Chapter 17 - Explain why specimens should be taken aseptically

Please Pick 2 question to answer and provide reference. 

Chapter 17

1.Explain why specimens should be taken aseptically, even when nonsterile sites are being sampled and selective media are to be used, and explain why speed is important in the clinical testing process. 

2.In the middle of an outbreak of measles (an infection that is highly communicable), a public health department is using immunologic testing to determine whether sick children have measles or not. If the children test positive, they are quarantined at home, and their contacts are counseled to update their MMR vaccine. In this situation, would you prefer to use a diagnostic test that is highly specific or one that is highly sensitive? Justify your answer. 

3.Explain which type of ELISA can be used to determine an individual’s past exposure to a pathogen.

4.You are working at a health clinic, and a woman enters, suspecting that she was exposed to HIV two nights ago. a.Discuss whether or not she can be tested for HIV infection at this point. b.Summarize how you would respond to this patient, providing her with appropriate information regarding testing for HIV infection. 

5.Compare and contrast the process of restriction analysis used in traditional DNA fingerprinting with the procedure used in pulse-field gel electrophoresis.