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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.

Asked in Cold and Flu, Viruses (biological), Cell Biology (cytology)

What is the lytic cycle?

The lytic cycle is one of two methods of viral reproduction, the other being the lysogenic cycle. These cycles should not, however, be seen as separate, but rather as somewhat interchangeable. The lytic cycle is typically considered the main method of viral replication (reproduction), since it results in the destruction of the infected cell. The lytic cycle is often described in steps, sometimes three steps, sometimes five steps or six steps. But all describe the same process. See the related question below for...
Asked in Cold and Flu, Seasons, Swine Flu (H1N1/09), Viruses (biological)

Why does the flu have a season?

Why Flu Has A Season Most cases of influenza in the United States fall between the months of November and March, with the peak of infection rates in January and February. But that doesn't mean it is tied only with cold weather. Other places in the world have their flu season in warmer months. It had been long held that this was most probably due to school children returning to schools and people being in closer proximity indoors in winter where they could pass...
Asked in Cold and Flu, Bird Flu, Viruses (biological)

Can you catch a cold by sleeping with a fan on?

No. Colds are caused by your body's susceptibility to a cold virus. While low humidity in a room might create the proper conditions for some viruses, a fan does not have any effect on the humidity level in a room, as a fan simply pushes air around, it does not alter the air like an air conditioner. A fan blowing directly in your face could potentially dry out your mucous tissue and make it slightly easier for a cold virus to gain...
Asked in Biology, Viruses (biological)

Can you get hendra virus from bats from tank water?

All human cases of Hendra virus so far have been caught from horses. The method of transmission to the horses from bats has not been verified. All transmissions to humans have been through nasal fluids from the horses. No information on transmission via tank water has been documented. ...
Asked in Rabies, Viruses (biological)

How long can the rabies virus live outside the host?

When it comes to the rabies virus, it cannot live outside the body of the vector host for more than a few seconds. The moment the virus is put out of the salivary glands of the animal, the virus will die. Rabies is affected by temperature and moisture similar to other viruses. Aerosol transmission is exceptionally rare, though possible. Contamination of this type is almost exclusive to laboratory workers and people who handle infected animals. Rabies can not live independently in an aerosolized...
Asked in Cold and Flu, Genetics, Viruses (biological)

How do viruses reproduce?

Lytic cycle is one of the mode used by phages like T4 phage. In general, virus need its host to propagate (replicate may be right, reproduce may not). Virus infect the host cells, insert its genetic material (can be RNA or DNA), integrate them into the host genome for the production of viral proteins and its own genetic material. They packages in the cytoplasm and leave the host. ...
Asked in Cold and Flu, Infectious Diseases, Viruses (biological)

How do you avoid catching a cold or flu?

To Avoid Catching a Cold or Flu 1. The number one best way to prevent the flu is to get a flu shot every year. 2. Keep your mucous membranes (nostrils, mouth, eyes) moist with proper hydration. 3. Clean your hands. When soap and warm water are not available, alcohol-based disposable hand wipes or gel sanitizers (at least 60% alcohol) may be used. 4. Avoid touching your face, eyes, nose, or mouth. 5. Drink plenty of fluids. Water flushes your system, washing out the poisons as...
Asked in Conditions and Diseases, Cold and Flu, Infectious Diseases, Cat Health, Swine Flu (H1N1/09), Viruses (biological)

Can cats get the flu from humans?

Cats can, and do get the flu. However, they cannot catch the flu from humans because that particular viral strain doesn't cause the severe immune system response that causes the symptoms you and me feel as the "flu" and thus, the virus cannot propagate in felines. Like most mammals, there is a particular strain of the flu virus called "feline influenza" which does cause severe flu symptoms in all types of cats. We cannot catch the flu from cats and they cannot...
Asked in Microbiology, Viruses (biological)

Is pilus a virus?

No. It is a hairlike appendage on some bacteria.
Asked in Health, Chickenpox, Viruses (biological)

Is chickenpox lysogenic or lytic?

The virus that causes chickenpox (varicella zoster virus) is lysogenic.
Asked in Microbiology, Viruses (biological)

What is a virus?

A virus is an obligate intracellular parasitic acellular microorganism, consisting of protein coat and nucleic acid DNA or RNA and may be enveloped or not. It is a particle that is not defined as being alive, that goes inside you and attacks your cells, and inserts their DNA into your cell, so that your cell makes more of the virus instead of making more of itself. If you mean in computers, its when malicious code is running in your computer and doing...
Asked in Conditions and Diseases, Cold and Flu, Bronchitis, Viruses (biological)

Can you have bronchitis and the flu at the same time?

Yes, you can! Bronchitis can also occur after the flu has passed or is passing, as your alveoli may not be able to get rid of all the germs from the flu and then it may develop into a bacterial infection... bronchitis. You could also contract the diseases separately! ...
Asked in Cold and Flu, Viruses (biological)

What is another name for the flu?

Influenza or grippe are two other names, see the related question in the related question section for more information (in the swine flu question). ...
Asked in Microbiology, Viruses (biological)

How do you identify a virus?

Many types of virus can be identified experimentally either by there morphology using a scanning electron microscope(SEM) which allows for the detection of the number of capsomers and overall shape and symmetry of the virus. Or by an ELISA type testing based on antigen specificity. You can only identify a virus through a scanning electron microscope, because they are much smaller than bacteria and cannot be seen by the naked eye. ...
Asked in Microbiology, Viruses (biological)

A type of virus that infects bacteria is an?

The type of virus that infects a bacteria is called a bacteriophage. An example of such a bacteriophage is the T3 bacteriophage. ...
Asked in Cold and Flu, Antibiotics, Viruses (biological)

Would you take antibiotics for the flu?

No, not to treat the flu itself because antibiotics don't affect viruses, they are used only for bacterial infections. Sometimes people with the flu develop secondary bacterial infections and then antibiotics may be given to treat or prevent this complication. See the related question below for how influenza is treated. ...
Asked in Cold and Flu, Viruses (biological)

How long does the flu last?

According to information from the US Centers for Disease Control and Prevention (CDC): "The typical incubation period for influenza is 1-4 days (average: 2 days). Adults shed influenza virus from the day before symptoms begin through 5-10 days after illness onset. However, the amount of virus shed, and presumably infectivity, decreases rapidly by 3-5 days after onset in an experimental human infection model. Young children also might shed virus several days before illness onset, and children can be infectious for 10 or more days...
Asked in Microbiology, Viruses (biological)

Does a virus has an outer protein coat?

A virus has a protective protein coating called the capsid. The capsid is a cover for the genetic material inside, either RNA or DNA. ...
Asked in Slugs and Snails, Viruses (biological), Warts

Can snail slime cure warts?

Snail slime contains mucus. It is rich in proteins and is now being used in cosmetics. It is thought to be a hoax that this can cure warts. Warts are caused by a virus. There are many anti-wart compounds that are over the counter (OTC) to try. ...
Asked in Health, Viruses (biological)

What are viruses inner core made of?

The inner core of a virus is made up of genetic material that contains directions for creating new viruses. ...
Asked in Viruses (biological)

Is a virus living or non-living?

A virus is non living as according to the modified Cell Theory, cells are defined as the basic building blocks of life, while viruses are not made up of cells. In fact, a virus is nothing more than a protein capsid encapsulating genetic material (either DNA or RNA), hence a virus would more correctly be termed as an infectious particle. Viruses are non-living. Virus are living object because: They possess genetic material DNAs or RNAs. They can reproduce and mutate. They react to stimuli...
Asked in Viruses (biological), Ebola Hemorrhagic Fever

What body system does Ebola hf affect?

Symptoms start two days to three weeks after contracting the virus, with a fever, sore throat, muscle pain, and headaches. Typically nausea, vomiting, and diarrhea follow, along with decreased functioning of the liver and kidneys. Around this time, affected people begin to bleed both within the body and externally. Prolonged cases are often complicated by the occurrence of long-term problems, such as inflammation of the testicles, joint pains, muscle pains, skin peeling, or hair loss. Eye symptoms, such as light sensitivity, excess tearing,...