is an upper respiratory infection caused by a virus?
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Introduction. A variety of viruses and bacteria can cause upper respiratory tract infections. These cause a variety of patient diseases including acute bronchitis, the common cold, influenza, and respiratory distress syndromes.
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Cold symptoms A cold is a viral upper respiratory tract infection that typically affects the nasal part of the respiratory system. The infection is usually mild and goes away without treatment. Symptoms may include a runny nose, headache, and sneezing. About half of patients can also experience a cough or sore throat.
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Symptoms are caused by inflammation of the mucous membranes in the upper respiratory tract. Other symptoms include: fever. fatigue.
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Croup is most commonly caused by a virus. It is sometimes, but rarely, caused by bacteria, allergies, or reflux from the stomach. Viruses that are known to cause croup are: Parainfluenza virus.
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Sneezing is a common symptom of upper respiratory infections (URIs) in cats. Often referred to as the “common cold” or the “cat flu”, upper respiratory infections can be viral, bacterial and even fungal, although that's less common.
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What Causes the Flu? The flu is caused by influenza viruses that infect the nose, throat, and lungs. These viruses spread when people with flu cough, sneeze or talk, sending droplets with the virus into the air and potentially into the mouths or noses of people who are nearby.
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A URI, or upper respiratory infection, is an infection which can lead to a runny nose and congestion. In a young infant, the small size of the air passages through the nose and between the ear and throat can cause problems not seen as often in larger children and adults.
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Viral sinus infections are caused by viruses that infect the lining of your nasal cavity, or generally the ear nose and throat. It is most often caused by a viral upper respiratory infection (URI, also known as the common cold).
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Viral Sinus Infection. Viral sinus infections are caused by viruses that infect the lining of your nasal cavity, or generally the ear nose and throat. It is most often caused by a viral upper respiratory infection (URI, also known as the common cold).
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Symptoms of upper respiratory tract infections include clear or colored discharge from the eyes or nose, coughing, sneezing, swelling of the mucous membranes around the eyes (conjunctivitis, see Figure 2), ulcers in the mouth, lethargy, and anorexia. In rare cases, cats may have trouble breathing.
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Sinusitis. Medically known as rhinosinusitis, a sinus infection occurs when your nasal cavities become infected, swollen, and inflamed. Sinusitis is usually caused by a virus and often persists even after other upper respiratory symptoms are gone. In some cases, bacteria, or rarely fungus, may cause a sinus infection.
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Infectious bronchitis can also be due to bacteria, especially if it follows an upper respiratory viral infection. It is possible to have viral and bacterial bronchitis at the same time.
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Viral Causes of URI As we discussed earlier, viral and bacterial infections of the upper respiratory tract often occur together. Parainfluenza is the primary virus that causes URI, but Adeno Type II, Canine Influenza, and Distemper are also causes.
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In This Article Parainfluenza is a common virus that can cause both upper and lower respiratory infections, including colds, bronchitis, croup, and pneumonia. Despite the name, it is not related to influenza (the flu). It is caused by an entirely different virus known as the human parainfluenza virus (HPIV).
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A respiratory infection is a very common viral infection that can affect the nose, throat and airways. It is an extremely contagious infection that can be spread from person to person through sneezing and coughing.
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Q: My cat has an upper respiratory infection. Is it contagious to my dog or my kids? A: In general, most feline upper respiratory infections are caused by viruses that are specific to cats. These viruses are not contagious to other species, including dogs and people.
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Viral respiratory infections (VRIs) include colds, the flu and bronchiolitis. Respiratory means something that affects the lungs and airways (breathing passages). VRIs may cause coughing, sneezing, runny noses, sore throats or fever. Viral means something that is caused by a virus.