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The long delay in issuing this, the final, section of the Handbuch is doubtless in large part due to the multiplicity of studies appearing in recent years on the group of paratyphoid bacilli. The bibliography attached to this summary contains approximately two thousand titles. As is well known, some of the most acute problems in bacteriology and epidemiology seem to come to a focus in this group, and the fact that they are by no means settled renders the task of appraisal a difficult one. The author's somewhat fumbling treatment of this subject must probably be attributed mainly to the general divergence and uncertainty of opinion. In point of fact, it is manifestly impossible for any one to harmonize the conflicting statements and contradictory evidence of various experimenters. Some workers, indeed a good many, must be mistaken in their methods or interpretation, or in both. As a source book this
Handbuch der pathogenen Mikroorganismen.. JAMA. 1932;98(1):74. doi:10.1001/jama.1932.02730270078038