Word: spore
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Dates: during 1940-1940
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Then Dubos found in soil samples a spore-bearing bacillus which actually kills five kinds of pneumococcus; staphylococcus (the pus germ), streptococcus, the diphtheria bacillus. The killing agent is a non-protein substance which Dr. Dubos has isolated in crystalline form. One hundred-thousandth of a gram* of the stuff is enough to destroy a billion pneumococci in two hours...