[quote=Virginia Smith] Antibiotic Resistant Bacteria (DT #8): Due 25 July 2011 by 11:45 P.M. Discuss one of the following topics: 2. Why are antibiotic resistant bacteria a concern to humans? ”. What are some of the most virulent strains of emerging antibiotic resistant bacteria and why are humans at risk from these bacteria? [/quote] Antibiotics kill or inhibit the growth of susceptible bacteria. Sometimes one of the bacteria survives because it has the ability to neutralize or evade the effect of the antibiotic; that one bacterium can then multiply and replace all the bacteria that were killed off. Exposure to antibiotics therefore provides selective pressure, which makes the surviving bacteria more likely to be resistant. In addition, bacteria that were at one time susceptible to an antibiotic can acquire resistance through mutation of their genetic material or by acquiring pieces of DNA that code for the resistance properties from other bacteria. The DNA that codes for resistance can be grouped
This is the end of the preview. Sign up
access the rest of the document.