It is a viral disease caused by the Epstein-Barr virus.
Between 50 and 80% of adults have antibodies for this disease because most of them had undergone this pathology in a subclinical way (a few symptoms or symptoms of the unspecific type).
In developing countries the infection takes place in children younger than those in developed countries.
Transmission is through salivary exchange, contact with contaminated objects and, less frequently, through blood.
The exact period of transmission of the virus is unknown but we believe the incubation period is of 30 to 50 days.
The state of the patient depends on the age and covers from non-symptomatic infections to fatal cases.
Young children are frequently non-symptomatic.
Adolescents and older children present more defined symptoms: angina, fever, ganglion and liver inflammation. A percentage of the patients have cutaneous eruption and a bigger spleen (splenomegaly).
It is important to keep these patients under control to investigate probable complications of the disease (neurological and pulmonar complications, spleen breakage, anemia, pancreatitis, etc)
The treatment is symptomatic (antifebriles, adequate hydration, antibiotics when there are bacterial complications, etc) and, logically, medical control.
There is no measure to avoid the infection.