RNA + Viruses Flashcards
Pico virus sketchy scene
Peak orna animal nursery
Naked, icosahedral, +ssDNA, small
Pico
All + sense get replicated
In cytoplasm
Polio transmission
Resp and fecal/oral
Polio can cross
BBB
Infects axons of peripheral nerves and attacks anterior horn of spinal cord
Polio
Most kids with _____ are asymptomatic
Polio
What percent of polio is severe
1-2
Paralysis of diaphragm
Polio
What are all the enteroviruses
Polio
Coxsackie
Echovirus
Enterovirus
Enteroviruses are stable at _____ pH
Acidic
Enteroviruses replicate in
Oropharynx and GI tract
Enterovirus 71 causes
Hand foot and mouth
Poliomyelitis
Not really in USA
Enterovirus D68 causes
Acute flaccid myelitis
a resp illness comes before this
Encephalomyocarditis syndrome
Coxsackie B1 virus
Acid labile +
Rhino
Major trigger of asthma exacerbations and development of childhood asthma
Rhino
How does hep A transmit
Contaminated food
Fecal oral - daycares
IV drug use - #1 in USA
Jaundice, abnormal liver enzymes, fever, fatigue, nausea, abdominal discomfort
Hep A
Leading cause of viral gastroenteritis over all age groups
Norovirus - caliciviridae
Food preparer who is no longer symptomatic can still transmit virus
Norovirus
Low infectious dose, naked, fecal/oral transmission, common in daycares
Norovirus
Enveloped, iscosahedaral, arbovirus
Flaviviridae
If you have an antibody for yellow fever what could you also be protected agains
Dengue
Yellow
Zika
WN
Japanese encephalitis
St. Louis encephalitis
Powassan
What are the primary targets for flaviviridae
Cells of monocyte and macrophage lineage
Also dendritic cells
May infect endothelial cells of capillaries, has glycoproteins E1 and E2
Flavivir
Breakbone fever
Dengue
Worldwide, especially tropics
Dengue
Africa, South America
Yellow fever
Zika
Worldwide, especially tropics
Asia
Japanese encephalitis
Africa, Europe, Central Asia, North America
West nile
North America
St. Louis encephalitis
And
Powassan encephalitis
Sylvatic vs urban
S = wooded areas
primate —> mosquito—>human
U = human—>mosquito—>human
Gets midgut of ____ and moves to their ____ glands
Mosquito
Salivary
Arboviruses are picked up through the ___ but spread through ____
Blood
Saliva
With arbovirus, if virus is not cleared after primary viremia what can happen
Secondary viremia can produce enough virus to infect other organs
Mild affects of arbovirus primary viremia
Fever, chills, headaches, arthralgias
Effects of secondary arbovirus viremia
Hemorrhagic feve
Shock
Encephalitis
Assembly and release of HCV
HCV and VLDL form lipo viral particle
The viral antigens in LVP are shielded form immune response
Flushed skin, red conjunctiva, hepatomegaly
YFV
Yellow fever presentation
Infection—>remission—>intoxication—>death
Intoxication YFV
High fever
Coagulopathy and hemorrhaging
Hepatic is wack/jaundice
Renal failure
Shock
If you’re going to Africa or South America what should you get
YFV live vax
Retro-orbital pain
Dengue
Describe the antibody - dependent enhancement
Which disease
Dengue
1st infection: our body makes Ab to the infecting subtype
2nd infection: the 1Ab can cross react and bind to the 2nd infecting subtype. This enhances the uptake of the virus bc the virus has FC receptor
Why can Zika be scary
Congenital Zika = microencephaly
Guillain barre
Chronic inflammatory demyelinating polyneuropathy
Zika
What are the encephalitis viruses
West Nile, St. Louis, Powassan
Presentations of encephalitis viruses
Non-neuroinvasive
Neuroinvasive
Intermediate host for MERS
Camels
Largest RNA virus
Coronavirus
What binds to ACE2
Spike protein
Vax for sars cov2 induces antibodies to what
Spike protein
MERS transmission
Person to person
Doesn’t spread well
Which is more pathogenic SARSCOV or SARSCOV2
SARSCOV
Why is SARSCOV2 more widespread and severe
Bc its less virulent so its harder to detect, people spread it easier
Mutates quick
ARDS = ___
From what disease
Acute respiratory distress syndrome
Covid
When do viral titers peak in covid
4 days after onset
Describe Multisystem inflammatory syndrome what is it from
Cytokine storm like
heart, and kidney stuff
COVID
SARS COV2 is huge so it has its own
Proofreading system
Explain the variants of COV2
1: RNA polymerases make a lot of mistakes
2: recombination happens
3: this might change pathogenicity
4: which might make it easier to escape immune response
If we get OG variant our body makes Ab for OG. If we then get delta variant we do not already have the Ab for it
Things in α genus of toga
EEEV
WEEV
VEEV
Chikungunya
Toga altered pattern
+ RNA —> nonstructural proteins encoded in 5’ end of genomic RNA —-> - strand—-> subgenomic + mRNA from 3’ end——> structural proteins
α virus that’s north & South America and Caribbean
EEEV
α virus that’s North & South America
WEEV
α virus that’s north, south and Central America
VEEV
α virus that’s africa and Asia
Chikungunya
Which α virus causes severe encephalitis
VEEV
Severity of congenital rubella depends on
Fetal age at time of viremia
Major risk up until 20th week of pregnancy