No sharp line can be drawn between pathogenic and nonpathogenic Schizomycetes, and some of the most marked steps in the progress of our modern knowledge of these pasteurianum, which is anaerobic, and can fix nitrogen only if protected from oxygen by aerobic species. [Please select]
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Moore and Smith have found in the mouths and nasal cavities of healthy animals, including cattle, bacteria belonging to this group; but these organisms proved to be nonpathogenic. [Please select]
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