dr walker 28.02.2017
... birds will be tested from confirmed lofts that were infected 1, 2 and 3 months ago. Carriers will be shedding the virus and be positive on testing. Once the carrier state ends, the virus will not be shed and the tests will become negative. As the first cases in Victoria were only 3 months ago we don ...
... birds will be tested from confirmed lofts that were infected 1, 2 and 3 months ago. Carriers will be shedding the virus and be positive on testing. Once the carrier state ends, the virus will not be shed and the tests will become negative. As the first cases in Victoria were only 3 months ago we don ...
What is a virus - Virology World
... evolve at an enormous rate. When a virus infects a single cell it can often produce many thousands of copies of itself in 24 hours. So an antiviral drug which might stop 99.9% of a particular virus from growing would still allow many viruses (from a single cell) to escape its effects. So after a few ...
... evolve at an enormous rate. When a virus infects a single cell it can often produce many thousands of copies of itself in 24 hours. So an antiviral drug which might stop 99.9% of a particular virus from growing would still allow many viruses (from a single cell) to escape its effects. So after a few ...
EBOLA VIRUS DISEASE: TEMPERATURE CHECKS FOR
... disease is 2 to 21 days (average 14 days). A patient may travel for weeks without fever or any other symptom during the long incubation period (up to 6 weeks in some reported cases) (2). Second, detecting a traveler with fever will produce unnecessary alarm in the whole airport and among travelers s ...
... disease is 2 to 21 days (average 14 days). A patient may travel for weeks without fever or any other symptom during the long incubation period (up to 6 weeks in some reported cases) (2). Second, detecting a traveler with fever will produce unnecessary alarm in the whole airport and among travelers s ...
PPT - National Journal
... Source: Lena H. Sun and Brady Dennis, “Why the United States is So Vulnerable to the Alarming Spread of the Zika Virus,” The Washington Post, January 27, 2016. ...
... Source: Lena H. Sun and Brady Dennis, “Why the United States is So Vulnerable to the Alarming Spread of the Zika Virus,” The Washington Post, January 27, 2016. ...
Viral Pathogens
... • typically produce 1000s to 100,000s per infected cell • often destroy (lyse) the host cell as a result of infection – some viruses: host cell survives to shed viruses over time ...
... • typically produce 1000s to 100,000s per infected cell • often destroy (lyse) the host cell as a result of infection – some viruses: host cell survives to shed viruses over time ...
Viruses, Viroids, and Prions
... Some viruses have the ability to become dormant inside the cell Called latent viruses They may remain inactive for long periods of time (years) Later, they activate to produce new viruses in response to some ...
... Some viruses have the ability to become dormant inside the cell Called latent viruses They may remain inactive for long periods of time (years) Later, they activate to produce new viruses in response to some ...
Notes: Spread, Treatment, and Prevention of Disease
... widespread area (usually worldwide) rather than being confined to a particular location or region and affect global populations. An epidemic is not worldwide. For example, malaria can reach epidemic levels in regions of Africa but is not a threat globally. However, a flu strain can begin locally (ep ...
... widespread area (usually worldwide) rather than being confined to a particular location or region and affect global populations. An epidemic is not worldwide. For example, malaria can reach epidemic levels in regions of Africa but is not a threat globally. However, a flu strain can begin locally (ep ...
The World of Microbes
... more familiar eukaryotes, mitosis does not occur in prokaryotes. Instead, most replicate by a process of binary fission. ...
... more familiar eukaryotes, mitosis does not occur in prokaryotes. Instead, most replicate by a process of binary fission. ...
Notes - Mrs. Kievit Science
... Viruses • Viruses are ______________________________ and can infect all types of organisms. • They are obligate intracellular parasites, meaning they cannot replicate outside of cells. • A single virus particle (__________________) is composed of genetic material either DNA or RNA, enclosed in a pro ...
... Viruses • Viruses are ______________________________ and can infect all types of organisms. • They are obligate intracellular parasites, meaning they cannot replicate outside of cells. • A single virus particle (__________________) is composed of genetic material either DNA or RNA, enclosed in a pro ...
VIRUSES
... In order for adsorption to occur the viral spikes must be ______ to the receptor sites on the host cell. Viruses must obtain this from the host cell. The movement of neoplastic cells from one part of the body to another resulting in the formation of a secondary tumor. The viral core may consist of D ...
... In order for adsorption to occur the viral spikes must be ______ to the receptor sites on the host cell. Viruses must obtain this from the host cell. The movement of neoplastic cells from one part of the body to another resulting in the formation of a secondary tumor. The viral core may consist of D ...
Bacteria and Viruses Notes
... – Viral genetic material recombines with host cell’s DNA Examples: HIV, Herpes, and Chicken pox ...
... – Viral genetic material recombines with host cell’s DNA Examples: HIV, Herpes, and Chicken pox ...
What’s up with the flu? - Winona Senior High School
... Low virulence - they rarely cause serious illness and are rarely lethal, but ... High human-to-human transmissibility - they spread easily from person to person. ...
... Low virulence - they rarely cause serious illness and are rarely lethal, but ... High human-to-human transmissibility - they spread easily from person to person. ...
Health Alerts
... • Sierra Leone – 12 suspected cases, all tested negative Patient isolation, contact tracing in effect; PPE in healthcare and burial practices No travel restrictions Virginia hospitals and local health departments on alert for incoming ill travelers ...
... • Sierra Leone – 12 suspected cases, all tested negative Patient isolation, contact tracing in effect; PPE in healthcare and burial practices No travel restrictions Virginia hospitals and local health departments on alert for incoming ill travelers ...
Viruses (Chapter 13)
... Contains a single type of nucleic acid: RNA or DNA Contains a protein coat that surrounds the nucleic acid Capsid: most of mass of cell; composed of protein subunits (capsomers) Coat may be enclosed in envelope (lipids, proteins, carbohydrates) When extruded, part pf host’s plasma membrane becomes e ...
... Contains a single type of nucleic acid: RNA or DNA Contains a protein coat that surrounds the nucleic acid Capsid: most of mass of cell; composed of protein subunits (capsomers) Coat may be enclosed in envelope (lipids, proteins, carbohydrates) When extruded, part pf host’s plasma membrane becomes e ...
Zoonoses - USAID Natural Resource Management and
... Avian Influenza • Pandemic potential: – Rapid viral mutation rates – Recombination event between HPAI and seasonal flu ...
... Avian Influenza • Pandemic potential: – Rapid viral mutation rates – Recombination event between HPAI and seasonal flu ...
Emerging Infectious Disease, Zoonoses and the Human
... Avian Influenza • Pandemic potential: – Rapid viral mutation rates – Recombination event between HPAI and seasonal flu ...
... Avian Influenza • Pandemic potential: – Rapid viral mutation rates – Recombination event between HPAI and seasonal flu ...
Pulmonary Lecture Preview
... Management includes management of hydration and oxygenation. Bronchodilator therapy and glucocorticoids are indicated if wheezing (studies currently published refute this but most clinicians are skeptical.) Nasal suctioning is also helpful ...
... Management includes management of hydration and oxygenation. Bronchodilator therapy and glucocorticoids are indicated if wheezing (studies currently published refute this but most clinicians are skeptical.) Nasal suctioning is also helpful ...
Lecture 22: patterns of infection
... • The immune system detects “epitopes” on “antigens”: structural features of molecules • Antigenic variation: – Changes in the epitopes of viral proteins that are presented to the immune system. ...
... • The immune system detects “epitopes” on “antigens”: structural features of molecules • Antigenic variation: – Changes in the epitopes of viral proteins that are presented to the immune system. ...
H1N1 Influenza A infection
... the central Mexican state of Veracruz may be the likely source of the virus. The virus seems to have evolved to a stronger form because of the abuse of antibiotics, which have been used to keep the pigs alive in the extreme conditions needed to maximize profit. However, many researchers believe that ...
... the central Mexican state of Veracruz may be the likely source of the virus. The virus seems to have evolved to a stronger form because of the abuse of antibiotics, which have been used to keep the pigs alive in the extreme conditions needed to maximize profit. However, many researchers believe that ...
Assembly, Maturation, and Release - Cal State LA
... virions contain a copy of each segment? The answer is simple for some – they don’t. For others, there appear to be specific mechanisms for packaging their segmented genomes. Each segment may have its own unique pac site. For influenza virus the ratio of virus particles to actual infectious uni ...
... virions contain a copy of each segment? The answer is simple for some – they don’t. For others, there appear to be specific mechanisms for packaging their segmented genomes. Each segment may have its own unique pac site. For influenza virus the ratio of virus particles to actual infectious uni ...
Detection and differentiation of Newcastle disease virus and
... strains cause respiratory disease in young chickens and decreased egg production, whereas lentogenic (avirulent) strains cause mild respiratory infection or give no symptoms in poultry (Seal et al., 1995). Avian Influenza virus (AIV) is a member of the Orthomyxoviridae family. Similarly to NDV, AIV ...
... strains cause respiratory disease in young chickens and decreased egg production, whereas lentogenic (avirulent) strains cause mild respiratory infection or give no symptoms in poultry (Seal et al., 1995). Avian Influenza virus (AIV) is a member of the Orthomyxoviridae family. Similarly to NDV, AIV ...
AntibioticsAntiviral..
... Effects range from delayed progression of AIDS and other viruses to decrease in flu-like symptoms, decrease in frequency of herpes-like flare-ups, or crusting over ...
... Effects range from delayed progression of AIDS and other viruses to decrease in flu-like symptoms, decrease in frequency of herpes-like flare-ups, or crusting over ...
End of Chapter Questions
... 5. Explain the meaning of the term reverse transcriptase. Reverse transcriptase is when an enzyme that catalyzes the production of DNA from RNA, the opposite of transcription, hence the term reverse transcriptase. 6. A virus is a biologically active particle composed of protein and nucleic acid. 7. ...
... 5. Explain the meaning of the term reverse transcriptase. Reverse transcriptase is when an enzyme that catalyzes the production of DNA from RNA, the opposite of transcription, hence the term reverse transcriptase. 6. A virus is a biologically active particle composed of protein and nucleic acid. 7. ...
Viral hemorrhagic fever
... -N, V, abdominal pain -Fever, Weakness -Organ failure + bleeding Death in 60-90% of patients Highly infectious Modes of transmission: -Person to person contact with blood or body primates No specific treatment, supportive care only Major outbreak in west Africa By end of Oct. 2014: 10,000 cases; hal ...
... -N, V, abdominal pain -Fever, Weakness -Organ failure + bleeding Death in 60-90% of patients Highly infectious Modes of transmission: -Person to person contact with blood or body primates No specific treatment, supportive care only Major outbreak in west Africa By end of Oct. 2014: 10,000 cases; hal ...
37991
... As a result, their genetic composition constantly changes in small ways. Updated influenza vaccine needed each year ...
... As a result, their genetic composition constantly changes in small ways. Updated influenza vaccine needed each year ...
Influenza A virus
Influenza A virus causes influenza in birds and some mammals, and is the only species of influenza virus A. Influenza virus A is a genus of the Orthomyxoviridae family of viruses. Strains of all subtypes of influenza A virus have been isolated from wild birds, although disease is uncommon. Some isolates of influenza A virus cause severe disease both in domestic poultry and, rarely, in humans. Occasionally, viruses are transmitted from wild aquatic birds to domestic poultry, and this may cause an outbreak or give rise to human influenza pandemics.Influenza A viruses are negative-sense, single-stranded, segmented RNA viruses.The several subtypes are labeled according to an H number (for the type of hemagglutinin) and an N number (for the type of neuraminidase). There are 18 different known H antigens (H1 to H18) and 11 different known N antigens (N1 to N11). H17 was isolated from fruit bats in 2012. H18N11 was discovered in a Peruvian bat in 2013.Each virus subtype has mutated into a variety of strains with differing pathogenic profiles; some are pathogenic to one species but not others, some are pathogenic to multiple species.A filtered and purified influenza A vaccine for humans has been developed, and many countries have stockpiled it to allow a quick administration to the population in the event of an avian influenza pandemic. Avian influenza is sometimes called avian flu, and colloquially, bird flu. In 2011, researchers reported the discovery of an antibody effective against all types of the influenza A virus.