AntibioticsAntibiotics are drugs that kill or prevent the growth of bacteria. These substances are produced naturally in many microorganisms and are used to fight off bacterial infections in humans. Keep in mind, however, that not all bacteria are harmful. Many species are beneficial and, if antibiotics are used to destroy pathogens, beneficial bacteria may also be killed.
The discovery and use of antibiotics has saved millions of lives, and the benefits of these drugs cannot be overstated. However, due to overperscription and misuse, many bacterial strains have become resistant to antibiotics. One example is the emergence of resistant strains for the bacteria that cause tuberculosis. Once all but purged form the human population, tuberculosis has mad a comeback and is stronger and deadlier than ever. It has become increasingly difficult to develop new antibiotics faster than bacteria can adapt to them.