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parainfluenza 1 virus

(păr′ə-ĭn′flōō-ĕnzə)
n.
  1. A paramyxovirus that causes acute laryngotracheitis in children and, sometimes, in adults.hemadsorption virus type 2
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.