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JACI Primer 2026 Newest Exam With Verified
Questions with 100% Detailed Answers||Already
Graded A+||Brand new!!!
Question 1. Which of the following statements concerning
severe combined immunodeficiency (SCID) is true?
A. SCID is characterized by severe deficiency of T cells.
B. SCID is characterized by severe deficiency of T and B
cells.
C. SCID is characterized by severe deficiency of T, B, and
natural killer cells.
D. SCID is characterized by severe deficiency of both
lymphocytes and neutrophils. - ANSWER-1. Answer: A
Explanation: SCID includes a heterogeneous group of
disorders characterized by severe defects in T-cell
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development. Some (but not all) forms of SCID also have
defects in B-cell development, natural killer cell
development, or both, whereas impaired myeloid
differentiation is restricted to a few rare forms of SCID.
Regardless of the presence or absence of B cells, patients
with SCID have a severe defect in antibody production,
reflecting a lack of T lymphocytes.
Question 3. The expected finding in bronchoalveolar
lavage differential count in a patient with acute
hypersensitivity pneumonitis is —
A. macrophages of 95%.
B. lymphocytes of 60%.
C. eosinophils of 40%.
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D. polymorphonuclear leukocytes of 60%. - ANSWER-3.
Answer: B
Explanation: In BAL from normal individuals, the usual cell
percentages are 83-88% macrophages; 7-12% lymphs, 1-
2% PMNs; rare basophils, eosinophils or ciliated cells. In
patients with acute HP lymphocytes represent 40-60% of
total cells, usually with a CD81 predominance. Eosinophils
can be significantly increased in diseases such as CSS,
APBA and acute eosinophilic pneumonia.
Question 4. A characteristic feature of the reactive airways
dysfunction syndrome (RADS) is that —
A. theperiodforsensitizationisusually1to5yearsbeforeonset.
B. respiratory symptoms resolve by 3 months after
exposure.
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C. bronchial hyperresponsiveness is present.
D. bronchial biopsy demonstrating eosinophilia is
consistent
with the diagnosis. - ANSWER-4. Answer: C
Explanation: The clinical criteria for the diagnosis of
RADS, as published by Brooks in 1985 include onset of
symptoms occurred after a single specific exposure
incident, onset of symptoms occurred within 24 hours after
exposure and persisted for at least 3 months,
methacholine challenge testing was positive, symptoms
simulating asthma, and other types of pulmonary disease
were ruled out.
JACI Primer 2026 Newest Exam With Verified
Questions with 100% Detailed Answers||Already
Graded A+||Brand new!!!
Question 1. Which of the following statements concerning
severe combined immunodeficiency (SCID) is true?
A. SCID is characterized by severe deficiency of T cells.
B. SCID is characterized by severe deficiency of T and B
cells.
C. SCID is characterized by severe deficiency of T, B, and
natural killer cells.
D. SCID is characterized by severe deficiency of both
lymphocytes and neutrophils. - ANSWER-1. Answer: A
Explanation: SCID includes a heterogeneous group of
disorders characterized by severe defects in T-cell
,2|Page
development. Some (but not all) forms of SCID also have
defects in B-cell development, natural killer cell
development, or both, whereas impaired myeloid
differentiation is restricted to a few rare forms of SCID.
Regardless of the presence or absence of B cells, patients
with SCID have a severe defect in antibody production,
reflecting a lack of T lymphocytes.
Question 3. The expected finding in bronchoalveolar
lavage differential count in a patient with acute
hypersensitivity pneumonitis is —
A. macrophages of 95%.
B. lymphocytes of 60%.
C. eosinophils of 40%.
,3|Page
D. polymorphonuclear leukocytes of 60%. - ANSWER-3.
Answer: B
Explanation: In BAL from normal individuals, the usual cell
percentages are 83-88% macrophages; 7-12% lymphs, 1-
2% PMNs; rare basophils, eosinophils or ciliated cells. In
patients with acute HP lymphocytes represent 40-60% of
total cells, usually with a CD81 predominance. Eosinophils
can be significantly increased in diseases such as CSS,
APBA and acute eosinophilic pneumonia.
Question 4. A characteristic feature of the reactive airways
dysfunction syndrome (RADS) is that —
A. theperiodforsensitizationisusually1to5yearsbeforeonset.
B. respiratory symptoms resolve by 3 months after
exposure.
, 4|Page
C. bronchial hyperresponsiveness is present.
D. bronchial biopsy demonstrating eosinophilia is
consistent
with the diagnosis. - ANSWER-4. Answer: C
Explanation: The clinical criteria for the diagnosis of
RADS, as published by Brooks in 1985 include onset of
symptoms occurred after a single specific exposure
incident, onset of symptoms occurred within 24 hours after
exposure and persisted for at least 3 months,
methacholine challenge testing was positive, symptoms
simulating asthma, and other types of pulmonary disease
were ruled out.
