Here are two studies from the first page of a Google search on "losing antibiotic resistance", Long-term starvation-induced loss of antibiotic resistance in ba

Here are two studies from the first page of a Google search on "losing antibiotic resistance", Long-term starvation-induced loss of antibiotic resistance in bacteria https://www.ncbi.nlm.nih.gov/pubmed/24196362 https://www.ncbi.nlm.nih.gov/pubmed/24196362 Loss of Antibiotic Resistance in Staphylococcus aureus Resulting from Growth at High Temperature http://www.microbiologyresearch.org/docserver/fulltext/micro/42/3/mic-42-3-403.pdf?expires=1518151991&id=id&accname=guest&checksum=2A3A0392A30F07ACF8F576F19F7755FA http://www.microbiologyresearch.org/docserver/fulltext/micro... And here's a more high level answer from the Biology StackExchange on the mechanism by which this happens with a link to 3 other papers on the underlying subject https://biology.stackexchange.com/a/15930 https://biology.stackexchange.com/a/15930