Acquired microbial antibiotic resistance to vancomycin is a growing problem, particularly within health care facilities such as hospitals.

Tumor cell variants which have acquired resistance to elimination then enter the escape phase.

Serial passage is also used in antimicrobial testing to determine how quickly an organism can acquire resistance to an antibiotic.

Tuberculosis is known to acquire resistance to drugs that are given to patients inefficiently.

Selection of cattle for good ability to acquire immune resistance to ticks is potentially effective.

Traditional insecticides are of limited use, as some strains have acquired resistance to several insecticides.

Virulence weakens in a healthy population and as hosts acquire resistance.

Results showed efficacy against TB, albeit with minor toxicity and acquired bacterial resistance to the drug.

However, acquired resistance to F. hepatica infection is well known in adult cattle.

Moreover some breast cancers acquire resistance to tamoxifen during the course of treatment and few are totally resistant to it.