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A rare progressive disease that begins as a primary Epstein-Barr virus (EBV) infection. In this type of infection, the body makes too many lymphocytes (lymphoproliferative disease) for a period of more than 6 months duration. Lymphocytes are a type of white blood cell. They are an importantpart ofthe immune system because they help fight off diseases and protect the body from infection byproducing antibodies against viruses or bacteria and regulating immune responses. In CAEBV there are many antibodies againstEBV in the blood.Most people (about 95% of adults) get infected with EBV at some point in their lives, and never have any health problems.However, EBV can cause infectiousmononucleosis and other illnesses, and has a role in various autoimmune diseases and some types of cancer. While most infections occurring during childhood do not cause any symptoms,EBV infection in adolescents or young adults can often result in mononucleosis.After an EBV infection, the virus becomes latent (inactive) in the body, and, in some cases, the virus may reactivate. This does not always cause symptoms, but people with weakened immune systems are more likely to develop symptoms if EBV reactivates.In rare cases, people infected with EBV develop chronic active EBV virus infection(CAEBV) without apparent immunodeficiency. Most cases of CAEBV have been reported from Japan. These patientshave some of the complications found in otherwise-healthy patients with acute EBV infection, but unlike healthy patients, these complications persist and progress. Symptoms of CAEBV most often include fever, liverdysfunction, an enlarged spleen (splenomegaly), swollen lymph nodes (lymphadenopathy), and low numbers of platelets (thrombocytopenia) as well as high EBV-DNA load in the blood. Other features that appear in more than 10% of patients include enlarged liver (hepatomegaly), anemia, hypersensitivity to mosquito bites, rash, oral ulcers, hemophagocytic syndrome, coronary artery aneurysms, liver failu
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Os sintomas variam de pessoa para pessoa. Abaixo estão as 21 características clínicas mais associadas, ordenadas por frequência.
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