Allergy and Immune Flashcards
(452 cards)
Up to which number of URIs/year in child consider common, normal healthy and not need for advanced investigation?
5-6
Unlucky»_space; 11-12 URIs/year
After 1 year the number decrease as Eustachian tube become tilting instead of it’s streaten.
Otitis media complicates URIs IN —- % of cases.
30-50%
When to suscpect immunedificiency baby for further investigation?
Red flags for immunodeficiency.
- Positive family history.
- Failure to thrive.
- Increasing frequency and severity of infections as children become older.
- Recurrent serious infections.
- Otitis media (>8episodes/year)
or complecated by mastoiditis. - Pneumonia (>1 episode/year).
- Enteric infections.
- Unusual sites of infection.
- opportunistic infections.
- Persistent Thrush in a child >1 year of age.
Common types of primary immunodeficiency include _____ and _____ disorders.
T-cell, B-cell.
T-cell generate in ____ and activate in ____ and differentiate into : ___,___
Bone marrow, Thymus and differentiate into T helper, T cytotoxic.
Maturation of B-cell done by ____ and give ____.
CD4+T cell ( T-Helper), plasma cell.
Done in lymphatic tissue espicially ( Tonsils ).
Function of T-cytotoxic cell in immunity is:
- Destroy virus-infected cells and tumor cells.
- Transplant rejection.
Function of T-helper cell is :
Maturation of B-cell into plasma cell (giving immunoglubulins) which responsible of opsonization or coating.
Immunoglubuline is Antigen presenting cell.
Which type of T-cell is responsible for maturation of B-cell.
CD4 T-helper cell.
Enumerate possible types of immunoglubulins.
IgM, IgA, IgG, IgE, IgD.
MAGED (ماجد)
Defect in which type of immunity presented at birth ?
cell-mediated immunity.
T-cell defects.
As it is not transmitted from mother to baby.
At which time defects in humeral immunity become noticed?
present at 6 m of age or older.
Before that :Mother dependent immunity
Defects in T-cells may include:
- Viral infections.
- Fungal infections.
- Mycobacteria PCP (PJP).
Bacterial infections and protozoal infections is commonly affect ____ immunity.
Humeral
B-cell immunity.
Which type of immunity cells is the 1st line defense against Enterovirus?
B-cells.
Humeral immunity.
Like bacterial and protozoal infections.
True or False: Primary immunodeficiency is present at birth.
True
Severe combined immunodeficiency (SCID) defined as:
Absence of all immune function, cell-mediated and humoral.
Possible genetic mutations in Severe combined immunodeficiency (SCID).
- X-linked.
- AR.
- Sporadic.
Autosomal recessive SCID is defeciency in which enzyme?
Adenosine Deaminase
Defeciency» build toxic metabolites.
Enumerate possible keys to diagnose Severe combined immunodeficiency (SCID).
- +ve family history.
- Present before 3 months of age.
- Recuurent infection (Pneumonia).
- Failure to thrive.
- Chronic diarrhea.
- Dermatitis.
- No tonsils, lymph nodes, or adenids.
- Very small thymus.
Which is the most diagnostic features of SCID that diffrentiate it from other immune defeciency babies?
- Usually presents before 3 months of age and die by 2 years.
- Small thymus with abcent tonsils.
- Abcent antibodies so there is no antibody response to vaccination.
- Sever lymphopenia from birth.
- Sever decrease or abcent immunoglubulins.
Which is the recommended treatment for SCID ?
Stem cell (BM) transplant.
Discribe etiology of X-linked Agammaglobulinemia.
X-linked» Boys
A» no (Abcence)
gammaglobulinemia» Ig (B-cell)
Defect in B lymphocyte development due to Bruton tyrosine kinase mutation
Almost No circulating B cell.
When Agammaglobulinemia start to noticed?
at 6-9 months old
when maternal circulating antibodies disappear.