pikornaviiruste rühma kuuluv kestata üheahelaline RNA‑viirus, mis talub üsna hästi mao happelist keskkonda, villilist löövet, ägedat kõhuvalu ja kõhulahtisust põhjustav viirus, any of a group of RNA viruses (including those causing polio and hepatitis A) which typically occur in the gastrointestinal tract, sometimes spreading to the central nervous system or other parts of t, any of a genus (Enterovirus) of picornaviruses that occur especially in the gastrointestinal tract but may infect other tissues (such as nerve and muscle) and that include the poliovirus, Coxsackievir