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(A) Cytopathic effects (CPEs) of rounded cells floating in the culture medium of MARC 145 cells infected with the pool of bat organs (heart and lungs) at three days after inoculation (original magnification × 100); (B) mock cells (original magnification ×100); (C) negative-staining electron microscopy showing the presence of a virion morphologically related to the Orthopoxvirus genus from the MARC 145 cell culture.
