HIV

• Q1.The receptor through which M-tropic HIV strains bind

  • ACCR5
  • BCXCR4
  • CCXCR5
  • DAny of the above
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• Q2.HIV window period indicates :

  • Atime period between infection and onset of first symptoms
  • Btime period between infection and detection antibodies
  • Ctime period between infection and minimum multiplication of organism
  • Dtime period between infection and maximum multiplication
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• Q3.What virus is noted for such a high incidence of antigenic drift that more than one antigenic variant can be isolated from infected individuals?

  • AAdenovirus
  • BHerpesvirus
  • CHIV
  • DInfluenza Virus
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• Q4.All of the following methods are used for the diagnosis of HIV infection in a 2-month-old child, except

  • ADNA-PCR
  • BHIV ELISA
  • CViral culture
  • DP24 antigen assay
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• Q5.The virus HIV is produced and propagated in:

  • ADendritic cells of the lymphnode germinal epithelium
  • BCirculating T4 lymphocytes
  • CB- lymphocytes
  • DEpithelial cells of the sex organs
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• Q6.First time causative agent of AIDS was discovered in:

  • A1976
  • B1983
  • C1994
  • D1969
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• Q7.One day after a casual sexual encounter with a bisexual man recently diagnosed as antibody-positive for human immunodeficiency virus (HIV), a patient is concerned about whether she may have become infected. A negative antibody titer is obtained. To test for seroconversion, when is the earliest you should reschedule repeat antibody testing after the sexual encounter?

  • A1 to 2 weeks
  • B3 to 4 weeks
  • C6 to 12 weeks
  • D12 to 15 weeks
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• Q8.One day after a casual sexual encounter with a bisexual man recently diagnosed as antibody-positive for HIV, a patient is concerned about whether she may have become infected. A negative antibody titer is obtained. To test for seroconversion, when is the earliest you should reschedule repeat antibody testing after this sexual encounter?

  • A1 to 2 weeks
  • B16 to 20 weeks
  • C6 to 12 weeks
  • D12 to 15 weeks
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• Q9.Gag gene encodes for -

  • AReverse transcriptase
  • BCore antigen
  • CEnvelope
  • DGene activation
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• Q10.HIV infection is known to be transmitted during all of the following EXCEPT

  • Abreast feeding
  • Bchild birth
  • Cheterosexual intercourse
  • Dkissing
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Answer key

Q1: A. CCR5; Q2: B. time period between infection and detection antibodies; Q3: C. HIV; Q4: B. HIV ELISA; Q5: B. Circulating T4 lymphocytes; Q6: B. 1983; Q7: C. 6 to 12 weeks; Q8: C. 6 to 12 weeks; Q9: B. Core antigen; Q10: D. kissing.

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• DNA Viruses
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• Protozoa: Amoebae, Ciliates and Flagellates
• Protozoa: Sporozoa
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