Virusesand Prions - Pandem-Sim
... separate from the cell’s genetic material. Adenovirus is an example of a DNA virus that replicates in this way; influenza is an example of an RNA virus that also uses the cell’s structures to make RNA copies of itself but stays separate from the host cell’s genome. Retroviruses replicate in a slight ...
... separate from the cell’s genetic material. Adenovirus is an example of a DNA virus that replicates in this way; influenza is an example of an RNA virus that also uses the cell’s structures to make RNA copies of itself but stays separate from the host cell’s genome. Retroviruses replicate in a slight ...
Section 19-3 - Effingham County Schools
... immediately enter the lytic cycle. The viral DNA becomes part of the cell’s DNA without immediately destroying the cell or making new viruses. A latent virus can exist inside host cells for many years. Can become active at any time. Ex- Cold sores. ...
... immediately enter the lytic cycle. The viral DNA becomes part of the cell’s DNA without immediately destroying the cell or making new viruses. A latent virus can exist inside host cells for many years. Can become active at any time. Ex- Cold sores. ...
Viruses Lecture 16 Fall 2008
... Emerging Viruses • Ability of virus to mutate – RNA viruses have very high mutation rate – copy errors are not corrected by proofreading • Dissemination from small isolated human populations • Virus spreads from other animals to human population – “Spanish flu” pandemic of 1918 • 40 million people ...
... Emerging Viruses • Ability of virus to mutate – RNA viruses have very high mutation rate – copy errors are not corrected by proofreading • Dissemination from small isolated human populations • Virus spreads from other animals to human population – “Spanish flu” pandemic of 1918 • 40 million people ...
Chapter 8
... 3. Fever & malaise; yellow mucous membranes. (leads to immunosuppression, anemia, enteritis) 4. No human concern. FELINE IMMUNODEFICIENCY VIRUS 1. Highly infectious virus. 2. Spread in saliva, primarily bite wounds. 3. Chronic secondary respiratory infections, GI, urinary, and skin infections. 4. No ...
... 3. Fever & malaise; yellow mucous membranes. (leads to immunosuppression, anemia, enteritis) 4. No human concern. FELINE IMMUNODEFICIENCY VIRUS 1. Highly infectious virus. 2. Spread in saliva, primarily bite wounds. 3. Chronic secondary respiratory infections, GI, urinary, and skin infections. 4. No ...
PowerPoint Presentation - Infectious Diseases of CNS
... infection and pathogenesis of poliomyelitis. Poliovirus, an “Enterovirus” has an icosahedral capsid shell that protects it from digestion. GI Tract Blood Cord CNS Paralysis of motor neurons ...
... infection and pathogenesis of poliomyelitis. Poliovirus, an “Enterovirus” has an icosahedral capsid shell that protects it from digestion. GI Tract Blood Cord CNS Paralysis of motor neurons ...
Viruses - TeacherWeb
... but the same virus can cause different reactions in different hosts. For example, flu viruses infect birds, pigs, and humans. While some types of flu viruses don’t harm birds, they can overwhelm and kill humans. Plant viruses do not infect animals or vice versa. Viruses that infect bacteria do nothi ...
... but the same virus can cause different reactions in different hosts. For example, flu viruses infect birds, pigs, and humans. While some types of flu viruses don’t harm birds, they can overwhelm and kill humans. Plant viruses do not infect animals or vice versa. Viruses that infect bacteria do nothi ...
Viruses
... • Intracelullar obligate parasites +/• They have no ribosoms or energetic metabolism either • They have no binar division • They have a genom (RNA or DNA) + • They are affected by biological evolution + • They interact with living organisms +/- ...
... • Intracelullar obligate parasites +/• They have no ribosoms or energetic metabolism either • They have no binar division • They have a genom (RNA or DNA) + • They are affected by biological evolution + • They interact with living organisms +/- ...
BioHnrs TEST TOPICS: Intro to Cells (4.1
... 2. Explain how viruses were discovered and the hypotheses regarding their evolution. 3. Explain how viruses can differ and identify what they all have in common. 4. Describe how the human immune system functions to prevent repeat viral infections. 5. Explain what a vaccine is and provide a historica ...
... 2. Explain how viruses were discovered and the hypotheses regarding their evolution. 3. Explain how viruses can differ and identify what they all have in common. 4. Describe how the human immune system functions to prevent repeat viral infections. 5. Explain what a vaccine is and provide a historica ...
Infectious Canine Hepatitis (ICH)
... Dogs are most commonly affected in the first year of life, but unvaccinated dogs of all ages are susceptible. How is it spread? It is transmitted by direct contact with infected urine, saliva and faeces. Furthermore, dogs that have recovered from this disease can still be infectious to other dogs fo ...
... Dogs are most commonly affected in the first year of life, but unvaccinated dogs of all ages are susceptible. How is it spread? It is transmitted by direct contact with infected urine, saliva and faeces. Furthermore, dogs that have recovered from this disease can still be infectious to other dogs fo ...
antiviral alga
... was first reported in 1940 (antibacterial activity of Chorella vulgaris). The antimicrobial properties of seaweed reported in 1951. Antiviral effects of polysaccarides from marine alga reported to inhibit mumps, and influenza B virus. 1969 extracts from red algae inhibited HSV and other viruses. The ...
... was first reported in 1940 (antibacterial activity of Chorella vulgaris). The antimicrobial properties of seaweed reported in 1951. Antiviral effects of polysaccarides from marine alga reported to inhibit mumps, and influenza B virus. 1969 extracts from red algae inhibited HSV and other viruses. The ...
3-respiratory viral infections 2015 updated2015-02
... Lab diagnosis: routine testing by Direct detection of Influenza A or B virus from sputum, nasopharyngeal swab, aspirate (NPA) or respiratory secretion by direct immunoflourecent assay (IFA). Other detection methods: tissue culture, PCR. Treatment: 1: Amantadine is effective against influenza A ...
... Lab diagnosis: routine testing by Direct detection of Influenza A or B virus from sputum, nasopharyngeal swab, aspirate (NPA) or respiratory secretion by direct immunoflourecent assay (IFA). Other detection methods: tissue culture, PCR. Treatment: 1: Amantadine is effective against influenza A ...
Old Exam#3
... B. Input and output particles were similar, therefore there was no infection C. One would expect new viral types (for example H2N8) if the particles had been collected much later, because antigenic drift requires time scales longer than 30 days D. Only H1N2 and H4N2 came out, therefore no mixing of ...
... B. Input and output particles were similar, therefore there was no infection C. One would expect new viral types (for example H2N8) if the particles had been collected much later, because antigenic drift requires time scales longer than 30 days D. Only H1N2 and H4N2 came out, therefore no mixing of ...
Chapter 34
... column after infection with rabies (saliva from rabid dog) virus. Viruses were not known at this time, Pasteur injected health animals with rabid saliva disease. ...
... column after infection with rabies (saliva from rabid dog) virus. Viruses were not known at this time, Pasteur injected health animals with rabid saliva disease. ...
Introduction to Plant Virology • History • Definitions • Classification
... -discovers filtration does not remove infectious agent for TM disease -could not visualize agent with microscope, nor grow on microbial media -concluded he had found infectious agent smaller than bacterium ...
... -discovers filtration does not remove infectious agent for TM disease -could not visualize agent with microscope, nor grow on microbial media -concluded he had found infectious agent smaller than bacterium ...
respiratory viral infections 2015 updated2016-02-07
... Lab diagnosis: routine testing by Direct detection of Influenza A or B virus from sputum, nasopharyngeal swab, aspirate (NPA) or respiratory secretion by direct immunoflourecent assay (IFA). Other detection methods: tissue culture, PCR. Treatment: 1: Amantadine is effective against influenza A ...
... Lab diagnosis: routine testing by Direct detection of Influenza A or B virus from sputum, nasopharyngeal swab, aspirate (NPA) or respiratory secretion by direct immunoflourecent assay (IFA). Other detection methods: tissue culture, PCR. Treatment: 1: Amantadine is effective against influenza A ...
BTY328: Viruses
... Since plant cells are protected by cell walls, plant viruses have a considerable obstacle to overcome when trying to establish themselves in a host. TMV and a few other viruses may be carried by the wind or animals and then enter when leaves are mechanically damaged. The most important agents of tra ...
... Since plant cells are protected by cell walls, plant viruses have a considerable obstacle to overcome when trying to establish themselves in a host. TMV and a few other viruses may be carried by the wind or animals and then enter when leaves are mechanically damaged. The most important agents of tra ...
武汉大学生命科学学院
... Are the following statements true or false? ( +)1. Virus particles cannot generally be seen using light microscopes ( -)2. Edward Jenner first vaccinated a patient against smallpox on 14th May 1976 (+ )3. Louis Pasteur invented the term ‘virus’ in the 1890s ( +)4. Dimitri Iwanowski showed that virus ...
... Are the following statements true or false? ( +)1. Virus particles cannot generally be seen using light microscopes ( -)2. Edward Jenner first vaccinated a patient against smallpox on 14th May 1976 (+ )3. Louis Pasteur invented the term ‘virus’ in the 1890s ( +)4. Dimitri Iwanowski showed that virus ...
Viruses - Chap 13 partI
... Plating efficiency - counts made by plaque assays are always lower than counts made with electron microscope. Plating efficiency with bacteriophage is usually > 50% but with some animal viruses may be <1% The plaque procedure may be used to prepare pure viral strains Cell cultures may also be ...
... Plating efficiency - counts made by plaque assays are always lower than counts made with electron microscope. Plating efficiency with bacteriophage is usually > 50% but with some animal viruses may be <1% The plaque procedure may be used to prepare pure viral strains Cell cultures may also be ...
Health Concerns in the Developing World
... In 2009, it was estimated that 1.8 million people died of the disease It is spread only by humans through contact with infected sexual fluid or blood After a period of incubation, the virus begins to attack White Blood Cells thereby lowering immunity to infections ...
... In 2009, it was estimated that 1.8 million people died of the disease It is spread only by humans through contact with infected sexual fluid or blood After a period of incubation, the virus begins to attack White Blood Cells thereby lowering immunity to infections ...
Viruses - Fillingham
... rapidly and give rise to diverse clones of the virus within one organism, as occurs in humans with AIDS, or result in new genetic strains that may cause disease. This rapid mutation of viruses explains why there is no vaccine against the common cold. ...
... rapidly and give rise to diverse clones of the virus within one organism, as occurs in humans with AIDS, or result in new genetic strains that may cause disease. This rapid mutation of viruses explains why there is no vaccine against the common cold. ...
Borna Disease Virus - Queensland Horse Council
... detection techniques and frequent sub clinical infection inhibit good epidemiological studies, but currently natural infection has been reported only in Central Europe, North America, New Zealand, Japan, Iran, and Israel. Borna disease shows seasonal prevalence, occurring most often in spring and ea ...
... detection techniques and frequent sub clinical infection inhibit good epidemiological studies, but currently natural infection has been reported only in Central Europe, North America, New Zealand, Japan, Iran, and Israel. Borna disease shows seasonal prevalence, occurring most often in spring and ea ...
Microbiology - NYCC SP-01
... 35. Valley Fever is another name for which of the following fungal diseases? a. Histoplasmosis b. Asperilligosis c. Toxidiomycosis d. Blastomycosis 36. A fungal infection of the bearded area of the face might be: a. Tinea babare b. Tinea pedis c. Tinea crura d. Tinea capitis 37. A coat that surround ...
... 35. Valley Fever is another name for which of the following fungal diseases? a. Histoplasmosis b. Asperilligosis c. Toxidiomycosis d. Blastomycosis 36. A fungal infection of the bearded area of the face might be: a. Tinea babare b. Tinea pedis c. Tinea crura d. Tinea capitis 37. A coat that surround ...
C) Viral Life Cycles - Mr. Lesiuk
... - Another way in which viruses affect a cell is through a Lysogenic Cycle. The virus does not reproduce and lyse the host cell (as was the case in the lytic cycle) – at least not right away. - Viruses that do not cause lysis are non-virulent, at this time, instead of being called a virulent phage th ...
... - Another way in which viruses affect a cell is through a Lysogenic Cycle. The virus does not reproduce and lyse the host cell (as was the case in the lytic cycle) – at least not right away. - Viruses that do not cause lysis are non-virulent, at this time, instead of being called a virulent phage th ...
Social history of viruses
The social history of viruses describes the influence of viruses and viral infections on human history. Epidemics caused by viruses began when human behaviour changed during the Neolithic period, around 12,000 years ago, when humans developed more densely populated agricultural communities. This allowed viruses to spread rapidly and subsequently to become endemic. Viruses of plants and livestock also increased, and as humans became dependent on agriculture and farming, diseases such as potyviruses of potatoes and rinderpest of cattle had devastating consequences.Smallpox and measles viruses are among the oldest that infect humans. Having evolved from viruses that infected other animals, they first appeared in humans in Europe and North Africa thousands of years ago. The viruses were later carried to the New World by Europeans during the time of the Spanish Conquests, but the indigenous people had no natural resistance to the viruses and millions of them died during epidemics. Influenza pandemics have been recorded since 1580, and they have occurred with increasing frequency in subsequent centuries. The pandemic of 1918–19, in which 40–50 million died in less than a year, was one of the most devastating in history.Louis Pasteur and Edward Jenner were the first to develop vaccines to protect against viral infections. The nature of viruses remained unknown until the invention of the electron microscope in the 1930s, when the science of virology gained momentum. In the 20th century many diseases both old and new were found to be caused by viruses. There were epidemics of poliomyelitis that were only controlled following the development of a vaccine in the 1950s. HIV is one of the most pathogenic new viruses to have emerged in centuries. Although scientific interest in them arose because of the diseases they cause, most viruses are beneficial. They drive evolution by transferring genes across species, play important roles in ecosystems and are essential to life.