Final answer:
Agents to treat fungal infections are classified into four major groups: superficial mycoses, subcutaneous mycoses, systemic mycoses, and cutaneous mycoses.
Step-by-step explanation:
Fungal infections are challenging to treat because fungi are eukaryotes and do not respond to traditional antibiotics like bacteria. Agents to treat fungal infections are classified into four major groups: superficial mycoses, subcutaneous mycoses, systemic mycoses, and cutaneous mycoses. These classifications are based on the invasiveness of the fungal infection into different layers of the body.