Biocides inducing resistance in Lascaux cave’s microbes

Study makes researchers wonder whether they should treat fungus or not

Biocides used in recent years to treat the growth of a black fungus on the cave-art-festooned walls of France’s Lascaux cave have eradicated some populations of human-introduced bacteria and fungi. However, those that remain — including some related to known human pathogens — are becoming biocide-resistant, researchers report in an upcoming issue of Naturwissenschaften.