English: Some Pandoravirus isolates. a Overproduction by an Acanthamoeba castellanii cell of Pandoravirus macleodensis virions from the environmental sample prior cell lysis. Environmental bacteria can be seen in the culture medium together with P. macleodensis virions. (scale bar is 10 µm). b TEM image of an ultrathin section of A. castellanii cell during the early phase of infection by P. neocaledonia. The ameba pseudopods are ready to engulf the surrounding virions. Ten minutes pi, virions have been engulfed and are in vacuoles (scale bar is 500 nm). c TEM image of an ultrathin section of A. castellanii cell during the assembly process of a P. salinus virion (scale bar is 500 nm). d TEM image of an ultrathin section of a nascent P. quercus virion. (scale bar is 500 nm). The structures of the mature particles from the different strains do not exhibit any noticeable difference.