Antibiotic resistance Bell ringer: give an example of artificial selection. What is the difference between artificial and natural selection?
Antibiotics are any chemical that inhibits (prevents) the growth of bacteria or other microbes. • In 1928 Alexander Fleming accidentally discovered pennicilin, the first antibiotic. • By the 1940’s antibiotics were mass produced. This saved many soldiers of WWII from death. • Since the first antibiotic was made, many others have been mass produced. What Are Antibiotics?
Amoxicillin • Ampicillin • Doxycycline • Tetracycline • Erythromycin Common Antibiotics
Antibiotics only work against LIVING organisms • Viruses are not considered living. Why? Will antibiotics work on viruses? Antibiotics
Overtime bacteria can develop resistance to antibiotics. This means that these drugs will no longer harm them. • http://www.brainpop.com/health/diseasesinjuriesandconditions/antibioticresistance/ Antibiotic Resistance
Sometimes the news will talk about “superbugs”. They are talking about bacteria that is resistant to LOTS of antibiotics. • MRSA is one kind of “superbug”. It is a staph infection that is resistant to most kind of antibiotics. Superbugs?
Some reasons why antibiotic resistance happens is: • Overuse of antibiotics thereby killing off the “weak” bacteria and allowing the strong to keep breeding • Overuse of antibiotics in livestock • Not taking the full course of antibiotics • Taking antibiotics when they are not needed (for viruses) Causes
This week you will be working on an essay project. Your goal is to write a paper that will inform someone about antibiotic resistance. Essay Project