Could an antibiotic kill the bad bacteria, but spare the good?

Trillions of microbes live in the digestive tract alone, a menagerie estimated to contain more than 1,000 species that are mostly benign, or even beneficial, to us humans. — TNS

Inside every human is a thriving zoo of bacteria, fungi, viruses and other microscopic organisms collectively known as the microbiome.

Trillions of microbes live in the digestive tract alone – a menagerie estimated to contain more than 1,000 species.