What are the types of molluscum contagiosum viruses and which type causes most infections?

Updated: Aug 09, 2018
  • Author: Ashish C Bhatia, MD, FAAD, FACMS; Chief Editor: Dirk M Elston, MD  more...
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Through restrictive endonuclease analysis of the genomes of isolates, molluscum contagiosum virus types I-IV have been identified. In a study of 147 patients, molluscum contagiosum virus I caused 96.6% of infections, and molluscum contagiosum virus II caused 3.4%; however, no relationship was observed between virus type and lesional morphology or anatomical distribution. [1] Molluscum contagiosum viruses III and IV are rare. In patients with human immunodeficiency virus (HIV) infection, molluscum contagiosum virus II causes most infections (60%).

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