Viral Patho/Pharmaco Flashcards
Obligate Intracellular Parasite does what?
Introduces nucleic acids into the cell in a capsid with some tegument (loose proteins)
Glycopeptides determine what?
Host range
Virus’ are not?
Cells and have no reproductive system
How do they survive?
Host processes
Disrupt cell function
Impair synthesis and predispose to infection
Lyse out or become dormant
DNA Viruses are?
Small pox Chickenpox Herpes Hep B CMV HPV
RNA Non-retro viruses are?
Rabies Polio Influenza Colds Measles Mump Rubella Hep A/C
RNA Retroviral Viruses are?
HIV and HTLV (leukemia)
Absorption/attachment of virus
Determines host range
Entry
Penetration into the host cell
Fusion with cell membrane
Uncoating
Release of the viral nucleic acids
Replication
Prophage (lie dormant)
Lysogeny (replicate to lyse)
Assembly
New replicated viral prepare for inclusion
New glycoproteins and structures are staged and then assembled
Release
Lysis as a naked capsid virus or bud as an enveloped virus
Acyclovir and Valacyclovir MOA
Acts like guanine and causes termination
Needs thymidine kinase to add first phosphate
Valganciclovir is very good against?
CMV
Famciclovir is special how?
GI absorption
High Dose and IV -Cyclovirs have what ADRs
Myelosuppresion
Nephrotoxicity
Neuro
Cidofovir MOA
Acts like cytosine and causes termination
Doesn’t need thymidine kinase
Cidofovir activty
HSV, VZV, CMV
Cidofovir ADR
Nephro
Bone Marrow Suppresion
Foscarnet MOA
Bind DNA pol at the pyrophosphate binding site and inhibits elongation
Foscarnet is given?
IV only
Foscarnet ADRs?
Nephro
Neuro
Hypocalcemia
Fomivirsen MOA
Gene silencing - inhibits replication