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The respiratory syncytial virus (RSV) is a major cause of infections of the breathing passages and lungs in infants and young children., It is one of many viruses that can cause  bronchiolitis (an infection of the bronchioles, the small breathing tubes of the lungs).

Respiratory virus  is transmitted from an infected child by secretions from the nose or mouth of an infected person, by direct contact, or airborne droplets. The period of greatest contagiousness is in the first few days of the infection. The incubation period of RSV ranges from 2 to 8 days, commonly 4 to 6 days. Annual epidemics take place during the winter and early spring.

Signs and Symptoms

Most children with respiratory infections have only mild symptoms, typically similar to the symptoms of a common cold. In children younger than 2 years, the infection may progress to symptoms more commonly found in bronchiolitis.

  • Initially, the child will have a runny nose, mild cough, and in some cases, a fever.
  • Within 1 to 2 days, the cough will get worse.
  • At the same time, the youngster's breathing will become more rapid and difficult. He may wheeze each time he breathes out.
  • Your child will have a hard time drinking because he is using so much energy breathing. Even swallowing becomes very difficult for these infants.
  • His fingertips and the area around his lips may turn a bluish color, a sign that his strained breathing is not delivering enough oxygen to his bloodstream.

What You Can Do

In the early stages of a respiratory infection, help ease your child's cold-like symptoms. Gentle suctioning of the nose may be useful to clear the nostrils. You should not use medications as they may cause side effects and are not effective in the young child.

Mist has not been shown to be useful. Hot-air vaporizers should be avoided because of the risk for scald burns, and cool-mist vaporizers are often contaminated with molds. Make sure your child drinks enough liquid to prevent dehydration.  

When to Call Your Pediatrician or seek treatment at a Pediatric Urgent Care

Contact a pediatrician immediately if your baby or child:

  • Has breathing difficulties
  • Is younger than 2 or 3 months and has a fever
  • Shows signs of dehydration, such as a dry mouth, crying without tears, and urinating less often

How Is the Diagnosis Made?

Your children's medical center may order laboratory tests of specimens taken from your child's nose and throat to see if RSV or another virus is present. The virus can be grown in special cultures, or parts of the virus can be identified by rapid tests.

Treatment

There is no effective treatment for RSV or other viruses (other than influenza). Observation for worsening is necessary. If worsening occurs, you should call your doctor. Some youngsters with bronchiolitis may have to be hospitalized for treatment with oxygen. If your child is unable to drink because of rapid breathing, he may need to receive intravenous fluids. On rare occasions, infected babies will need a respirator to help them breathe.

Antibacterials are not used for treating viral infections.

What Is the Prognosis?

Most children with viral infections are well on their way to recovery in about a week, and almost all fully recover. Nearly all children are infected with RSV at least once by 2 years of age, and a mild recurrence of the infection throughout life is common. As the child grows, viral infections become less serious than when they were infants and are usually hard to distinguish from a cold.

Prevention

Your child should avoid close contact with other children and adults who are infected with viruses. In child care centers, good hygiene practices should be used by the staff and the children, including frequent and thorough handwashing.  

 

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