Enteroviruses
Enteroviruses
Genera of picornaviruses Enterovirus ◆Po|io Diseases of the human( and other alimentary tract ◆ Coxsackie a and B e.g.polio virus) ◆Echo ◆ Other enteroviruses Rhinovirus Disease of the nasopharyngeal region (e.g. common cold virus) Cardiovirus Murine encephalomyocarditis theiler's murine encephalomyelitis virus Aphthovirus Foot and mouth disease in cloven footed animals Hepatovirus Human hepatitis virus a Others Drosophila c virus, equine rhinoviruses, cricket paralysis virus
Genera of Picornaviruses Enterovirus Polio Coxsackie A and B Echo Other enteroviruses Diseases of the human (and other) alimentary tract (e.g. polio virus) Rhinovirus Disease of the nasopharyngeal region (e.g. common cold virus) Cardiovirus Murine encephalomyocarditis, Theiler's murine encephalomyelitis virus Aphthovirus Foot and mouth disease in cloven footed animals Hepatovirus Human hepatitis virus A Others Drosophila C virus, equine rhinoviruses, cricket paralysis virus
Categories of Enteroviruses Irus Serotypes Clinical Diseases Polioviruses 3 types Asymptomatic infection, viral meningitis, paralytic disease, poliomyelitis Coxsackie a 23 types(A1- Viral meningitis plus, rash, ARD, viruses A22.A24 myocarditis orchitis Coxsackie types(B1-B6) Viral meningitis, but no viruses orchitis Echoviruses 32 types Viral meningitis, with orchitis Other 4 types(68-71) Viral meningitis Enteroviruses
Categories of Enteroviruses Viral meningitis, rash,ARD Other 4 types(68-71) Enteroviruses Viral meningitis, with orchitis Echioviruses 32 types Viral meningitis, but no orchitis Coxsackie B 6 types (B1-B6) viruses Viral meningitis plus, rash, ARD, myocarditis, orchitis 23 types ( A1- A22, A24) Coxsackie A viruses Asymptomatic infection, viral meningitis, paraalytic disease, poliomyelitis Polioviruses 3 types Virus Serotypes Clinical Diseases
Properties of enteroviruses Property Enteroviruses Size(nm) 22-30 Capsid form Icosahedral Polypeptide VP1 VP2, VP3, Vp4 RNa type SS-PS RNA molecular weight 2000, 000-2600,000 Acid Stable*k Optimal temperature for growth(oC) 37 Density in caesium chloride(g/m) 1.34*
Properties of enteroviruses Property Enteroviruses Size (nm) Capsid form Polypeptide RNA type RNA molecular weight Acid Optimal temperature for growth(oC) Density in caesium chloride (g/m) 22-30 Icosahedral VP1, VP2, VP3, VP4 SS-PS 2000,000-2600,000 Stable* 37 1.34*
Transmission o Fecal -oral route: poor hygiene dirty diapers( especially in day- care settings) iNgestion via contaminated food and Water Contact with infected hands Inhalation of infectious aerosols
Transmission Fecal – oral route: poor hygiene, dirty diapers( especially in day-care settings) Ingestion via contaminated food and water Contact with infected hands Inhalation of infectious aerosols