EEMB 50 Non Infectious Diseases
EEMB 50 Non Infectious Diseases
Popular in Course
verified elite notetaker
Popular in Ecology
This 3 page Reader was uploaded by Gabriela Lopez on Friday April 18, 2014. The Reader belongs to a course at University of California Santa Barbara taught by a professor in Fall. Since its upload, it has received 174 views.
Reviews for EEMB 50 Non Infectious Diseases
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 04/18/14
EEMB 50 NON Infectious Diseases Lecture 8 April 16 2014 Cancer Screening and Viruses Types of Cancer screen 1 Visual 2 Tactile feeling 3 Imaging looking inside the body 4 Fluid Very few of the human body can be seen so we use screening to see inside By the time a doctor machine can detect a cancer the cancer may already be too big and deadly X Rays are used to but they themselves are dangerous because they cause cancers too after too much exposure from the radiation PSA Testing comes with problems and has begun to fall out of favor Normally PSA chemicals can go into bloodstream but with Prostate cancer more PSA can leak into blood because the cells are disorganized Prostate testing was recommended for men over the age of 40 50 The problem with over diagnosis of Prostate cancer is that only a small number of these tumors will turn dangerous and this test detects all EVEN those which are NOT dangerous Deciding to treat all may come with side effects worse than the non dangerous cancer would have caused It is recommended but the benefits do not outweigh the harmful effects Doctors order the test in order to cover themselves from possible future dangerous cancer cases that might arise and so send patients to take test anyway People abide to take these tests because they are not aware of how many benign tumors they have in their bodies and as they get older the chance of finding a tumor is higher Imaging Technology 1 Leading to more diagnosis of cancers but little effect on what matters 2 Too much over diagnosis but not seeing more deaths because they remain the same because even those with nondeadly tumors are being identified as patients Cytological Screening 1 Pap Smear falls under this category 2 Pap Smear named after George Papanicolau who collected samples of cells from the reproductive tracts of guinea pigs and women and in a woman who had cervical cancer noticed abnormal cells 3 He studied these cells and suggested that these cells taken from Women s reproductive tracts could be used to detect cervical cancer 4 It was a useful technique that could detect cervical cancer at an early stage and by the 1950 s was being widely used 5 This cervical cancer screening is very effective and saves the lives of about 35000 Women every year 6 It is successful because this 0 Causes of Cervical Cancer 1 Associated with viruses 2 HPV Human Papillomavirus is picky about which cells it will infect in the human body they have specific ecological niches Within the human body 3 HPV 16 AND 18 are associated with Cervical cancer and affect the mucosal membrane of the human reproductive tract and attacks the basal cells through skin then infects the cells 4 It is a very narrow region which can become infected and can be detected early with a pap smear 0 Pap Smear is a good screen because 1 it requires a limited search area 2 done repeatedly 3 visual search 0 Cervical Cancer is the 2nd highest death for Women 0 It needs to be done regularly to prevent so many deaths 0 Some cancer screening may be harmful pointless or even recommended for everyone 0 The association with HPV can be helped through the use of vaccines 0 HPV is a sexually transmitted disease so there is controversy about giving young girls ages 9 12 the vaccine 0 Gardasil is a vaccine that prevents cervical cancer if taken before becoming sexually active 0 In a trial those who Were given a placebo resulted in 41 infected with HPV and 9 Without signs of cancer 0 Those who received the vaccine resulted with a 00 for both infection and signs of cancer 0 Social controversy arose because many thought that giving young girls this vaccine would encourage them to become sexually active because they would be protected 0 For cells to become cancerous they must 1 Mutate 2 Mutate both gene suppressor genes 3 Avoid natural cell death and metastasize 0 Viruses and Cancer 0 What causes cancer 1 Some chemicals 2 Some Virusesl bacteria 3 Radiation 4 Hereditary 0 Not appropriate to talk about Viruses causing cancer 1 Only 1 of Women infected with HPV will develop cervical cancer 2 90 of Women with CC are infected with HPV 3 So the Virus doesn t CAUSE in all women
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'