What is a common indication for using antibiotics?

The use of antibiotics is primarily indicated for the treatment of bacterial infections. Antibiotics are designed to target specific features of bacterial cells, such as cell wall synthesis or protein synthesis, which are not found in viruses or fungi. This ability makes them effective in combating diseases caused by bacteria, such as strep throat, urinary tract infections, and bacterial pneumonia.

Viral infections, on the other hand, do not respond to antibiotics since viruses have different structures and replication mechanisms, requiring antiviral medications instead. Fungal infections are treated with antifungal medications, as the mechanisms of action and target organisms differ significantly from bacteria. Lastly, autoimmune diseases are typically managed through immunosuppressants or anti-inflammatory therapies rather than antibiotics, as these conditions arise from inappropriate immune responses and not infections. Therefore, the correct indication for antibiotic use is specifically in the treatment of bacterial infections.