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Abstract
Treatment of bacterial smears with organic solvents was found to produce a typical appearing nuclei which could lead to false interpretation of nuclear events. The crystal violet nuclear stain, which does not utilize organic solvents or acid hydrolysis, was used as a basis of comparison. Acid hydrolysis also was observed to affect the appearance of the nucleus. It is concluded that caution should be used in interpreting nuclear structure and activity in bacterial cells, especially when organic solvents or acid hydrolysis are involved in the staining technic.