Vero cell culture infected with Brazil strain <i>T. cruzi</i> showing asynchronous amastigote nests inside cell.

<p>(1) uninfected cell; (2) very early infection, (3) more advanced and (4) a cell in which amastigotes have completely transformed to trypomastigotes. Note that other infected cells are present in this view as well. Photo was taken at 400× magnification.