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Common variable immunodeficiency
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Common variable immunodeficiency
Common variable immunodeficiency (CVID) is an inborn immune disorder characterized by recurrent infections and low antibody levels, specifically in immunoglobulin (Ig) types IgG, IgM, and IgA. Symptoms generally include high susceptibility to pathogens, chronic lung disease, as well as inflammation and infection of the gastrointestinal tract.
CVID affects males and females equally. The condition can be found in children or teens but is generally not diagnosed or recognized until adulthood. The average age of diagnosis is between 20 and 50.
However, symptoms vary greatly between people. "Variable" refers to the heterogeneous clinical manifestations of this disorder, which include recurrent bacterial infections, increased risk for autoimmune disease and lymphoma, as well as gastrointestinal disease. CVID is a lifelong disease.
The symptoms of CVID vary between those affected. Its main features are hypogammaglobulinemia and recurrent infections. Hypogammaglobulinemia manifests as a significant decrease in the levels of IgG antibodies, usually alongside IgA antibodies; IgM antibody levels are also decreased in about half of those affected.
People with common variable immunodeficiency have trouble fighting off infections due to the lack of antibodies produced, which normally resist invading microbes. Infections are also the leading cause of morbidity and mortality in CVID patients. Due to impaired antibody development, vaccination is not effective for CVID patients.
The prevalence of bacterial complications (42%) is higher in comparison to viral (25%), parasitic (19%) or fungal (3%). Recurring bacterial infections are generally found in the upper and lower areas of the respiratory tract and in gastrointestinal tract. Many who have a recurring lung infection report developing chronic lung diseases and potentially life-threatening complications later in life.
Common infections include:
The microorganisms that most frequently cause infections in CVID are Haemophilus influenzae, Streptococcus pneumoniae, and Staphylococcus aureus. Pathogens less often isolated from those affected include Neisseria meningitidis, Pseudomonas aeruginosa, respectively Giardia lamblia, Salmonella sp., Campylobacter jejuni for gastrointestinal tract.
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Common variable immunodeficiency
Common variable immunodeficiency (CVID) is an inborn immune disorder characterized by recurrent infections and low antibody levels, specifically in immunoglobulin (Ig) types IgG, IgM, and IgA. Symptoms generally include high susceptibility to pathogens, chronic lung disease, as well as inflammation and infection of the gastrointestinal tract.
CVID affects males and females equally. The condition can be found in children or teens but is generally not diagnosed or recognized until adulthood. The average age of diagnosis is between 20 and 50.
However, symptoms vary greatly between people. "Variable" refers to the heterogeneous clinical manifestations of this disorder, which include recurrent bacterial infections, increased risk for autoimmune disease and lymphoma, as well as gastrointestinal disease. CVID is a lifelong disease.
The symptoms of CVID vary between those affected. Its main features are hypogammaglobulinemia and recurrent infections. Hypogammaglobulinemia manifests as a significant decrease in the levels of IgG antibodies, usually alongside IgA antibodies; IgM antibody levels are also decreased in about half of those affected.
People with common variable immunodeficiency have trouble fighting off infections due to the lack of antibodies produced, which normally resist invading microbes. Infections are also the leading cause of morbidity and mortality in CVID patients. Due to impaired antibody development, vaccination is not effective for CVID patients.
The prevalence of bacterial complications (42%) is higher in comparison to viral (25%), parasitic (19%) or fungal (3%). Recurring bacterial infections are generally found in the upper and lower areas of the respiratory tract and in gastrointestinal tract. Many who have a recurring lung infection report developing chronic lung diseases and potentially life-threatening complications later in life.
Common infections include:
The microorganisms that most frequently cause infections in CVID are Haemophilus influenzae, Streptococcus pneumoniae, and Staphylococcus aureus. Pathogens less often isolated from those affected include Neisseria meningitidis, Pseudomonas aeruginosa, respectively Giardia lamblia, Salmonella sp., Campylobacter jejuni for gastrointestinal tract.