We present a case of acne successfully treated with a topical spray containing live bacteria. The live bacteria used in the spray contain CRISPR, and adaptive immune system in the bacteria that are used to disable viral replication. Because acne skin contains bacteria in the microbiome where a shift toward non-CRISPR bacteria occurs, these bacteria are susceptible to bacteriophage infection and lysogeny. Normalizing the bacterial microbiome to one containing more CRISPR-containing bacteria renormalizes the microbiome by killing inflammation-causing bacteriophage infecting the non-CRISPR bacteria associated with acne.
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