Antibiotic-resistant infections occur when bacteria evolve and become resistant to the effects of antibiotics, making standard treatments ineffective. This resistance can develop through various factors, including overuse or misuse of antibiotics in humans and animals, as well as poor infection control practices. When infections become resistant, they can lead to longer hospital stays, higher medical costs, and increased mortality. Common bacteria that cause these infections include Staphylococcus aureus and Escherichia coli. Addressing antibiotic resistance requires careful prescribing practices, improved hygiene, and ongoing research to develop new treatments.