Viruses that may cause adenoiditis include adenovirus, rhinovirus and paramyxovirus. The genomic structure of both viruses is that of a typical paramyxovirus. A viral infection caused by Paramyxovirus, a single-stranded RNA virus. The rule of six is a feature of some paramyxovirus genomes. Viruses linked to this can include; hepatitis C, cytomegalovirus, paramyxovirus, influenza A and adenovirus. The transmission of the paramyxovirus is by contact with the infected persons saliva. Caused by paramyxovirus that is transmitted by infected saliva and urine. Sosuga pararubulavirus is a species of Paramyxovirus which is transmissible to humans. However, certain serotypes of avian paramyxovirus do not show syncytium formation, only cell rounding. Studies have shown that the only paramyxovirus protein that activates NK is HN. Many paramyxovirus genomes follow the "rule of six". All "Paramyxovirus" virus particles are composed of a ribonucleoprotein core and a lipoprotein bilayer.