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Title: HIV-I
Description: Three of the earliest visible stage of Human immunodeficiency virus (HIV) replication. It occurs when viral proteins accumulate under the cell membrane in a process called budding (a). In the next stage a crescent shaped early bud has constricted, forming a membrane-encapsulated sphere, with the dense center called a viral nucleoid (b). As the constricting process continues, the virus pinches off and becomes free extracellular infectious virus (c). At this stage, the dark circular mucleoid condenses into a bar; this morphologic feature is used to discriminate HIV-I from HTLV-II and HTLV-III.
Topics/Categories: Cancer Types -- AIDS-Related
Cells or Tissue -- Abnormal Cells or Tissue
Type: B&W, Photo (JPEG format)
Source: Laboratory of Cell And Molecular Structure. National Cancer Institute
Creator: Dr. Matthew Gonda (Photographer)
AV Number: AV-8811-3347
Date Created: November 1988
Date Added: January 1, 2001
Reuse Restrictions: None - This image is in the public domain and can be freely reused. Please credit the source and, where possible, the creator listed above.