ASCP Technologist in Immunology (I) Practice Exam

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• How is the effectiveness of therapy monitored in chronic Hepatitis B infection?
• Which cells are known to be actively phagocytic?
• In a skin test, the development of a wheal and flare is indicative of?
• Based on test results, patient #3 with HBsAg negative and anti-HBc positive signifies what condition?
• A patient's abnormal lymphocytes are positive for CD2 antigen and lack C3 receptors. What can this be classified as?
• What is the recognition unit in the classical complement pathway?
• Avidity may be defined as what?
• In the indirect immunofluorescence method, what is the labeled antibody used to detect antibodies in a patient's serum?
• Which of the following factors is critical in defining the characteristics of an ELISA?
• What determines the specificity of an antibody during antigen detection?
• What does a false positive reaction in a sandwich assay from mouse monoclonal antibody therapy typically indicate?
• In interpreting cold agglutinin titer results, what is indicated by a titer of 1:128 at 4°C?
• Why are IgM antibodies frequently hemolytic?
• In laser flow cytometry, the application of a voltage potential to sample droplets results in what?
• Which cells play a key role in antibody production?
• What two classes of immunoglobulins are primarily involved in antiphospholipid syndrome?
• An example of an organ-specific disease associated with autoimmune antibodies is?
• What clinical relevance do nucleolar patterns hold in ANA tests?
• What is the typical profile for chronic active hepatitis due to hepatitis B virus?
• What is the most commonly used serological indicator of recent streptococcal infection?
• What characterizes the classic antibody response pattern following hepatitis A infection?
• What procedure is described when a substrate is exposed to patient serum, washed, and then anti-human immunoglobulin labeled with a fluorochrome is added?
• Which test is most appropriate for diagnosing late latent or tertiary syphilis?
• Which immunological component is crucial for the adaptive immune response?
• Which live attenuated vaccine is commonly used for human immunization?
• In a quantitative B lymphocyte assay, what is the expected percentage of B lymphocytes among total lymphocytes?
• Which of the following is NOT a consideration in ELISA testing?
• C3b and Fc receptors are present on which types of cells?
• In the anti-double-stranded DNA procedure, what antigen is most commonly utilized?
• The wheal and flare response in allergy testing is primarily due to the release of?
• How does hepatitis C differ from hepatitis A?
• Which laboratory finding is commonly associated with patients suffering from systemic lupus erythematosus?
• What is the initial immune response to fetal infection with rubella?
• Antiphospholipid antibodies associated with autoimmune disorders mainly belong to which immunoglobulin subclasses?
• Polyclonal B cell activation can occur in response to:
• The primary function of natural killer cells is to?
• Which IgG subclass is most efficient at crossing the placenta?
• Which serological test is recommended for detecting antibody in cerebrospinal fluid?
• In the absence of Sm antibodies, which condition is characterized by certain autoantibodies?
• Biological false positive VDRL reactions are commonly encountered in patients with which condition?
• What is the main role of opsonins in the immune response?
• What is the most common humoral immune deficiency disease?
• In flow cytometry, what is the primary characteristic of labeled cells?
• HLA typing results show a father with alleles (8,12) and (17,22) and a mother with (7,12) and (13,27). What is the possible outcome for their child regarding HLA inheritance?
• In ELISA testing, which factors are commonly considered?
• What is the primary role of neutrophils in the immune system?
• The IIF staining pattern that shows a Perinuclear or nuclear staining pattern is typically associated with which autoantibody?
• What symptoms should be excluded from the differential diagnosis of a young female with fever and lymphadenopathy?
• What does a positive result for CD2 antigen indicate in lymphocytes?
• Based on HLA typing, what is the probability of their children developing ankylosing spondylitis?
• Which type of test is primarily used to detect anti-nuclear antibodies?
• What antibodies are typically seen in high titers in patients with chronic active hepatitis?
• The most rapid immediate hypersensitivity reaction is associated with?
• What is the primary advantage of labeled immunoassays compared to unlabeled immunoassays?
• What is a common laboratory test result in patients with autoimmune hepatitis?
• What is a common serological test for syphilis besides FTA-ABS?
• Which antigen is associated with the diagnosis of Ankylosing spondylitis?
• What determines the specificity of an immunoassay?
• What qualities characterize acquired immunity?
• Which high-sensitivity test is preferred for detecting hepatitis B surface antigen?
• What is the term for a combined immunodeficiency disease characterized by loss of muscle coordination?
• What complication is associated with hereditary deficiency of late complement components (C5, C6, C7, or C8) upon exposure?
• What is the primary target in organ-specific autoimmune diseases?
• How are rheumatoid factors defined?
• What can polyclonal B cell activation induce?
• Antihistamines like Benadryl primarily function by?
• What type of antibodies are tested during the acute phase of Hepatitis B infection?
• What key structural difference distinguishes immunoglobulin subclasses?
• Hereditary deficiency of early complement components (C1, C4, and C2) is associated with which syndrome?
• What condition is associated with the highest stringency for DNA probe hybridization?
• Delayed hypersensitivity may be induced by?
• MHC class I molecules include which of the following proteins?
• Which marker indicates recovery and immunity from hepatitis B virus infection?
• Which acute phase reactant has the fastest response time?
• What is the expected total number of T cells based on a WBC count of 10.0 x 10^3/µL and 40% T cells?
• What is the main action performed during immunofixation electrophoresis?
• Which immunoglobulin class is associated with the secretory component?
• What type of reaction is expected when soluble antigen is added to homologous antibody?
• A speckled pattern in the indirect fluorescent anti-nuclear antibody test may indicate the presence of which antibodies?
• In laboratory testing, sensitivity is defined as what percentage?
• If a patient's serum shows a positive speckled pattern in an anti-nuclear antibody test, what additional test should be performed?
• Measurement of serum levels of which immunoglobulin is used as a screening test for multiple allergies?
• Which type of cells are responsible for producing antibodies?
• What term describes normal serum constituents that increase rapidly during infection?
• Treatment of IgG with papain produces how many fragments from each immunoglobulin molecule?
• What indicates the recovery phase of acute hepatitis B virus infection?
• What is indicated by a positive result in the VDRL test?
• Hairy cell leukemia exhibits immunologic and functional features typical of which cells?
• What immunoglobulin concentration is excessively increased in patients with Waldenström macroglobulinemia?
• Which of the following is the primary function of C-reactive proteins?
• The antigen used in the flocculation test for syphilis is composed of which components?
• Wiskott-Aldrich syndrome primarily affects which demographic?
• A 37-year-old male with flu-like symptoms is likely diagnosed with which condition after testing?
• Which type of immunity includes anatomical barriers and physiological responses?
• When testing sera for IFA-ANA, what is the best storage temperature for samples to be tested 6 days after drawing?
• The presence of anti-nuclear antibodies (ANA) is most commonly associated with which condition?
• A patient with a B-cell deficiency will most likely exhibit which of the following?
• What is the significance of having a positive ANA test?
• What is the significance of a 1:5120 ANA titer in a patient?
• How does a temperature of 20°C affect VDRL and RPR test results?
• Which type of hypersensitivity is characterized by antibody-mediated cell damage?
• A nurse developed fatigue and fever after caring for a hepatitis patient. What finding is likely in this nurse?
• What is a typical symptom of Hepatitis C infection as presented in a clinical case?
• High titers of which type of antibodies are typically found in thyroid disease?
• Potent chemotactic activity in the complement system is associated with which component?
• What is the ratio of kappa to lambda light chain producing cells in normal individuals?
• Which immunoglobulin classes are typically found on the surface of circulating B lymphocytes?
• In pernicious anemia, which antibody is characteristically detected?
• An immunofluorescence test using a reagent antibody directed against the CD3 surface marker identifies which cell type in human peripheral blood?
• Which of the following is NOT a symptom associated with rheumatoid factor?
• Chronic transplant rejection is primarily a response involving which processes?
• The antibody idiotype is dictated by which part of the immunoglobulin?
• What is the significance of equivocal test results in the context of Lyme disease?
• In a positive antistreptolysin "O" enzyme inhibition test, what is the significance of the antistreptolysin O?
• A kidney transplant from an unrelated donor is referred to as what type of transplant?
• What cellular mediator is most associated with immune complex tissue injury?
• Which class of immunoglobulin functions as an antigenic receptor site on the surface of immature B lymphocytes?
• Which procedure is routinely used for detecting hepatitis B surface antigen (HBsAg) due to its high sensitivity?
• In which condition would you expect high levels of specific antibodies to form?
• What condition is suggested by the test results indicating low CD4 percentages?
• Which class of antibodies is primarily involved in allergic reactions?
• What is an important marker for immature B cells in patients with acute lymphocytic leukemia (ALL)?
• Anti-nuclear antibody tests are primarily utilized to help diagnose which condition?
• Which immunoglobulin class can cross the placenta from mother to fetus?
• Which laboratory test is most likely to be ordered to evaluate systemic lupus erythematosus?
• Which class does rheumatoid factor most commonly belong to?
• Which immunoglobulin is the most efficient at agglutination?
• What is the best indicator of an acute infection with hepatitis A virus?
• In the context of hepatitis B, what does HBeAg positivity imply?
• In the FTA-ABS test, what does a beaded pattern of fluorescence along the treponeme indicate?
• What are haptens?
• How does the initiation of the alternative complement pathway differ from the classical pathway?
• In a differential count of leukocytes showing 55% neutrophils and 3% monocytes, what is the expected number of T cells assuming 85% recovery?
• What class of antibodies is responsible for causing hemolytic disease of the newborn?
• What type of antibodies are typically produced in response to a viral infection like rubella in a fetus?
• HLA-B8 Antigen has been associated with which pair of diseases?
• Which immunoglobulin class is indicative of neonatal infection in infants at birth?
• What is the main purpose of using a primary antibody with fluorescent conjugate in direct immunofluorescence?
• What activity is primarily associated with the C3B component in the complement system?
• Immunoassays are based on which fundamental principle?
• In direct immunofluorescence for Legionella pneumophila, what is used to detect the patient sample?
• Which of the following conditions is commonly assessed using anti-nuclear antibody testing?
• Selective IgA deficiency is associated with an increased risk of which type of conditions?
• In chronic hepatitis B infection, what does the presence of IgM anti-HBc suggest?
• What is the function of B lymphocytes in the immune response?
• What describes an antigen-antibody precipitation reaction of non-identity?
• How is the absolute CD4 cell count calculated using the given data?
• Which immune response plays a critical role immediately following fetal rubella infection?
• In an indirect fluorescent anti-nuclear antibody test, what does a homogenous pattern indicate?
• What results best correlate with a positive anti-nuclear antibody test showing a titer of 1:320 with a peripheral pattern?
• Immediate hypersensitivity reactions generally occur within what time frame after exposure?
• What is the test of choice for a suspected anthrax lesion?
• Which complement component is known as a strong chemotactic factor and an anaphylatoxin?
• Which condition is most frequently associated with an appositive ANA pattern of anti-centromere antibodies?
• What is a hallmark of Sezary syndrome?
• What are the signs that may suggest a patient has Lyme disease, as per the clinical vignette?
• What is used as the substrate in a classical ELISA test?
• Tumor Associated Transplantation Antigens (TAAs) can be found in which of the following?
• Which of the following best describes the FTA-ABS test process?
• Immunoediting describes three phases. Which of the following is NOT one of the phases?
• Skin and mucus are examples of which type of immunity?
• Which of the following describes the role of the conjugate in an ELISA?
• Immunodeficiency accompanied by thrombocytopenia and eczema is commonly referred to as?
• Which of the following is NOT a hallmark of chronic HBV infection?
• Anti-RNA antibodies are typically found in individuals showing which type of immunofluorescent pattern?
• Which cells are incapable of secreting immunoglobulins?
• What does a uniform staining of the nucleus of interphase cells in an IFN-ANA test indicate?
• Which of the following is classified as an organ-specific autoimmune disease?
• Which immunoglobulin class is involved in immediate hypersensitivity reactions?
• Which of the following is NOT a typical characteristic of Tumor Associated Transplantation Antigens (TAAs)?
• What would be the expected outcome if a serum sample contained specific antibodies during an immunoassay?
• Soluble immune complexes are formed under what condition?
• Graft versus host disease is initiated by which party?
• Which immunoglobulin deficiency is commonly associated with severe respiratory infections?
• Which test is commonly used to evaluate a patient's cellular immune response?
• What determines if serological test results are diagnostic when drawn from a patient for a viral disease?
• In circumstances where rheumatoid factor is present, what type of false result may occur?
• What is the most likely reason for no cell lysis in the enzyme control tube during an ASO hemolytic essay?
• What are the primary mechanisms involved in the complement cascade?
• What type of cells produce immunoglobulins and are precursors to plasma cells?
• Rheumatoid factor consists of antibodies that bind to which part of the immunoglobulin?
• What function are T lymphocytes incapable of performing?
• In hyperviscosity syndrome, which immunoglobulin class is most likely involved in monoclonal disease?
• A patient who received mouse monoclonal antibody therapy might show a false positive in a sandwich assay due to which reason?
• Macrophage receptors facilitate which immune process?
• In a series of serial dilutions, if 10 µL of serum is added to the first tube containing 0.79 mL of diluent, what is the serum dilution of tube 7?
• A patient presenting with Raynaud phenomenon, myalgias, arthralgias, and difficulty in swallowing is likely to have which antibody?
• What is most useful for diagnosis during the convalescence phase of a viral infection?
• What determines the antibody allotype?
• Which condition is most commonly associated with patients who have homozygous C3 deficiency?
• Bence Jones proteins are categorized as what?
• Excess antigen in precipitation gel reactions will result in what?
• Which T cell malignancy is known to retain helper activity regarding immunoglobulin synthesis by B cells?
• What is cleaved as a result of activation of the classical complement pathway?
• What type of reaction does a heterophile antibody typically produce?
• Which component is associated only with the alternative pathway of complement activation?
• What is considered the best method to detect infections due to rubella, Epstein-Barr, and human immunodeficiency viruses?
• Which immunoglobulin class is known to produce anaphylactic reactions following blood transfusion?
• For longer storage periods, what temperature is preferable for serum samples?
• What type of antibodies are typically involved in autoimmune disorders?
• What antigen marker is most closely associated with the transmissibility of HBV infection?
• In hybridoma technology, which cell type is considered the desirable fusion partner for producing monoclonal antibodies?
• Which immunologic mechanism is usually involved in bronchial asthma?
• In an ELISA procedure, what is the purpose of washing the plate after incubating with the patient sample?
• Which statement accurately describes the significance of HLA matching in transplants?
• In an ELISA, what is typically measured to determine positive results?
• The IgM molecule is classified as which of the following?
• What is the primary action of natural killer cells when they encounter cells expressing MHC class I proteins?
• During T cell activation, which type of mediator is predominantly released?
• Which immunoglobulin is present in the highest concentration in normal human serum?
• What components make up the membrane attack complex of complement activation?
• Which antibodies would typically increase first in hepatitis A infection?
• Incompatibility with which procedure is an absolute contraindication to allotransplantation?
• Which symptoms are associated with the side effects of rheumatoid factor?
• Which proteins are coded by MHC class III genes?
• How are membrane-bound immunoglobulin molecules anchored?
• Where is the hinge region located within the immunoglobulin molecule?
• In the context of serological testing, what is the primary purpose of a positive test result?
• What type of serological test for syphilis relies on the detection of cardiolipin lecithin cholesterol antigen?
• Which complement component is responsible for releasing histamine and other mediators from basophils?
• What assay is best for confirming immune status to hepatitis B virus?
• What complement component is typically decreased in patients during the active stages of systemic lupus erythematosus?
• To calculate the absolute count of B lymphocytes from total WBC, which formula is used?
• Which of the following conditions is associated with the highest risk of autoimmune thyroid disease?
• Alpha-fetoprotein, a type of oncofetal antigen, is least likely to be found in which type of carcinoma?
• In flow cytometry, what analytical outcome is primarily evaluated using scatter plots?
• Which of the following is most likely to activate the alternative pathway of complement activation?
• During active systemic lupus erythematosus, what significant change is often observed in serum complement levels?
• Haptenic determinants will react with which of the following?
• What can cause false positive rheumatoid factor results in agglutination and nephelometric methods?
• The J-chain is associated with which immunoglobulin?
• The presence of HBsAg, anti-HBc and often HbeAg is characteristic of what phase of hepatitis?
• Which combination of symptoms best describes a possible case of systemic lupus erythematosus?
• What immunologic method is primarily utilized in flow cytometry?
• What follows the addition of the peroxidase linked drug conjugate in a classical ELISA test?
• In cases of chronic Hepatitis B, what serological marker is most useful for evaluating treatment efficacy?
• A cold agglutinin titer of 1:2000 in a patient with infectious mononucleosis indicates what important consideration?
• What is the strength of a visible reaction known as?
• The flocculation test for syphilis is used to detect the presence of which antibody?
• What enhances macrophage phagocytosis of bacteria?
• Rheumatoid factors target which specific part of the immunoglobulin molecule?
• The pattern of agglutination observed in an antibody titration shows a decrease then increase in reaction intensity. What does this likely indicate?
• Which test is most reliable for screening neonatal infections in absence of clinical signs?
• Which type of infectious agent is more likely to affect patients with Selective IgA deficiency?
• Which two immunoglobulin classes have a J chain associated with their structure?
• Antibodies directed at native DNA are most frequently associated with which pattern of fluorescence in the IFA-ANA test?
• What is a common feature of both Chronic Lymphocytic Leukemia and Hairy Cell Leukemia?
• What is a recognized theory of the origin of autoimmunity?
• What is the target microorganism detected in the direct fluorescent antibody test for primary syphilis?
• After a penicillin injection, a patient rapidly develops respiratory distress, vomiting, and hives. This reaction is primarily mediated by?
• In an indirect ELISA method designed to detect rubella virus antibody, which conjugate should be used?
• What condition is typically associated with a monoclonal spike of IgG, Bence Jones proteinuria, and bone pain?
• A heterophile antigen is best described as:
• What primarily determines antibody class and subclass in immunoglobulins?
• Macrophages are characterized by the presence of which type of surface receptors?
• Which components of the complement system are most likely to coat a cell?
• A marked decrease in CD4 lymphocytes is often associated with which condition?
• What type of immunity is demonstrated by the DPT vaccination?
• Anti-glomerular basement membrane antibody is most often associated with which condition?
• Which type of cells is responsible for nonspecific killing of tumor cells?
• What is associated with the escape phase of immunoediting?
• What type of procedure is it when the antigen is a natural component of the infectious entity?
• What immunofluorescent pattern is most commonly associated with anti-extractable nuclear antigens?
• What is the significance of using a serial dilution in lab assays?
• Which test would likely have been requested earlier for a patient showing signs of syphilis?
• What is the visible serological reaction between soluble antigen and its specific antibody called?
• Bone marrow transplant donors in the recipients must be matched for which antigen system?
• In the IFN-ANA test, what does staining of the chromosomes in mitotic cells suggest?
• Which function is mediated by T lymphocytes possessing the CT8 surface marker?
• What type of testing is performed when using direct immunoassay techniques?
• What characterizes chronic carriers of HBV?
• In the context of autoantibodies, what does "anti-Sm" refer to?
• Which type of autoimmune disease primarily affects the thyroid gland?
• Which lymphocytes are primarily responsible for humoral immunity?
• Why is cholesterol added to the antigen in the flocculation test for syphilis?
• What follow-up test is recommended after equivocal Lyme antibody results?
• What is the outcome of C3b after being cleaved by C3 inactivator?
• Which of the following is true about the equilibrium phase of immunoediting?
• Which test can be modified to selectively detect specific IgM antibodies?
• What is the main characteristic of hereditary angioedema?
• Immunoglobulin idiotypic diversity is best explained by which theory?
• In the context of immunoassays, what does the term "specificity" refer to?