe the manner of sporulation. The ends of thebranches appeared to break up into chains of cocci with very littleevidence of a covering. Sometimes they preserved the line of thethread, but ver
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