- An antibiotic is…
Bactericidal or bacteriostatic drug capable of killing bacteria or inhibiting bacterial growth, respectively. Antibiotics are used in the fight against bacterial infections. As an increasing number of germs is developing antibiotic resistance, scientists are constantly searching for new candidate antibiotics. The oldest and most well-known antibiotic is penicillin, derived from the fungus Penicillium chrysogenum, which interferes with bacterial cell division.