> Bacteria both evolve resistance quickly, they also lose it just as quick.
Alas, experiments have shown that it is possible for resistant strains to strongly reduce the cost of resistance maintenance. If there are no naive invaders, this can lead to an evolutionary stable situation where the maintenance of resistance is less costly than losing it.
See Lenski's (old) review "Bacterial evolution and the cost of antibiotic resistance"
Alas, experiments have shown that it is possible for resistant strains to strongly reduce the cost of resistance maintenance. If there are no naive invaders, this can lead to an evolutionary stable situation where the maintenance of resistance is less costly than losing it.
See Lenski's (old) review "Bacterial evolution and the cost of antibiotic resistance"