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q bank micro and immuno set #2 03212006


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Correct Answer
A 38-year-old primigravid woman in her second trimester of pregnancy complains to her obstetrician of urinary frequency and burning. A clean catch specimen of urine is obtained and submitted to the laboratory for culture, Gram's stain, and biochemical an
Cytoplasmic membrane
An autopsy is performed on a man who suddenly began vomiting voluminous quantitis of blood and exanguinated. The man's stomach is presnted in the accompanying photograph. Which of the following organisms is most likely implicated in the pathogenesis of t
Helicobacter pylori
A new vaccine developed by the military protects recruits against respiratory infections causes by adenovirus serotypes 4 and 7. The virus, which is living and non-attenuated, is delivered in an enteric coated capsule. It establishes an asymptomatic inte
A 73-year-old woman with a history of diabetes presents with left ear pain and drainage of pus from the ear canal. She has swelling and tenderness over the left mastoid bone. Which of the following microorganisms is the most likely causative agent?
Pseudomonas aeruginosa
A 7-year-old girl develops behavioral changes, and her performance in school begins to deteriorate. Several months later, she develops a seizure disorder, ataxia, and focal neurologic symptoms. She is eventually quadriparetic, spastic, and unresponsive.
A 36-year-old farmer has been exposed to poison ivy on several different occasions and usually develops severe skin lesions. He enrolls in an immunological study at an urban medical center. A flow cytometric measurement of T cells rev3eals values within
An 8-year-old boy is brought to the emergency room with a 3-day history of fever of 102 degrees F and abdominal pain. He also complains of pain in hbis right knee and right elbow. He was seen four weeks ago because of a sore throat and a rash. A throat c
sensitivity to bacitracin
A traveler to a foreign country develops acute lymphatic filariasis four months after his return to the United States. His symptoms include scrotal inflammation, itching, and localized scrotal swelling and tenderness of the inguinal lymph nodes. Which of
Antibody-dependent cell-mediated cytoxocitiy
A Malaysian famiy is referred to a specialist in Memphis, Tennessee for evaluation of a possible genetic immunologic defect. 4 of 6 of the members of this family have displayed increased susceptibility to extracellular bacteria and elevated serum levels
Completion of the classic pathway to the splitting of C3
A 15-year-old boy presents to his physician with several weeks of slowly worsening pruritis of both of his feet. He is otherwise well and taking no medications. On examination, he has bilateral, erythematous, dry scaling lesions that are most obvious in
Branching, septate hyphae with arthroconidia
A 12-year-old girl presents with a skin abscess. The causative organism is found to be Staphylococcus aureus. Over the past year, she has had several similar abscesses, as well as two bouts of aspergillosis. Which of the following is the most likely expl
Defective NAPDH oxidase
A 38-year-old woman with SLE is seen by her family physician. On her last visit, he sent blood to the laboratory for an antinuclear antibody panel. Based on the results, he recommends that the patient by seen by a nephrologist. A high titer of autoantibo
Double-stranded DNA (dsDNA)
A small 9-month-old male with a history of recurrent pyogenic infections is seen in a clinic. Immunoglobulin levels and a CBC are performed. The CBC is normal except for slight neutropenia and thrombocytopenia. Determination of immunoglobulin levels indi
CD40 ligand (CD40L) on the T cell
A 21-year-old college student from Connecticut with a past history of Lyme disease presents with chronic pain and swelling in his right knee. He states that he has had problems with the knee for the past two years. Which of the following HLA alleles woul
A 33-year-old woman presents with fever, vomiting, severe irritative voiding symptoms, and pronounced costovertebral angle tenderness. Laboratory evaulation reveals leukocytosis with a left shift; blood cultures indicate bacteremia. Urinalysis shows pyur
Ampicillin and gentamicin
A 44-year-old white female presents with severe Raynaud's phenomenon, dysphagia, and sclerodactyly, and facial and palmar telangiectasis. Which of the following autoantibodies is most likely to be present in this patient?
Anti-centromere antibody
A 6-year-old boy presents with a rash that started as a superficial accumulation of several small vesicles on his legs below the knees. He is afebrile and appears normal, other than these lesions. The child lives in the suburbs and often plays outside in
Catalase test
A research laboratory is studying mechanisms of immunity to Babesia microti in mice. Cells from immune mice are separated by flow cytometry, using fluorescently labeled anibodies directed against a variety of cell surface markers. Infected red blood cell
Which of the following is more frequently associated with Klebsiella pneumoniae than with Pseudomonas aeruginosa?
upper lobe cavitation
A 46-year-old woman presents with complaints of feeling as if she has "sand in her eyes" and reports difficulty swallowing such foods as crackers or toast. A biopsy of an enlarged salivary gland reveals lymphocytic infiltration. There is hperpl
Rheumatoid factor and anti-SS-A antibody
A 26-year-old obstetric patient becomes acutely ill during her first trimester with infectious mononucleosis-like symptms, but her heterophil antibody test was negative. A careful history reveals that the family has two cats in the house. The approprate
An infectious disease specialist in New York City is conducting a study of the effect of cytokine administration on the progression of multiple drug-resistant tuberculosis in HIV-positive patients. A variety of cytokines produced by recombinant DNA are a
A 39-year-old black man presents with complaints of anorexia, malaise, fatigue, dark urine, and upper abdominal discomfort. He admits to homosexuality, but denies blood transfusions, alcohol intake, or intravenous drug abuse. On physical examination, the
He will become HBsAg negative

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