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Cold and Flu

Questions and answers about the "Common Cold"; symptoms in the upper respiratory tract like sneezing, scratchy throat, and runny nose, but adults don't typically have fevers. Colds are usually caused by the rhinovirus (up to 40% of colds), or Coronaviruses (about 20%), but there are more than 200 viruses that can cause the common cold. Also questions about the seasonal flu, also called "regular flu", caused mostly by Type A and Type B Influenza viruses. Flu starts with similar symptoms as a cold only it hits faster and harder and usually includes fever in adults. Although the "stomach flu" is a common term, it is not a real diagnosis. The proper medical term for stomach flu is gastroenteritis (an intestinal disease, sometimes viral but also bacterial), it is often mistaken for influenza because the flu can sometimes include vomiting and diarrhea.

4,331 Questions

What is a host cell for a virus?

A host cell for a virus is a cell that the virus can infect and hijack to replicate itself. The virus enters the host cell, takes over its machinery to produce more virus particles, and then spreads to infect other cells.

Why is it difficult to target a pathogenic virus without damaging the host's cell?

One of the gud example is HIV virus because genetic material of the virus incorporated into the host genetic material and suppress the host metabolic activity it make strength resemble to host .if we can use drugs against virus it doesnt identify different btwn host and virus.so that drugs cause side effects in host .

What kind of infection cause both colds and the flu?

Both colds and flu are caused by viruses, with colds commonly caused by rhinoviruses and flu commonly caused by influenza viruses. Both types of viruses infect the respiratory system, leading to symptoms such as coughing, sneezing, and a runny nose.

Does haemophilus influenza compare to todays Flu?

Not at all, because Haemophilus influenzae (Hib) is the name of a type of bacteria and the flu is caused by viruses;they are entirely different infectious disease-causing organisms. Although the name includes "influenzae" it is not a "flu" virus. When this bacterium was first named in 1892, it was during an influenza pandemic at the time. It was thought then to be the cause of the influenza until 1933 when more was known about viruses and Hib was determined more conclusively to be bacterial and not viral. H. influenzae causes a wide range of different infectious disease processes but it does not cause the flu.

How does a vet treat an animal with the flu?

In general, treatment for influenza consists of medical support - IV fluids if the animal is dehydrated, antibiotics for any secondary bacterial infections, etc. There are no antivirals for animals, unlike for humans.

Why is a virus's reproduction cycle called the lytic cycle?

Lysis means cut open or split, the word lytic comes from lysis. In the lytic cycle, the host cells that have been infected by a virus will fill up with new viruses until they gets too full and then they split open to release the new viral particles, and the cell dies. See more about the lytic cycle in the related questions below.

How does the common cold virus reproduce?

Inside the cells of the host. Viruses can't reproduce without a host's body to do the work and provide the materials for replication. Most cold viruses first attack the mucous tissues, attach to and enter these cells and then force the cell to stop doing its usual job and begin slaving for the virus. The process is called the Lytic cycle, see the related questions below for more information.

What kind of pathogen is crohn's diesase?

Crohn's disease is an auto-immune disorder where the immune system attacks the cells of the small intestines. It is treated by monthly infusions of Remicade, which suppresses the immune system.

How do bacterium and viruses affect the body?

Bacteria and viruses attack the body. Each type of bacteria and virus attack different areas of the body. Also, there are many different ways of gaining access to the body. They attack the body by trying to shut down a certain system, which without your immune system, would kill you. Bacteria and viruses evolve. However, viruses aren't presently categorized as living organisms.

Can zinc treat the common cold?

There is some evidence to suggest that zinc supplements may help to reduce the duration and severity of a cold, but more research is needed to confirm its effectiveness. It is important to follow recommended dosages and speak with a healthcare provider before taking zinc supplements, as excessive intake can lead to side effects.

What is the difference between influenza type A and type B?

Influenza type A and type B are two different strains of the influenza virus. Type A is more common and has the ability to infect animals, while type B primarily infects humans. Type A viruses are categorized into subtypes based on two proteins on the surface of the virus, hemagglutinin (H) and neuraminidase (N), which helps determine their potential to cause pandemics.

Once a virus gets inside a cell does it change the instructions to the cell's nucleus?

No, a virus does not change the instructions in the cell's nucleus. Instead, it uses the cell's machinery to replicate itself. The virus hijacks the cell's normal processes to make new virus particles, which can then infect other cells.

Will it snow tomorrow in Austin Texas?

No it is close to summer plus south Texas barely gets snow

Why does it take an eighty year old longer to recover from the flu than a thirty year old?

As we age, our immune system weakens, making it harder for older adults to fight off infections like the flu. Additionally, older adults may have other underlying health conditions that can further complicate the recovery process. Overall, the immune response in older adults is slower and weaker, leading to a longer recovery time compared to younger individuals.

Does the flu virus live in cold or warm air?

The temperature of the air is not relevant, it is believed to be the absolute humidity level in the air that might affect the virus's ability to infect you more easily in one season than another. Cold and flu viruses thrive when dry. This is why the flu has a season, see the related question for more detail.

More:

Viruses are not really alive or dead like animals and plants, they are active or inactive. They are not cellular and do not function like a living organism.

Does the flu have environmental causes?

Not a direct cause. However, the virus that does cause flu is present in the environment and that is one way it spreads by our contact with the virions (virus particles) on objects and surfaces in the environment from others' coughs and sneezes (along with direct contact with infected individuals).

There is another link between the environment and the incidences of influenza infections, too. That is that the flu likes the environment dry. In the northern hemisphere, our flu season occurs in the fall and winter. The latest info has it that there is a flu season because, at that time of year, the absolute humidity is low, making the type of dry environment that allows more activity by the viruses that cause the flu.

See the related question about why flu has a season on this page.

Why is it easier to shock people in cold weather?

Cold weather causes the air to be less humid, increasing its ability to conduct electricity. This, combined with lower temperatures causing people's skin to have lower resistance, makes it easier to shock people in cold weather.

What tests can be conducted to identify the infectious agent of meningitis?

Tests commonly conducted to identify the infectious agent of meningitis include cerebrospinal fluid analysis for cell count, protein, glucose levels, and culture, as well as polymerase chain reaction (PCR) testing to detect specific genetic material of bacteria, viruses, or fungi. Blood cultures and imaging studies such as CT scans or MRIs may also be used to help identify the source of infection.

Why does being cold lower your resistance to cold virus?

Exposure to cold temperatures can weaken the immune system, making it easier for viruses like the common cold to take hold and cause infection. When the body is cold, the immune response may be compromised, making it harder to fight off viruses. Additionally, cold air dries out the nasal passages, making them more susceptible to viral entry and replication.

Which cells help you get over a cold?

White blood cells, specifically T cells and B cells, play a key role in helping the body fight off a cold by recognizing and attacking the virus. They work together to create antibodies that target the virus and help the immune system remember how to fight off the same virus in the future.

What part of a virus does not enter the host?

Generally, the protein coat that surrounds the viral genetic material and any reverse trascriptase enzymes. This capsid stays outside the cell attacked while the genetic material and whatever else is needed is injected into the cell or the capsid merges with the cell membrane and the vital viral material enters the cell.

When an enveloped virus adsorbs to the host cell with its protein spikes the virions are taken into the cell by the process of?

endocytosis. The envelope of the virus fuses with the host cell membrane, releasing the viral genetic material into the cell. This process allows the virus to hijack the cellular machinery to replicate and spread.

Why do your noses run in cold weather?

because of the extreme coolness,when you face is exposed to the snow your entire face becomes pink this is because of the shortage of blood .i.e when you do not put some thing warm in your face like monky cap,the blood freezes and it will be difficult for blod to circulate to all parts of the body.

i am studying in class six.