Viruses_and_Prions_SPRING_2011[1]

Viruses_and_Prions_SPRING_2011[1] - March 15, 2011 Viruses...

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March 15, 2011 “Viruses and Prions” The mean for Exam Two was 66.4 Range: 96 – 56 There are still 200 points of hour exams plus extra credit opportunities. Exam Three Study Questions have been posted on Angel 1. Please start completing the answers and studying early !! 2. Don’t skip classes!! 55 people have missed at least 4 of the 8 extra credit opportunities!!!
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Doctors grow new kind of tissue Researchers at Wake Forest University Baptist Medical Center and in Mexico City have successfully grown new sections of urinary tube from patients' own cells and grafted them into five boys. The advance in tissue engineering, announced Monday in the online version of the medical journal The Lancet, involved repairing sections of the urethra. The urethra is the tube that leads from the urinary bladder to outside the body. The new technique has implications for repairing other narrow tubular structures in the body, such as blood vessels, Atala said.
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Viruses When someone mentions viruses, what first comes to mind? What is a “ germ ?” Organism that causes a disease. (What else can it be?) Usually means “bacteria,” but may be some other type of microorganism , e.g., fungus (Athlete’s foot? Yeast?) Technically speaking, is a virus a “germ?” Lay language? Animals and plants all have disease epidemics. -- Why do species become extinct? Because of humans? -- Diseases are a big reason! (Exception – buffalo and carrier pigeons in U.S. Are manatees next?) -- When epidemics break out in several countries, what term do we use? __________ “Hoof and Mouth Disease” was almost a pandemic. -- Is it a new disease? Have you heard of it?
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-- Last known case in the U.S.? ______ disease – greatly affected Europe ~10yr ago -- just after the “Mad Cow” disease outbreaks) -- Does H&M infect humans? -- What animals does H & M affect? Ans: “ungulates” -- Does it usually kill the animals directly? -- Here are some symptoms on swine (pigs, hogs) Blisters on hoof & mouth (cause lameness) Loss of appetite Weight loss Lower (or no) production of milk
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What did Europe do about it? Quarantines Disinfectants
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And, perhaps most gruesome? Burning carcasses! ( Heat deactivates the virus.) Hundreds of thousands of animals!!!
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A vaccine is available but is rarely used. Why don't Europeans use it? “Vaccination is ruled out mainly for commercial reasons. Why? Vaccinated animals , although free of symptoms, can carry the virus and pass it on to other animals. As a result, countries considered free of the disease refuse to import vaccinated livestock.” This disease recently caused major problems in England. Economic losses:
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This note was uploaded on 10/03/2011 for the course ISB 202 taught by Professor Johnson during the Spring '08 term at Michigan State University.

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Viruses_and_Prions_SPRING_2011[1] - March 15, 2011 Viruses...

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