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Chapter Seventeen
Chapter Seventeen

... Breakdown of public health measures ...
PowerPoint 演示文稿
PowerPoint 演示文稿

... Mechanims of Action of IFN and IFN • Infected cell produces membrane receptors for IFN and  • Activates an RNAase that cleaves viral RNA • Inactivates viral protein synthesis by effects on dsRNA-dependent protein kinase • Induces Anti-viral response and resistance to intra-cellular viral replica ...
Circular of Information CBS to Begin using HCV RNA and HIV
Circular of Information CBS to Begin using HCV RNA and HIV

... I. Infectious diseases may be transmitted in spite of careful selection of donors and testing of blood. Donor selection criteria are designed to screen out individuals who are at an increased risk for HIV , HTL V, and hepatitis infection. Each donor sample is tested for: .antibodies to HIV (HIV-I/HI ...
Diseases Worksheet - Hickman Science Department
Diseases Worksheet - Hickman Science Department

... 3. Name three things that can cause an infectious disease. 4. What is the difference between a virus and a bacterium? 5. By itself, is a virus a living organism? 6. Approximately how many people get influenza (flu) each year? 7. If you had a “head cold” would it be the flu or the common cold? Why? 8 ...
Don`t Get Stuck With Something You Can`t Live With
Don`t Get Stuck With Something You Can`t Live With

... workers have brought suit against the manufacturer of the device they were using at the time of their injury ...
About-hiv-viruses
About-hiv-viruses

... About hiv viruses Viruses are a common throughout the whole world, residing in almost any environment and living in every organism. One way common for virus to transmit itself is from human to human exposure. A human carrying the virus can use different modes of transmission to give the virus to ano ...
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... •Half will die between 3 and 10 years of age – “slow progressors” •A child that presents early (< 1 year of age) is more likely to die quickly ...
THE GENETICS OF VIRUSES
THE GENETICS OF VIRUSES

... the viral envelope. ER also makes glycoproteins 4- Vesicles transport glycoproteins to cell’s plasma membrane 5- Capsid assembles around each viral genome molecule 6- Virus buds from cell using cell plasma membrane as envelope  Some use envelopes from the nuclear membrane b/c they reproduce within ...
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... BVD Bovine Viral Diarrhea Virus is an RNA virus belonging to the genus Pestivirus. It is endemic in the Irish cattle population. BVDV can infect susceptible cattle of all ages, but has most costly effects when it infects pregnant females. Fetal infection between 90-120 days gestation may result in w ...
West Nile Virus Quiz #1
West Nile Virus Quiz #1

... 1. Mosquitoes that become infected with the West Nile Virus can transmit the virus to another bird, person, or other animal after __________________ days. a. b. c. d. ...
PowerPoint 演示文稿
PowerPoint 演示文稿

... Mechanims of Action of IFN and IFN • Infected cell produces membrane receptors for IFN and  • Activates an RNAase that cleaves viral RNA • Inactivates viral protein synthesis by effects on dsRNA-dependent protein kinase • Induces Anti-viral response and resistance to intra-cellular viral replica ...
Disease and Contemporary Society
Disease and Contemporary Society

... As the lecture series deals with current topics there are no books dealing directly with much of the course material. These books are easy to read and provide background. ...
Immunity
Immunity

... and burst out of the host cell, killing the cell and going on to infect other cells. ...
Anti-Infectious Pancreatic Necrosis Virus (IPNV) VP2 protein. IgG
Anti-Infectious Pancreatic Necrosis Virus (IPNV) VP2 protein. IgG

... This antibody is able to neutralize IPN virus and can be used in ELISA (1:5,000 dilution), Western blot (1:1,000 dilution), and indirect immunofluorescence (1:500). It recognizes a 54 kDa protein corresponding to VP2 protein. IPNV is a single-shelled, non-enveloped virus that belongs to the family B ...
Infectious Diseases of the Nervous System and Their Impact
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... characteristic of neurotropic strains. Some envelope glycoprotein variants (named N283) are more frequently isolated from infected brains than from other organs [16]. These variants were likely selected by their ability to bind to low levels of the HIV receptor CD4 and coreceptor CCR5 on perivascula ...
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EthiopiaARTguidelinesupdate20131392833851

... avert a significant number of new HIV Infections. Earlier treatment would boost the immune system, making it less likely that the patient falls sick with TB and other opportunistic diseases which prey on weakened immune systems. This would benefit both the individual concerned and help protect the w ...
Outbreak! Viruses in Our Water Assessment
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... C. Can be vaccinated against D. Can be pathogenic ______ 2. Which is a common virus found in water? A. Salmonella B. E. coli C. Cryptosporidium D. Gastroenteritis ______ 3. Which is NOT step in viral reproduction? A. Coating B. Assembly C. Penetration D. Attachment ______ 4. How are bacteria differe ...
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... healthy people. The 1918 outbreak was the most deadly killing 20-40 million people worldwide with nearly half of these deaths in young adults in the 20-40 year age group. It is generally agreed that the world is moving closer to another pandemic. The country most affected by the current avian H5N1 i ...
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... machinery necessary for normal virus replication to prevent virus production, are called "defective interfering particles" (DIP). ...
Biology 261 Name __On_Scantron_Sheet
Biology 261 Name __On_Scantron_Sheet

... who are also infected with hepatitis B. is caused by a small RNA virus that only causes infections in individuals who are also infected with hepatitis A. is usually transmitted through contaminated food or water. is caused by a member of the herpes virus group. is the most common form of viral hepat ...
Sample Exam 3 Key
Sample Exam 3 Key

... the onset of weight loss, persistent fever, and diarrhea. the development of certain types of tumors. a combination of secondary bacterial, protozoan, and fungal infections. swelling of the lymph nodes for greater than six months in two or more regions of the body (excluding the groin). loss of memo ...
病毒概述
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... and make defective viruses replicate progeny virions when they simultaneously同时 infect host cell with defective viruses. ...
Chapter 20
Chapter 20

... change and start to recognize and bind to cell surface receptors on lymphocytes called T cells • Unlike its activity in macrophages, HIV reproduces in T cells and then destroys them • Upon destroying T cells, virus particles increase in number in the blood and infect more lymphocytes • It is this de ...
Chapter 29
Chapter 29

... genital warts (HPV), HIV/AIDS, and other sexually transmitted diseases 16- Describe the clinical coarse of HIV/AIDS 19- Identify the benefits of setting personal goals for maintaining a healthy body 10- Recognize that sexually transmitted diseases, including HIV/AIDS, are communicable diseases and t ...
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HIV



The human immunodeficiency virus (HIV) is a lentivirus (a subgroup of retrovirus) that causes HIV infection and acquired immunodeficiency syndrome (AIDS). AIDS is a condition in humans in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive. Without treatment, average survival time after infection with HIV is estimated to be 9 to 11 years, depending on the HIV subtype. Infection with HIV occurs by the transfer of blood, semen, vaginal fluid, pre-ejaculate, or breast milk. Within these bodily fluids, HIV is present as both free virus particles and virus within infected immune cells.HIV infects vital cells in the human immune system such as helper T cells (specifically CD4+ T cells), macrophages, and dendritic cells. HIV infection leads to low levels of CD4+ T cells through a number of mechanisms, including apoptosis of uninfected bystander cells, direct viral killing of infected cells, and killing of infected CD4+ T cells by CD8 cytotoxic lymphocytes that recognize infected cells. When CD4+ T cell numbers decline below a critical level, cell-mediated immunity is lost, and the body becomes progressively more susceptible to opportunistic infections.
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