Thin section of an enveloped DNA virus (herpesvirus).

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Thin section of an enveloped DNA virus (herpesvirus). Thin section of an enveloped DNA virus (herpesvirus). Nucleocapsids are produced in the nucleus (small arrowheads); they can bud out through the nuclear membrane (large arrowhead) to obtain their outer covering, or sometimes they make their way into the cytoplasm naked and then bud into cytoplasmic vesicles or out into extracellular space through the plasma membrane (arrow). Bar, 100 nm. Magnification, ×20,000. (Courtesy of Alyne Harrison, CDC.)‏ Cynthia S. Goldsmith, and Sara E. Miller Clin. Microbiol. Rev. 2009; doi:10.1128/CMR.00027-09