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Gram-positive Clostridium botulinum and bacterial endospores

Photomicrograph of a gentian violet-stained culture specimen revealing the presence of numerous gram-positive Clostridium botulinum, formerly known as Bacillus botulinus bacteria, and bacterial endospores. (Source: Centers for Disease Control and Prevention, 1979. Public Health Image Library ID# 2107, Centers for Disease Control and Prevention, Atlanta, Georgia. Public domain.)

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