4 1The property of a test to detect only a certain antibody or antigen and not t

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4 1The property of a test to detect only a certain antibody or antigen and not to react with any others is A. Specificity B. Sensitivity C. Agglutination 47. The VRDL test detects A. Syphilis B. Rickettsia C. Salmonella D. Candida E. None of the choices are cormect pitation Westerm blot test is confirmatory for HIV 48. The because A. It is more sensitive than the ELISA B. It has fewer false positives than the ELISA C. It tests for more HIV antibodies than ELISA D. It is easier to interpret than ELISA E. All of the choices are correct 42. A serum titer involves A. Serially diluting a serum sample B. Determining the lowest dilution of serum that produces a visible reaction C. Determining the highest dilution of serum that produces a visible reaction D. The Westen blot method E. None of the choices are correct 43. A positive serological test for tuberculosis indicates that A. The patient has active tuberculosis B. The patient is an asymptomatic carrier of 49. Which test uses radioactive isotopes to label antibodies or antigens in order to detect minute amounts of corresponding antigen or antibody? A. The Quellung test B. Ouchterlony double diffusion C. Westerm blot D. Radioimmunoassay (RIA) E. C. The patient has been exposed to tuberculosis D. All of the choices are correct 44. Antibody testing requires A. A known antigen B. Both a known antigen and a known antibody C. Either a known antigen or a known antibody D. A known antibody 50. The reticuloendothelial system A. Is a support network of connective tissue fibers B. Originates in the cellular basal lamina C. Provides a passageway within and berween tissues and organs D. Is heavily populated with macrophages E. All of the choices are correct 51. Zoonotic pathogens A. Infect only humans 45. Soluble antigens are detected in this type of test. A. Agglutination B. Precipitation C. Sensitivity D. Cross-reactions E. Specificity B. Infect only mammals C. Have a broad host range D. Have a narrow host range E. None of the choices are correct 46. The Widal test is determinant for A. Syphilis B. Rickettsia C. Salmonella D. Candida E. All of the choices are correct 52. Which of the following flaid compartments is not a partner in immune function? A. Lymphatic system B. Blood stream C. Extracellular fluid D. Intracellular fluid E.

Explanation / Answer

41- property of a test only to detect antibody or antigen but not to react with it is specificity

42-serum titre involves the highest dilution of serum that produces visible reaction

43-positive serological test for tb indicates that the patient is exposed to tb

44-antibody testing require a known antigen

45-soluble antigens are detected in specificity

46-widal is determinant for candida

47-vdrl detects syphilis

48-

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