The Journal of Experimental Medicine, Vol 35, 699-701,
Copyright, 1922, by The Rockefeller Institute for Medical Research New York
STUDIES ON THE PNEUMOCOCCUS
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III. DISSOLUTION OF PNEUMOCOCCI IN PNEUMONIC CELLULAR MATERIAL AT VARYING HYDROGEN ION CONCENTRATIONS. RESISTANCE OF CERTAIN OTHER ORGANISMS TO DISSOLUTION.
Frederick T. Lord M.D.1 and
Robert N. Nye M.D.1
1 From the Research Laboratory of the Massachusetts General Hospital, Boston.
Pneumococci of Types I, II, and III undergo dissolution when mixed with cellular material from the pneumonic lung at a pH of 6.95 and 5.5, but not at a pH of 4.5. An enzyme derived from the bacteria themselves or from the cellular material may be the cause of the dissolution. Streptococcus h
molyticus and Streptococcus viridans do not undergo dissolution under similar experimental conditions.
Submitted on December 15, 1921