characteristics of a good screening test

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Screening for disease is an important process in epidemiology. What are some characteristics of a good screening test and what are some ways you could evaluate it?

Jun 26th, 2015

Thank you for the opportunity to help you with your question!

Some of the characteristics of a good screening test is to noninvasively analyze the bodily fluid such as blood, saliva, and urine. Here is a closer look at how you can use these bodily fluid to screen for diseases.

Blood

Blood is very important in screening for diseases. Blood is very easy to get and is less invasive than taking a biopsy by surgery.  Scientist and medical technologist rely on blood to screen for diseases like HIV, cancer, graft rejection, diabetes , and among others. Total RNA or DNA can be isolated from blood and gene expression from these total RNA can be run to look for biomarkers that can detected what kinds of diseases you will  likely have. For example , in transplantation, blood is often used to screen for genes that may be expressed during a graft rejection.  Glucose and insulin level in the blood can be measured to detect the onset of diabetes.  HIV test used blood to detect the level of immune cells like T-cells that could be low in HIV patients. The onset of cancer can be detected using blood by studying biomarker cancer genes that turn on when cancer strikes. 

Urine

Urine is also very useful for screening for diseases.  Urine can also be used to detect glucose and creatinine level for diseases such as diabetes and graft rejection. 

These bodily fluid are a great ways to screen and detect diseases for patients. They are easy to collect from patients without the need for invasive procedure like surgery. These blood and urine tests are practiced right now in hospitals and clinics across the nation. 

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 26th, 2015

Thank you for this answer, it gives me a better understanding of the screening process and how it ties into epidemic and public health activities. 

Jun 26th, 2015

Hi,

Could you give me a good rating for this answer like a 5. I will answer more of your questions if you have them. Thanks

Jun 27th, 2015

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