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XXIX] more, Shiga claims by immunizing animals to have produced a serum which has reduced the mortality in " epidemic " dysentery in Japan from about 35 per cent, to 9 per cent. The cultural characters of B. dysenteriœ are subject to great variation. As a consequence considerable confusion has arisen; but it is now generally conceded that, though indicating different strains of bacilli, these differences are not specific. The Table which will be found on p. 509 indicates the leading characters of the various strains and a comparison with other pathogenic intestinal bacilli.