May 14, 1999

Genetic Switch Found to Control Microbes

By KIM A. McDONALD

Biologists at the University of California at Santa Barbara announced last week that they had identified a "master switch" in many kinds of pathogenic bacteria that can disable the microbes' ability to cause disease.

The remarkable discovery, detailed in the May 7 issue of Science, should permit the development of a new generation of vaccines and antibiotics to control microbial infections, which are

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