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52 Cards in this Set
- Front
- Back
DNA viruses
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Hepadna, herpes, adeno, parvo, papova, pox
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RNA viruses
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picorna, calici, reo, flavi, toga, retro, corona, orthomyxo, paramyxo, rhabdo, filo, arena, bunya, delta
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Hepanda
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enveloped; DS- partial circular
HBV; has a reverse transcriptase |
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Herpes
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HSV, VZV, EBV, CMV, HHV 6 (roseola), HHV 8- Kaposis
enveloped, linear DS |
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Adeno
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NO envelope; DS linear
febrile pharngitis, pneumonia, conjunctivitis, diarrhea |
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Parvo
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No envelope; SS linear
B19- aplastic crisis in sickle cell disease, "slapped cheek" rash, erythemia infectiosum, hydrops fetalis |
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Papova
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No envelope; DS circular; HPV warts, CIN, cervical cancer
JC- progressive multifocal leukoencephalopathy (PML) in HIV Cancer: 16 and 18 kiolocytes- cytoplasmic clearing |
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Pox
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Envelope; DS- linear
small pox, cow pox from infected cow udders molluscum contagiosum- raised lesion with central divot, flesh colored |
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Picorna
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No envelope, SS linear, icosahedral
Polio- ant horn of SC Echo- aspetic meningitis, mild, from pools Rhino- common cold Coxsackie- aseptic meningitis, HFM, febrile pharnygitis, myocarditis HAV |
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calici
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no envelope, SS linear, icosahedral
HEV and Norwalk-cruiseship GE |
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Reo
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no envelope, DS linear, segmented, icosahedral- Reo and Rota- wintery watery diarrhea
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Flavi
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envelope, SS linear, icosahedral
HCV Yellow fever WNV- from birds, muscle weakness, paralysis, anterior horn SC SLE |
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Toga
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envelope, SS linear, icosahedral
rubella equine encephalitis |
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Retro
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envelope, SS linear, icosahedral
have reverse transcriptase, HIV-AIDS, HTLV-T cell leukemia |
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Corona
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envelope, SS linear, helical
Common cold and SARS- fever, cough, suspected exposure, positive lab assay or pneumo/ARDS w/o known cause |
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Orthomyxo
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enveloped, SS linear segmented, helical
Influenza |
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Paramyxo
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enveloped, SS linear, helical
Parainfluenza- croup- barking seal cough, inspiratory wheezes, steeple sign RSV- brassy cough, looks like pneumonia Measles Mumps |
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Rhabdo
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enveloped, SS linear, helical
Rabies |
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Filo
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enveloped, SS linear, helical, hemorrhagic fever
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arena
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enveloped, SS linear, helical- LCV, meningitis
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Bunya
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enveloped, SS linear, helical
Hanta- hemorrhagic fever, pneumonia, rodent resevoir |
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Delta
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enveloped, SS circular, helical, HDV
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negative stranded
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arena, bunya, paramyxo, orthomyxo, filo, rhabdo
must transcribe negative to positive |
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Killed vaccines
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rabies, influenza, salk, HAV
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Egg based vaccines
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Flu, MMR, yellow fever
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Reassortment
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when viruses with segmented genomes exchange segments; worldwide pandemics
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Recombination
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exchange of genes between 2 chromosomes by crossing over within regions of significant base homology
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complementation
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when 1 of 2 viruses that infect the cell has a mutation that results in a nonfunctional protein; the nonmutated virus complements the mutated one by making a functional protein that serves both viruses
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Amantidine mechanism
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blocks viral penetration and uncoating; release of dopamine from intact nerve terminals (parkinsons tx)
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uses and toxicity of amatidine
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Influ A, Parkinsons
causes ataxia, dizziness, slurred speech |
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zanamivir, oseltamivir
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DOC avian flu
inhibit influenza neuraminidase used for influ A and B |
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ribavarin
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inhibits synthesis of guanine nucleotides by competitively inhibiting IMP dehydrogenase
used for hep C causes hemolytic anemia, severe teratogen |
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Acyclovir, valacylovir, famcyclovir
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preferentially inhibits viral DNA pol when phosphorylated by viral thymidine kinase
used in HSV, VZV, EBV, mucocutaneous and genital herpes lesions tox: delirium, tremor, nephrotox |
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Gancyclovir
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phosphorylated by viral kinase; preferentially inhibits CMV DNA pol
tox: leukopenia, neutropenia, TCP, renal tox |
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Foscarnet
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viral DNA pol inhibitor that binds to the pyrophosphate binding site of the enzyme; does not require activation by viral kinase
used in CMV or HSV |
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Protease inhibitors
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saquinavir, ritonavir, indinavir, nelfinavir, amprenavir
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PI mechanism, tox
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inhibit assembly of new virus by blocking protease in progeny virions
GI intolerance, hyperglycemia, lipodystrophy, TCP, inhibit P450 |
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NRTI
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zidovudine (AZT), didanosine (ddI), zalcitabine (ddC), stavudine (d4T), lamivudine (3TC), abacavir
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NNRTI
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nevirapine, efavirenz, delavirdine
(direct and noncomp) |
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toxicity of RTI
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bone marrow suppression, peripheral neuropathy, lactic acidosis, rash, megaloblastic anemia (AZT)
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start HIV therapy
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when CD4 < 200
CD4 < 350 + sxs CD4 > 350, viral load > 100K or if CD4 rapidly decreasing |
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occupational exposure
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zidovudine and lamivudine
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HAART
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zidovudine, lamivudine, effavirenz/PI
2 PPIs + 1 other |
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pregnancy
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zidovudine
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IFNa
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chronic hep B and C, Kaposis
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IFN beta
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MS
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IFN gamma
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NADPH oxidase deficiency
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SE lactic acidosis
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NRTIs (zido, didan, stavu)
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SE GI intolerance
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protease inhibitors, zido
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SE pancreatitis
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didanosine, zalcitabine, stavudine, ritonavir
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SE peripheral neuropathy
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didano, zalcita, stavu
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SE bone marrow suppression
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zido
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