Though they have always known that antibiotics kill “good” bacteria as well as “bad,” doctors generally assumed the body's microbial community was resilient enough to bounce back. But new studies show that the microbiome struggles to recover from repeated assaults, and may lose species permanently. Blaser suspects that diversity loss is cumulative, worsening from one generation to the next. He calls it “the disappearing microbiota hypothesis.” [boldface by author]How clean should we be, without cleaning out the good microbes—or disturbing the balance between good, bad and neutral ones—that live behind our ears, in our armpits and in our gut and mouth?
Keywords: microbial diversity, microbiome, microbiology, medicine, hygiene, human health.
References and more to explore
 Martin J. Blaser, M. D. [http://www.med.nyu.edu/biosketch/blasem01/research].
 Richard Conniff: The Body Eclectic. Smithsonian May 30, 2013, 44 (2), pp. 40-47 [www.smithsonianmag.com/science-nature/Microbes-The-Trillions-of-Creatures-Governing-Your-Health-204134001.html].