<unk> es are a genus of (+)ssRNA viruses associated with several human and mammalian diseases. Serologic studies have distinguished 66 human<unk>  serotypes on the basis of antibody neutralization tests. Additional antigenic variants have been defined within several of the serotypes on the basis of reduced or nonreciprocal cross-neutralization between variant strains. On the basis of their pathogenesis in humans and animals, the<unk> es were originally classified into four groups, polioviruses, Coxsackie A viruses (CA), Coxsackie B viruses (CB), and echoviruses, but it was quickly realized that there were significant overlaps in the biological properties of viruses in the different groups.<unk> es isolated more recently are named with a system of consecutive numbers:<unk> 68,<unk> 69,<unk> 70, and<unk> 71, etc.<unk> es affect millions of people worldwide each year, and are often found in the respiratory secretions (e.g., saliva, sputum, or nasal mucus) and stool of an infected person. Historically, poliomyelitis was the most significant disease caused by an<unk> , Poliovirus. There are 62 non-polio<unk> es that can cause disease in humans: 23 Coxsackie A viruses, 6 Coxsackie B viruses, 28 echoviruses, and 5 other<unk> es. Poliovirus, as well as coxsackie and echovirus are spread through the fecal-oral route. Infection can result in a wide variety of symptoms ranging from mild respiratory illness (common cold), hand, foot and mouth disease, acute hemorrhagic conjunctivitis, aseptic meningitis, myocarditis, severe neonatal sepsis-like disease, and acute flaccid paralysis.
Enterovirus
Arbovirus
Coronavirus
Echovirus
Erbovirus
Hantavirus
Varicosavirus
Pomovirus