MCQs Mock Test for Lab Technicians and Technologists: Chapter 38

Regarding the primary and secondary antibody responses, which one of the following statements is MOST accurate?

Your patient is a child who has no detectable T or B cells. This immunodeficiency is most probably the result of a defect in

Inactivation of a toxin by an antibody is termed:

An antibody directed against the idiotypic determinants of a human IgG antibody would react with:

The MOST important protective function of the antibody stimulated by tetanus immunization is:

The mother of a 4-year-old child notes that her child is sleeping poorly and scratching his anal area. You suspect the child may have pinworms. Which one of the following is the BEST method to make that diagnosis?

In agglutination reactions, the antigen is a ……………… in precipitation reactions, the antigen is a ……………..

Each of the following parasites passes through the lung during human infection EXCEPT:

Wheal and flare is which type of hypersensitivity reaction?

Each of the following statements concerning Schistosoma haematobium is correct EXCEPT:

Mature cyst of Entamoeba histolytica is:

Each of the following statements concerning hydatid cyst disease is correct EXCEPT:

Each of the following statements concerning haptens is correct EXCEPT:

A 35-year-old captain in the army reserves has been plagued by a painful, erosive lesion near his ear lobe since his return from Operation Desert Storm several years ago. He denies exposure to the toxic by-products of burning oil fields. Punch biopsy of the leading edge of the erosion reveals macrophages distended with oval amastigotes. How was this infection acquired?

A 13-year-old boy from India was brought to the emergency room with a prolapsed rectum. Examination of the rectum reveals small worms that resemble whips attached to the mucosa. A stool sample reveals eggs that are barrel shaped, with bipolar plugs. Which of the following is the most likely cause?

Mosquitoes is/are the vector in the following disorder(s)

Laboratory diagnosis of a patient with a suspected liver abscess due to Entamoeba histolytica should include:

Bone marrow transplantation in immunocompromised patients presents which major problem?

Which category of hypersensitivity BEST describes hemolytic disease of the newborn caused by Rh incompatibility ?

Each of the following statements concerning Ascaris lumbricoides is correct EXCEPT:

A 4-year-old boy presents to his pediatrician with intense perianal itching. His mother explains that the child has also been extremely irritable during the day and has not been sleeping well at night. Eggs with a flattened side were identified by the laboratory technician from a piece of scotch tape brought in by the parent. Infection with which of the following organisms is most likely?

Mediated through allergen specific IgE A patient with severe asthma gets no relief from antihistamines. The symptoms are MOST likely to be caused by:

Each of the following statements concerning kala-azar is correct EXCEPT:

Type I hypersensitivity includes all of the following except:

DNA vaccine contain………….. DNA that stimulates cells to make………….antigens.

Each of the following statements concerning hookworm infection is correct EXCEPT:

An HIV-positive patient with a CD4+ count of 47 presents with diarrhea. Acidfast structures are found in the stool. From this finding, which of the following is true?

Isotypes of Antibodies refer to variations in the:

Each of the following statements concerning Toxoplasma gondii is correct EXCEPT:

Each of the following parasites is transmitted by eating inadequately cooked fish or seafood EXCEPT:

An Rh-negative woman married to a heterozygous Rh-positive man has three children. The probability that all three of their children are Rh-positive is:

A 24-year-old primiparous woman in her eighth month of gestation develops a positive IgM titer to Toxoplasma gondii for the first time. She should be advised by her physician that

Each of the following parasites is transmitted by mosquitoes EXCEPT:

Type I hypersensitivity is mediated by which of the following immunoglobulins?

Children at day care centers in the United States have a high rate of infection with which one of the following?

Infective stage of Entamoeba histolytica is:

A 40-year-old woman has a history of chronic inflammation of the small joints of the hands bilaterally. You suspect rheumatoid arthritis. Which one of the following statements is the MOST accurate regarding the pathogenesis of this disease?

A patient with a central nervous system disorder is maintained on the drug methyldopa. Hemolytic anemia develops, which resolves shortly after the drug is withdrawn. This is MOST probably an example of:

An epitope is

Each of the following statements concerning Diphyllobothrium latum is correct EXCEPT:

“Isotype switching” of immunoglobulin classes by B cells involves:

The principal difference between cytotoxic (type II) and immune complex (type III) hypersensitivity is:

Of the following choices, the MOST important function of antibody in host defenses against bacteria is:

Each of the following statements concerning Trichomonas vaginalis is correct EXCEPT:

Which of the following antibodies have a positive effect on babies through breast feeding?

The main anatomic location of Schistosoma mansoni adult worms is:

Which one of the following statements concerning immunoglobulin allotypes is CORRECT?

At a school nurse’s request, a clinic in rural South Carolina sees a 9- year-old girl who appears listless and inattentive, although hearing and visual testing has been within normal limits. The physician finds the child thin, with the “potbelly” of malnutrition, and orders a fecal exam and CBC. The CBC reveals a microcytic, hypochrornic anemia, and the fecal exam detects brown, oval nematode eggs approximately 65 microns in size, too numerous to count. What was the most likely means by which this child was infected?

A child stung by a bee experiences respiratory distress within minutes and lapses into unconsciousness. This reaction is probably mediated by:

Each of the following statements concerning sleeping sickness is correct EXCEPT: