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Gut microbial diversity was significantly altered by all four kinds of antibiotics, which lasted for months. In participants that took ciprofloxacin, microbial diversity was altered for up to 12 months. The antibiotic treatments also caused a spike in genes associated with antibiotic resistance. Lastly, the researchers noted that clindamycin killed off microbes that produce butyrate, a short-chain fatty acid that inhibit inflammation, carcinogenesis, and oxidative stress in the gut. - arstechnica.com
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