“…The distribution of negative cultures obtained after treatment in the groups mentioned above was compiled by Strindberg (1965) from the results of several authors, (Grossman & Stewart, 1949;Ostrander & Crowley, 1948;Soul, 1953;Auerbach, 1953;Rottke, 1954;Stewart, 1955;Sondergward, 1956;Breed & Smith, 1957;Cran, 1957;Ingle & Zeldow, 1958a;195833;Lichtenberg Crone, 1960 & Ingle, 1963;Grossman, 1965;Strindberg, 1965;). The table has been somewhat modified by the present author ( Table I).…”