Different types of mutations were seen in the bacterial DNA
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/even-small-amounts-antibiotics-can-cause-resistance-bacteria-study
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/antibiotic
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/lakes
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health