Assignment details: After reading materials about evolution and about antibiotic

Question

Assignment details:

After reading materials about evolution and about antibiotic and pesticide resistance in the text, the Course Materials, the AIU Online Library and / or the Internet, answer the following.

1.Select and describe one example of antibiotic resistance or pesticide resistance. Be specific in your choice.
?Describe the background for your choice of resistance. Include details about the disease or pest and the established control strategies. How have we used antibiotics (to treat a particular disease), or pesticides (to protect from a pest); and how has this changed?
2.Explain how the resistant trait evolved based on principles of natural selection and evolution of a trait at the population level.

Explanation / Answer

1. Without giving You the Answer. Use MRSA as an example. Methicillin-resistant Staphylococcus aureus (MRSA) infection is caused by a strain of staph bacteria that's become resistant to the antibiotics commonly used to treat ordinary staph infections. You can use the internet and look it up. 2. Natural selection basically means that if you are preadapted to a situation you will survive. It is frequently part of the skin flora found in the nose and on skin, and in this manner about 20% of the human population are long-term carriers of S. aureus. S. aureus is the most common species of staphylococci to cause Staph infections. One of the reasons for this is a carotenoid pigment staphyloxanthin that is responsible for the characteristic golden colour of S. aureus colonies. This pigment acts as a virulence factor, with an antioxidant action that helps the microbe evade death by reactive oxygen species used by the host immune system If you continously use an antibiotic or are always asking your doc for antibiotics, these meds will eventually not work for you. If just a few of the bacteria are resistant to the antibiotic or better yet hand sanitizer, and survive the treatment and continue to reproduce. the new population of bacteria will be resistant Remember the definition of evolution is the change of a populations gene pool over time. With this bacterial population, it went from being non resistant to resistant because of the change in the gene pool.

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