Which class of drugs is known for killing bacteria and is derived from living organisms?

The class of drugs known for killing bacteria and derived from living organisms is antibiotics. Antibiotics, traditionally, are substances that either kill bacteria or inhibit their growth and are primarily sourced from molds and bacteria themselves. Famous examples include penicillin, which is derived from the Penicillium mold, and streptomycin, which comes from the bacterium Streptomyces griseus.

In contrast, antivirals are agents that specifically target viruses, not bacteria. Antifungals are designed to eliminate or inhibit the growth of fungi. Analgesics are pain-relievers and do not have antibacterial properties. Understanding the distinction between these classes of drugs is crucial, especially in clinical settings, to ensure the appropriate treatment for infections.