Mononucleosis

(Infectious Mononucleosis; Mono)

Definition

Mononucleosis is an infectious disease that is associated with fever, fatigue, and swollen lymph glands.
Swollen Glands
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Causes

Mononucleosis is caused by the Epstein-Barr virus (EBV). Found mainly in saliva and mucus, EBV is passed from person to person by intimate behavior, such as kissing.

Risk Factors

Many people get EBV during their lifetime. Factors that increase the likelihood that EBV will develop into mononucleosis include:
  • Contracting EBV after age 10
  • Lowered immune resistance due to other illness, stress, or fatigue
  • Living in close quarters with a large number of people, such as in a college dormitory
One episode of mononucleosis usually produces permanent immunity.

Symptoms

Signs of mononucleosis usually begin 4-7 weeks after you were exposed to the virus. The initial symptoms may be a sense of general weakness that lasts about 1 week. This is followed by symptoms that may include:
  • High fever
  • Severe sore throat/swollen tonsils
  • Swelling of the lymph nodes
  • Fatigue
  • Loss of appetite
  • Muscle aches
  • Abdominal swelling
  • Yellowing of the skin and whites of the eyes— jaundice

Diagnosis

You will be asked about your symptoms and medical history. A physical exam will be done. Your bodily fluids may be tested. This can be done with blood tests.

Treatment

There is no treatment to cure mononucleosis or to shorten the length of the illness. It usually runs its course in 4-6 weeks, although the fatigue may last longer.During the first few weeks after diagnosis, you should avoid contact sports and lifting anything heavy. Inflammation of the spleen from mononucleosis puts you at high risk of splenic rupture. This can require surgery. In rare cases, it can be fatal.It is important to get plenty of rest. Other supportive care may involve:
  • Over-the-counter pain relievers, such as ibuprofen
  • Gargling with warm, salty water
  • Steroids to reduce inflammation in the throat
  • Drinking plenty of fluids

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