Measles is best known for causing a rash in childhood, but measles can affect other parts of the body and sometimes occurs in adults. Vaccination has significantly reduced the number of cases in the United States, although isolated outbreaks continue to occur.United States of America, in 2008, measles killed 164,000 children.
Measles is a highly infectious illness caused by a virus. The virus lives in the mucus of the nose and throat of people with this infection. Physical contact, coughing and sneezing can spread the infection. In addition, infected droplets of mucus can remain active and contagious for around two hours. This means that the virus can live outside the body – for example, on surfaces and door handles.
Types of measles
There are two types of measles, each caused by a different virus. Although both produce a rash and fever, they are really different diseases:
Rubeola: The rubeola virus causes “red measles,” also known as “hard measles” or just “measles.” Although most people recover without problems, rubeola can lead to pneumonia or inflammation of the brain (encephalitis).
Rubella:The rubella virus causes “German measles,” also known as “three-day measles.” This is usually a milder disease than red measles. However, this virus can cause significant birth defects if an infected pregnant woman passes the virus to her unborn child.
Measels is caused by an RNA paramyxovirus.Humans are the only nature host.The virus remains in the air in droplet form for several hours ,especially in humid weather.The infection is transferred from infected secretions of the nose,throat and the respiratory tract, during the prodromal period or the early stages of rash (four days before and five days after the appearance of the rash).Measles affects virtually everyone in infancy or childhood between six months and three years of age in developing countries.How can produce the disease:
Both the rubeola and rubella viruses are spread through the respiratory route. This means they are contagious through coughing and sneezing. In fact, the rubeola virus is one of the most contagious viruses known to man. As a result, it can spread rapidly in a susceptible population. Infected people carry the virus in their respiratory tract before they get sick, so they can spread the disease without being aware of it.
If people are immune to the virus (either through vaccination or by having had measles in the past), they cannot get the disease caused by that virus. For example, someone who had rubeola as a child would not be able to get the disease again. Remember that rubella and rubeola are different viruses. An infection with one of these viruses does not protect against infection with the other.
- A run-down feeling
- Red eyes (conjunctivitis)
- Runny nose
- Loss of appetit
Although there is no cure for measles, there are steps that can make the disease more tolerable. These include the following:
- Get plenty of rest.
- Sponge baths with lukewarm water may reduce discomfort due to fever.
- Drink plenty of fluids to help avoid dehydration.
- A humidifier or vaporizer may ease the cough.
Pain relievers and fever reducers such as acetaminophen (Tylenol, Liquiprin Drops, and other brands) and ibuprofen (Advil, Motrin and other brands) can help with symptoms when used according to directions. Remember never to give aspirin to children or teenagers because it may cause a disease known as Reye syndrome.
Because of widespread vaccination of children, both kinds of measles occur much less often than in the past.
- The most effective way to prevent measles is through immunization.
- Children in the United States routinely receive the measles-mumps-rubella (MMR) vaccine according to a published immunization schedule. This vaccine protects against both red measles and German measles. Vaccination (or written refusal) is required for entry into school.
- Doctors usually give the first dose of the measles immunization at 12-15 months of age.
- Doctors give a second dose of the immunization when the child is 4 to 6 years old.
- Although most children tolerate the vaccine well, a few may develop fever and even a rash from five to 12 days after the immunization. Adult women who get the vaccine may notice short-term aching in their joints.
- The vaccine is about 95% effective in preventing measles of either type. That means that a small number of people who get the vaccine may still be able to get measles.
- The vaccine should not be used in people with egg allergies.
- Rarely, the measles vaccine can cause a measles-like illness. This is most common in people with weak immune systems, such as those with advanced HIV or those on chemotherapy. In such patients, the risk of vaccination should be balanced carefully against the risk of getting measles.
- Women who may become pregnant should have a blood test to be sure they are immune to rubella (“German measles”).
- Both types of measles are still common in areas that do not offer immunization and in people who have not been immunized.
- As with all other contagious illnesses, covering the mouth when coughing or sneezing and good hand-washing practices will help prevent the spread of the diseases.
- A special immunization immune globulin may be necessary for certain high-risk people after they are exposed to measles. These include children younger than 1 year, children with weakened immune systems, and pregnant women.
- The use of vitamin A in treatment has been investigated. A systematic review of trials into its use found no significant reduction in overall mortality, but it did reduce mortality in children aged under two years.
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