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Viruses (biological)
A virus is a small infectious agent that can replicate only inside the living cells of organisms. Viruses display a wide diversity of shapes and sizes, called morphologies. Generally viruses are much smaller than bacteria. Most viruses that have been studied have a diameter between 10 and 300 nanometres.
1,710 Questions
How does the bird flu virus replicate by the lytic cycle?
http://pathmicro.med.sc.edu/mhunt/rna-ho.htm
this will clear all your questions
What symptoms are indicative of the flu?
The earliest symptoms of the flu, also known as influenza are sneezing and coughing frequently. If someone in your household is also experiencing high temperatures,higher than that of the cold, and has a runny nose, they probably have the flu.
It is in the lytic cycle.
lytic cycle
Are viruses too small to make copies of themselves?
They are not too small, per se, rather they lack the biological mechanisms to do so (which is arguably related to their size) and so, to put it simply, "inject" their genetic material into other cells, which will then replicate the virus instead of it's self during DNA transcription/translation.
Does the flu shot protect from H1N1?
In a way. Originally we needed to take a separate vaccination for the swine flu. Beginning in the 2010 - 2011 flu season, the regular seasonal flu vaccine was adjusted to include the vaccine for the swine flu. So now you can be protected from swine flu by taking the regular seasonal flu shot in the US.
What is the size shape and unique features for chickenpox virus?
? chicken pox is a disease caused by viruses called the varicella zoster virus (which also causes shingles). viruses are not normally considered organisms because they don't meet all the characteristics of living things.
What are some ways to stop the spread of a human virus?
Wash your hands cover your mouth when you cough and don't get too close to people.
What do you do if you get a fever from the flu shot?
It depends upon how much you received, your age, your size, your general state of health, and any side effects you may be having.
If you have symptoms of allergy or any atypical effects, get immediate medical care. Otherwise, contact your primary health care professional to confirm that you received too much (some dosage amounts may vary depending on the type or brand of the vaccine) and for treatment if needed.
What are 3 main parts of a virus?
Can be made up of three biochemical component's:
1. Genetic Material, which can be made up of either DNA or RNA i.e. long molecules that can carry genetic information.
2. A protein coat that can protect these genes
3. In some cases an envelope of lipids which means that it'll cover the protein coat when they are outside a cell.
Do viruses sense their environment?
Viruses are inert until they encounter proteins on the surface of a cell that they are able to bind to. Once bound, they react by injecting their nucleic acid component into the cell, which takes it over making millions of copies of the virus.
Can you give Tylenol to a person with the flu?
Yes. It is often recommended to help treat the symptoms of the flu and as a fever reducer with the flu. It is better than using aspirin which should not be used for anyone under 18 because of the risk of Reye's Syndrome.
Hello there!
Viruses are usually found in animal reservoirs and some even in humans. Not to forget that some viruses stay suspended in air high up in the atmosphere due to their extremely low weight.
For example, rabies coexists in some bats and other animals without giving them the nasty symptoms, influenza type A lives in many aquatic birds, and the reservoir for smallpox (eradicated) was humans.
Hope this helped you! 😄
How dos the body react to the Ebola virus?
The body reacts to the Ebola virus about four to ten days after the virus has infected your cells. Keep in mind that it doesn't take much for Ebola, or any virus, to infect your cells, so common symptoms may start randomly and abruptly. Early symptoms include: Fever, joint and muscle pain, chills, weakness, server headache, and sore throat.
Over time, keep in mind Ebola kills quickly, symptoms may include: nausea and vomiting, diarrhea (often times bloody), red eyes, raised rash (on dark skin the rash is often not recognized until it peels), chest pain, dry or hacking cough, stomach pain, server weight loss, internal bleeding, and bleeding from ears, eyes, mouth, rectum, and nose. Please note, in the case of a pregnant woman often they have a miscarriage and heavy vaginal bleeding.
Death usually occurs within the second week of the symptoms due to loss of blood.
Why is it not correct to call a virus a microbes?
Viruses are not an organism at all. They are not alive. They are nonliving. They are like cockle burrs that "grab" hold of your clothing or a dog’s coat. They are hijackers. Once they get attached to the cell of a living cell, they can take it over and "make" the living cell produce virus particles instead of cell parts. These particles can assemble into more viruses and then they break out of the cell (killing it) and begin the process again. They cannot make more viruses on their own.
How can you ease the flu symstoms?
There are many ways to ease symptoms of a bad cold. * Take a paracetamol tablet * Take Lemsip * Decongestants e.g. Vicks. * Rest and take it easy, do not over exert yourself. A cold or the flu can make you feel very tired, weak and lethargic. * After using tissues ALWAYS dispose of them and ALWAYS wash your hands EVERY time afterwards. * If it's really bad, stay in bed. * Also take time off sick from work. You don't want your cold/flu germs spread to anybody else do you? * Drink PLENTY of fluids, especially water. * Stay away from people/don't come too close to people till you no longer have symptoms and you are no longer contagious. * Eat lightly/eat only light foods if your appetite is not up to scratch/ don't feel like eating a proper meal. * If symptoms persist/get worse despite these measures above/phlegm is greenish yellow/you see blood in your phlegm/you cough up blood, go and see your doctor. It can mean something more serious such as * Chest/respiratory infection * Bronchitis (inflammation of the bronchi or larger lung tubes) * Pleurisy (inflammation of the lung lining or the pleura) * Pneumonia (inflammation of one or both lungs) * Croup * Epiglottitis (inflammation of the epiglottis, mainly in children) in serious cases can cause the epiglottis to swell and even shut up altogether. This is an EMERGENCY which can require intubation or a tracheotomy. * Lung cancer.
When was a vaccine for rabies invented?
Louis Pasteur and Emile Roux of France developed the first rabies vaccination in 1885. The virus infected tissue was taken from a dead rabbit. The virus was weakened by allowing it to dry in the tissue for a few days.
Is diarrhoea a bacteria or a virus?
Giardia is neither a bacteria or a virus, it is a protozoan parasite.
Attenuated simply means "weakened". Vaccines made with attenuated pathogens, such as the flu virus in flu nasal mist vaccines in the US, work like any vaccine to trigger an immune response so that your body builds up antibodies to be immune to the virus (or whatever pathogen is intended to be prevented). Flu vaccines made for injection, for example, are made with inactive viruses that are either "dead" or are pieces of the virus that are incomplete so they can not cause disease but can trigger the proper immune response and antibody development. Other vaccines, like the flu nasal mist, use whole, "live" viruses in the vaccine preparation to get a better response and, in those vaccinations, the live viruses are weakened so that they can not make you ill but can cause the proper immunity to be developed.
See the related questions below for more detailed information.
What countries is Ebola found in?
No, it has been found in the U.S. However, it has not been found in humans outside of Africa. It found it's way into the U.S. in monkeys imported from Africa, shipped to Reston, Virginia. The strain of Ebola is now known as "Ebola Reston". This strain can only be spread from animal to animal. But, it could be spread through the air, and it was spread through the air vents. The military killed all the monkeys and the epidemic was stopped.
How long does cold virus live for on surfaces?
From the UK National Health Service (NHS):
"The flu virus can live on a hard surface for up to 24 hours, and a soft surface for around 20 minutes."
See the link below in the related links section to this information from NHS.
Other studies have shown that flu viruses and other microbes can "live" on money, both coins and paper money, for much longer under certain conditions. Paper money had viruses viable in one study for over two weeks. See the related question section below for: "Can flu viruses be spread on money?"
In an other study, according to James Steckelberg, M.D., a disease specialist from the Mayo clinic, and other colleagues, it was found that:
The length of time that cold or flu germs can survive outside the body on an environmental surface, such as a doorknob, varies greatly. But the suspected range is from a few seconds to 48 hours - depending on the specific virus and the type of surface.
Click on the Related Link to read the rest of the article from Mayo Clinic.
Flu viruses tend to live longer on surfaces than cold viruses do. Also, it's generally believed that cold and flu viruses remain active ("live") longer on nonporous surfaces - such as plastic, metal or wood - than they do on porous surfaces - such as fabrics, skin or paper.
Although cold and flu viruses primarily spread from direct person-to-person contact, you can also become infected from contact with contaminated surfaces. The best way to avoid becoming infected with a cold or flu is to wash your hands frequently with soap and water or with an alcohol-based hand sanitizer. See more prevention techniques in the related questions.
From the US CDC and Flu.Gov web pages:
"The H1N1 virus is new. Research is being conducted to better understand its characteristics. Studies have shown that flu viruses can survive on hard surfaces and can infect a person for up to 2 to 8 hours after being left on items like cafeteria tables, doorknobs, and desks. Frequent hand washing will help you reduce the chance of getting contamination from these common surfaces."
Is rabies a lytic or lysogenic virus?
Yes rabies is lytic. The lytic cycle is a cycle of viral reproduction and is how some diseases are spread.
Where does a virus replicate itself?
Viruses do not reproduce since they are not alive but they hijack the host's DNA to make more viruses.
What is the name for the outer protein coat of a virus?
Howdy fellow user!
The envelope of a virus is made of a lipid bilayer derived from the host during the budding stage, basically the exiting stage of a newly made virus particle.
Let's do a little rewind.
The virus infects the cell to make many copies of itself by using the transcription and translational machinery available there. The virus proteins are translated first. Some of them are envelope proteins that get collected on the surface of the cell in a designated spot so when the virus buds off, it takes the bilayer with the accumulated envelope proteins.
Hope you found this response useful! 😄
The vast majority of common cold viruses, primarily rhinoviruses and coronaviruses, are single-strand RNA viruses.
