cryspovirus cryspovirus cryspovirus is a genus of viruses, in the family partitiviridae. protists serve as natural hosts. there is only one species in this genus: cryptosporidium parvum virus 1. cryspovirus virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: pisuviricota class: duplopiviricetes order: durnavirales family: partitiviridae genus: cryspovirus structure viruses in cryspovirus are non-enveloped, with icosahedral geometries, and t=1 symmetry. the diameter is around 30-35 nm. genomes are linear and segmented, around 2.1kb in length. the genome codes for 2 proteins. genusstructuresymmetrycapsidgenomic arrangementgenomic segmentation cryspovirusicosahedralt=1non-envelopedlinearsegmented life cycle viral replication is cytoplasmic. entry into the host cell is achieved by penetration into the host cell. replication follows the double-stranded rna virus replication model. double-stranded rna virus transcription is the method of transcription. protists serve as the natural host. genushost detailstissue tropismentry detailsrelease detailsreplication siteassembly sitetransmission cryspovirusprotistsnonecell division; sporogenesis; hyphal anastomosiscell division; sporogenesis; hyphal anastomosiscytoplasmcytoplasmcell division; sporogenesis; hyphal anastomosis