COMEDK 2007 MCQ Answer 102

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The correct answer is A

  • Absolute CD4 count: normal value would be 600-1200 in an adult.
  • CD4 percentage: normal value would be 30-60%
  • CD8 count: normal value would be 420-660 in an adult.
  • CD4:CD8 ratio: normal value would be 1.2-1.9.
  • CD4 count less than 200 is AIDS defining.
  • CD4 percentage of less than 20% indicates serious immunodeficiency and a value of less than 14% indicates AIDS.
Mycobacterium avium complex (MAC) consists of two species—M avium and Mycobacterium intracellulare. MAC causes disseminated infection in immunocompromised hosts, but only a minority of immunocompetent hosts develop MAC lung disease. Patients with AIDS and lymphomas usually develop disseminated MAC (DMAC) infection when their CD4 count falls to less than 50 cells/mL.


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