From phys.org ... it seems like the advice to take all your antibiotics may not be correct. It's just one study, but I wouldn't be surprised if this becomes accepted sooner rather than later. The authors state that the current advice "was not evidence-based and is incorrect."
https://medicalxpress.com/news/2017-...s-experts.html
But the new paper, which analysed established links between treatment duration and effectiveness, and drug resistance, said there was no evidence for the idea that shorter treatment is inferior, or will trigger antibiotic resistance.
"When a patient takes antibiotics for any reason, antibiotic sensitive species and strains among (microorganisms) on their skin or gut or in the environment are replaced by resistant species and strains ready to cause infection in the future," the team explained.
The longer the antibiotic exposure, the bigger the foothold resistant species will gain. These resistant strains can be transmitted directly between people who have no symptoms of illness.