Epstein-Barr Virus Infection in Children
Introduction to Epstein-Barr Virus Infection in Children
Epstein-Barr virus (EBV) is a ubiquitous human herpesvirus that infects more than 95% of the world's population. It is the primary cause of infectious mononucleosis (IM) and is associated with various malignancies and autoimmune diseases. In children, EBV infections can range from asymptomatic to severe, with clinical manifestations often differing from those seen in adults.
EBV belongs to the Herpesviridae family and is also known as human herpesvirus 4 (HHV-4). It primarily infects B lymphocytes and epithelial cells, establishing lifelong latency in the host. Understanding EBV infections in children is crucial for accurate diagnosis, appropriate management, and recognition of potential long-term complications.
Epstein-Barr Virus Infection in Children
- What is the causative agent of Epstein-Barr virus infection?
Answer: Epstein-Barr virus (EBV), a member of the Herpesviridae family - What is another common name for EBV infection?
Answer: Infectious mononucleosis or "mono" - At what age do most children acquire primary EBV infection?
Answer: Before 5 years of age in developing countries; adolescence in developed countries - How is EBV primarily transmitted among children?
Answer: Through saliva, hence the nickname "kissing disease" - What is the typical incubation period for EBV infection?
Answer: 4-6 weeks - Which cell type does EBV primarily infect?
Answer: B lymphocytes - What are the three classic symptoms of infectious mononucleosis?
Answer: Fever, sore throat, and lymphadenopathy - How long can fatigue persist after acute EBV infection in children?
Answer: Several weeks to months - What is the most common complication of EBV infection in children?
Answer: Splenic enlargement (splenomegaly) - Which laboratory test is most specific for acute EBV infection?
Answer: EBV viral capsid antigen (VCA) IgM antibody - What is the significance of heterophile antibodies in EBV diagnosis?
Answer: They are present in 85-90% of cases but may be negative in young children - How long can children shed EBV in their saliva after acute infection?
Answer: Intermittently for months to years - What is the recommended treatment for uncomplicated EBV infection in children?
Answer: Supportive care, including rest, hydration, and antipyretics - Which medication should be avoided in children with suspected EBV infection?
Answer: Amoxicillin, due to the risk of developing a rash - What is the role of corticosteroids in treating EBV infection in children?
Answer: Limited to severe cases with airway obstruction or significant autoimmune complications - How does EBV infection affect liver function in children?
Answer: It can cause mild to moderate elevation of liver enzymes - What is the risk of EBV reactivation in immunocompetent children?
Answer: Low, but can occur during periods of stress or immunosuppression - Which malignancy is strongly associated with EBV infection in children?
Answer: Burkitt lymphoma, especially in endemic areas - How does EBV infection present in infants and young children?
Answer: Often asymptomatic or with mild, nonspecific symptoms - What is the significance of atypical lymphocytes in EBV infection?
Answer: They indicate an active immune response to the virus - How long should children with EBV infection avoid contact sports?
Answer: At least 3-4 weeks or until splenomegaly resolves - What is the risk of EBV transmission through blood transfusion?
Answer: Low with current blood screening practices - How does EBV infection affect the immune system in children?
Answer: It causes polyclonal B-cell activation and T-cell expansion - What is the role of antiviral medications in treating EBV infection in children?
Answer: Limited; not routinely recommended for immunocompetent children - Which autoimmune condition is associated with chronic active EBV infection?
Answer: Hemophagocytic lymphohistiocytosis (HLH) - How does EBV infection in children contribute to the development of multiple sclerosis?
Answer: It may increase the risk through molecular mimicry and altered immune responses - What is the significance of EBV nuclear antigen (EBNA) antibodies?
Answer: They indicate past infection and persist for life - How does EBV infection affect school attendance in children?
Answer: It can lead to prolonged absences due to fatigue and other symptoms - What is the risk of developing chronic fatigue syndrome after EBV infection in children?
Answer: Low, but slightly increased compared to other infections - How does EBV infection present in children with X-linked lymphoproliferative syndrome?
Answer: It can cause severe, often fatal, infectious mononucleosis - What is the role of EBV serology in diagnosing nasopharyngeal carcinoma in children?
Answer: Elevated EBV DNA levels can be a marker for this EBV-associated cancer - How does EBV infection affect the development of the immune system in young children?
Answer: It plays a role in shaping the T-cell repertoire and B-cell memory - What is the significance of oral hairy leukoplakia in EBV-infected children?
Answer: It is a rare manifestation, usually seen in immunocompromised patients - How does EBV infection impact vaccination responses in children?
Answer: It may temporarily reduce responses to some vaccines - What is the role of EBV in the development of post-transplant lymphoproliferative disorder in children?
Answer: It is a major causative agent, especially in EBV-naive recipients
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