Enteroviruses include Coxsackieviruses A1 to A21, A24, and B1 to 6 Echoviruses (enteric cytopathic human orphan viruses) 1 to 7, 9, 11 to 21, 24 to 27, and 29 to 33 Enteroviruses 68 to 71, 73 to 91, and 100 to 101 Polioviruses types 1 to 3 Enteroviruses are shed in respiratory secretions and stool and sometimes are present in the blood and cerebrospinal fluid of infected patients.