Slava Epstein, co-founder of NovBiotic, professor of biology at Northeastern University and co-inventor of an isolation chip to grow previously unculturable microorganisms, talks about the promising new antibiotic Teixobactin at NovoBiotic's labs in Cambridge, Massachusetts, U.S., November 22, 2016. To match Special Report USA-UNCOUNTED/DRUGS REUTERS/Brian Snyder