RNA viruses Flashcards Preview

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Flashcards in RNA viruses Deck (15):
1

Reoviruses

Envelope: No
RNA structure: DS linear
10-12 segments
Capsid symmetry: Icosahedral (double)
Medical importance: Coltivirus--Colorado tick fever
Rotavirus-#1 cause of fatal diarrhea in children

2

Picornaviruses

Envelope: No
RNA structure: SS+ linear
Capsid symmetry: Icosahedral
Medical importance:
Poliovirus - polio-Salk/Sabin vaccines - IPV/OPV
Echovirus - aseptic meningitis
Rhinovirus - "common cold"
Coxsackievirus - aseptic meningitis; herpangina (mouth blisters, fever); hand, foot and mouth disease; myocraditis
HAV - acute viral hepatitis
PERCH

3

Hepevirus

Envelope: No
RNA structure: SS+ linear
Capsid symmetry: Icosahedral
Medical importance: HEV

4

Caliciviruses

Envelope: No
RNA structure: SS+ linear
Capsid symmetry: Icosahedral
Medical importance:
Norovirus - viral gastroenteritis

5

Flaviviruses

Envelope: Yes
RNA structure: SS+ linear
Capsid symmetry: Icosahedral
Medical importance:
HCV
Yellow fever
Dengue
St. Louis encephalitis
West Nile virus

6

Togaviruses

Envelope: Yes
RNA structure: SS+ linear
Capsid symmetry: Icosahedral
Medical importance:
Rubella
Eastern equine encephalitis
Western equine encephalitis

7

Retroviruses

Envelope: Yes
RNA structure: SS+ linear
Capsid symmetry: Icosahedral (HTLV),
complex and conical (HIV)
Medical importance:
Have reverse transcriptase
HTLV - T-cell leukemia
HIV - AIDS

8

Coronaviruses

Envelope: Yes
RNA structure: SS+ linear
Capsid symmetry: Helical
Medical importance:
Coronavirus-"common cold" and SARS

9

Orthomyxoviruses

Envelope: Yes
RNA structure: SS- linear
8 segments
Capsid symmetry: Helical
Medical importance: Influenza virus

10

Paramyxoviruses

Envelope: Yes
RNA structure: SS- linear
Nonsegmented
Capsid symmetry: Helical
Medical importance:
PaRaMyxovirus:
Parainfluenza - croup
RSV - bronchiolitis in babies; Rx - ribavirin
Measles, Mumps

11

Rhabdoviruses

Envelope: Yes
RNA structure: SS- linear
Capsid symmetry: Helical
Medical importance: Rabies

12

Filoviruses

Envelope: Yes
RNA structure: SS- linear
Capsid symmetry: Helical
Medical importance: Ebola/Marburg hemorrhagic fever - often fatal!

13

Arenviruses

Envelope: Yes
RNA structure: SS- linear 2 segments
Capsid symmetry: Helical
Medical importance:
LCMV - lymphocytic choriomeningitis virus
Lassa fever encephalitis - spread by mice

14

Bunyavirus

Envelope: Yes
RNA structure: SS- linear 3 segments
Capsid symmetry: Helical
Medical importance: California encephalitis
Sandfly/Rift Valley fevers
Crimena-Congo hemorrhagic fever
Hantavirus - hemorrhagic fever, pneumonia

15

Delta virus

Envelope: Yes
RNA structure: SS- linear
Capsid symmetry: Uncertain
Medical importance: HDV is a "defective" virus that requires HBV co-infection

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