For most bacterial infections, a doctor will prescribe oral or topical antibiotics to slow down the bacterial strain’s proliferation and eventually eliminate it. Some examples of common antibiotic medicines include penicillins, tetracyclines, and aminoglycosides. However, some bacterial strains have become antibiotic-resistant, such as methicillin-resistant Staphylococcus aureus (MRSA), streptococcus pneumonia, and Escherichia coli (E. coli). Specialized antibiotic treatment is typically prescribed in cases of antibiotic resistance, but the success rates are lower than with regular bacterial infections.