Drug-resistant pathogens are microorganisms, such as bacteria, viruses, fungi, and parasites, that have developed the ability to resist the effects of antimicrobial drugs that were previously effective in treating infections caused by these pathogens. This resistance can occur naturally or as a result of overuse or misuse of antibiotics, antivirals, antifungals, or antiparasitic drugs. Drug-resistant pathogens pose a significant threat to public health, as they can cause infections that are difficult or impossible to treat, leading to increased morbidity, mortality, and healthcare costs.
