Fenger Flashcards
(51 cards)
What is usually not involved with parainfluenza virus and influenza virus
viremia
how long is incubation period for respiratory viruses
short
1-3 days
What if the virus causes a viremia, how long is incubation period
longer
weeks to weeks
What is the genomic make up for paramyxovirdiae
SS RNA
negative polarity
nonsegmeted
What structures does paramyxovirdiae have
Helical nucleocapsid
RNA dependent RNA polymerase
envelope
6 structural proteins
Name some glycoprotiens in paramyxovirdiae
Hemagglutinin (H) and Neruminadase (N)
What are the 3 primary genera for paramyxovirdiae
- paramyxovirus
- morbillivirus
- pneumovirus
How do the genera of paramyxovirdiae differe
differe in envelope glycoproteins
function of H glycoprotein
attachment of virus to receptors on cell surface
function of F glycoprotein
mediates fusion between viral envelope and outer cell membrane
what must happen to F glycoprotein in order for it to work
- proteolytically cleaved on viral envelope surface
F glycoprotein is similar to what
H glycoprotein of influenza virus
Where does Paramyxoviridae virus repliacate
cytoplasm
Paramyxovirus genus: type 1 symptoms
croup acute respiratory disease pneumonitis of newborns colds in adults coryza pharyngitis bronchitis children - bronchiolitis
Paramyxovirus genus: type 2 symptoms
coup
laryngotracheobronchitis
Paramyxovirus genus: type 3 and 4 symptoms
acute respiratory disease
bronchitis
pneumonia
Paramyxovirus genus has what disease
measles ( roseola)
what is under pneumovirus genus
RSV
what is the virulence factor for RSV
F glycoprotein
clinical symptoms of RSV
bronchiolitis and pneumonia in infants
what is the immune defense for RSV? what is not a good immune response
IgA
- maternal antibody IgG does not protect, may actually enhance severity
What do you give to babies at risk for RSV
- Palivizumab
- IV prophylaxis
which picornaviridae virus is acid stable and which ones are not
- enterovrises: acid stable
- rhinovirus is not
Enterovirus is commonly seen in who
young individuals
immunocompromised