Exam 3 - Picorna-Caliciviruses Flashcards
Picornaviruses
General profile
ss + RNA
genome can be mRNA
Picornaviruses
3 relevant families
Entero- (polio/non-polio)
Hepato- (Hep A)
Rhino-
Picornaviruses
Entero
pathophys
- depends on host cell receptors
- replication > lysis
- viremia
Picornaviruses
Entero
epi/transmiss
- fecal-oral
- URI/inhalation
- summer/early fall
- infants/young
Picornaviruses
Nonpolio entero
3 categories
coxsackie-
ECHO-
entero-
Picornaviruses
Nonpolio entero
general sx
- mostly asx
- fever, lethargy, anorexia, vomit, diarrhea
Picornaviruses
Nonpolio entero
major viremia sx
-meningitis, enchephalitis
-myocarditis
pleurodynia, myositis
-perinatal infxn
-viral exanthema (herpangina - cox A)
-viral exanthama (handfootmouth - cox A16)
Picornaviruses
Nonpolio entero
Herpangina infxn
-Cox A
-fever, sore throat, vesicular enanthem
on soft palate, tonsils; ulcerates
-summer, children
Picornaviruses
Nonpolio entero
Hand-Foot-Mouth
- coxsackie A16
- children 3-10
- vesicular oral enanthem
- papulovesicular exanthem hands, feet
Picornaviruses
Nonpolio entero
Dx
- cell culture
- PCR
Picornaviruses
Nonpolio entero
Tx
self-limited
Picornaviruses
polio entero
epi/transmiss
- human res
- summer/fall
- vacc 1955
Picornaviruses
polio entero
sx
- mostly asymptomatic
- prim: fever, myalgia
- aseptic meningitis
- asymmetric flaccid paralysis (ant horn cell)
- cranial nerve paralysis (medulla/stem)
- resp paralysis > death
- if you live, myalgia sequelae
Caliciviruses
general profile
-ss + RNA
Caliciviruses
relevant spp
Norovirus