Description: Note that poliovirus particles exhibit a basically featureless appearance in comparison to other small viruses such as astrovirus, Norwalk virus and other SRSVs, and typical (non-SRSV) calicivirus. Bar = 50 nanometers.

Method: Negative-stain Transmission Electron Microscopy on cell culture.

Photo Credit: F.P. Williams, U.S. EPA
Source: http://www.epa.gov/nerlcwww/polio.html

From en.wikipedia pt: poliomielite

	This image (or other media) is a work of an Environmental Protection Agency employee, taken or made as part of that person's official duties. As works of the U.S. federal government, all EPA images are in the public domain.
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