Bacteriological.—The typhoid outbreak has necessitated the examination of a very large number of specimens of fæces and blood. An investigation into the results shows that there must have been in the past history of the patients a large amount of intestinal infection and bacterial invasion from the intestine (as evidenced by positive agglutinations to organisms of the paratyphoid class). In a large number of cases the fæces show organisms of the paratyphoid group, including many true to type and agglutinating in very high dilutions, but of which the most show a difference from virulent types by reason of their not agglutinating known strains of these organisms. One patient died of an intestinal infection with an organism resembling Flexner Y, but which did not agglutinate with Flexner Y serum even after repeated culture. This lends support to the probability of a deleterious effect upon the health of the individual by these undesirable organisms which at least is a highly important factor in hindering any recovery.
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