What term describes a secondary infection caused by a different microbial agent resistant to the first treatment?

The term that describes a secondary infection caused by a different microbial agent that is resistant to the first treatment is known as a superinfection. This term is often used in the context of antibiotic therapy, where the initial treatment for one infection can disrupt the normal flora of the body, leading to an overgrowth of resistant microorganisms. As a result, a new infection occurs that is difficult to treat because the causative agents are resistant to the antibiotics previously used.

Understanding superinfections is crucial in pharmacology and clinical practice, as it emphasizes the importance of using antibiotics judiciously to prevent the development of resistance and additional infections. In contrast, the other terms presented—intense infection, double infection, and secondary infection—do not specifically capture the concept of the new infection arising from resistance to prior treatment.