Viruses of childhood Flashcards
atypical measles
intense rash, vesicles, petechiae, prurpura or urticaria
erythema infectiosum =
parvovirus B19
RotaTeq vaccine
life attenuate vaccine, human bovine reassortant,
oral, 3xbetween 2, 4 6 months
parvovirus B19 complciations
anemia due to reduced cell number and hemoglobin
aplastic crisis due to RBC loss
transmission to fetus > still brith, edam (detal hydrops) anemia, CHF, no abnormalities
subacute sclerosing panencephalitis
measles
CNS perosnality, behavior memory changes
myoclonc jerks, spasticity
blindness
newly discovered parvovirus resposnible for repiratory and GI infections
bocavirus
parvovirus internalized via
coated pits
parvovirus B19 clinical
eryhtma infectiosum (fifths disease)
red cheeks, maculopapu;ar rash
circulating immune complexes > rash, athralgia, arthritis, but do not fix complement
congenital rubella syndrome
cataracts
heart defects
deafness
growth + mental retardation
FTT
mortality
microencephaly
key to meales, mumps, rubella vaccination effectiveness
single antigenic type (infection prevents reinfection)
systemic replication prior to infecting target ogan - antibodies can limit or block at this stage
measles pathogenesis
respiration
lymphatic spread > viremia
conjunctivae, respiratory, urinary tract, vessels, lymph, cns
Virus infected endothelial cells plus immune Tcells
Rash
Recovery + immunity
post measeles encephalitis
acute onset of headache, vonfuion, voimitiung, coma after rash dissipates
major enterovirus groups resonsible for paralytic disease, encephalitis meningitis, RTI, undifferenciated fever
Poliovirus,
coxsackie A and B virus
Echnoviruses
parvovirus infection location, recepotr
actively replicated RBC progenitors in marrow (viremia)
receptor is blood gorup P antigen (globoside)
antigen group of Rota virus most common cause of human disease
group A (VP6 subgroup)