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Anti-infective
Introduction to Anti-infectives
56
Pharmacology
Undergraduate 2
03/24/2011

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Term
function of anti-infective
Definition
suppress growth of competing microrganisms
Term
what did they use for infection in ancient china?
Definition
moldy soybean curd
Term
use of synthetic, semi-synthetic, or natural products to inhibit the specific organism causing a disease
Definition
chemotherapy
Term
who first observed penicillin
Definition
alexander fleming (1928)
Term
what determines enzyme metabolism of a drug?
Definition
pharmacokinetics/ enzyme structure
Term
ideal pharmacodynamic response
Definition
no response
Term
toxicity of antibacterials occurs from_______
Definition
inappropriate doses or drug interactions
Term
resistance mechanisms
Definition
-mutations
-adaptations
-gene transfer
Term
-blocking one pathway that is essential for growth or survival of organism
-blocking action vital to both the host and microbe with the effect mainly exerted on microbe
Definition
selective toxicity
Term
interfere with the growth and replication of the organism without killing it
Definition
static
Term
antiinfective-mediated death of the organism (lethal)
Definition
cidal
Term
differece btw a fungal and plant cell wall:
Definition
plants have cellulose, fungi have chitin
Term
unicellular organisms
opportunistic pathogens
Definition
yeasts
Term
example of yeast
Definition
cryptococcosis
candidiasis
Term
grow in mulitcellular fillaments called hyphae
Definition
molds
Term
common mold responsible for lung disease
Definition
aspergillus
Term
adverse effects of fungi
Definition
1. allergic disease
2. mushroom poisoning (mycetism)
3. mycotoxins
4 mycoses
Term
one of the most carcinogenic toxins known to man
Definition
A. flavus "aflatoxin"
Term
this mycotoxin is a biological weapon
Definition
Fusarium
Term
2 classifications of deep mycoses
Definition
1. dimorphic
2. opportunistic
Term
why do only a few fungi cause diseases in healthy ppl?
Definition
b/c fungi usually prefer to live off of dead matter. infectious forms usually morph into a different form
Term
membrane disrubting agents
Definition
amphotericin b
nystatin
Term
ergosterol synthesis inhibitors
Definition
azoles
allylamines
morpholine
Term
nucleic acid inhibitor
Definition
flcytosine
Term
what is the main component of the fungal cell wall
Definition
ergosterol
Term
anti-mitotic (spindle disruption)
Definition
griseofluvin
Term
glucan synthesis inhibitors
Definition
Echinocandinds
-caspofungin
-anidulafungin
-micafungin
Term
these bind sterols and disrupt the osmotic integrity of cell membrane- fungicidal
Definition
polyene
Term
this polyene is used to treat disseminated candida, fungal meningitis- nephrotoxic
Definition
amphotericicn B
Term
Nephrotoxicity of AMB is increased by
Definition
cyclosporine and aminoglycosides
Term
this polyene has poor oral absorption, does not penentrate into the CSF, vitreous humor, amnionitc fluid, half life 15 days
Definition
Amphotericin B
Term
two broad classes of Azoles
Definition
1. imidazole
2. triazoles
Term
mainstay of antifungal therapy today b/c they less interference with human steroid synthesis
Definition
triazoles
Term
inhibits ianosterol demethylase and impairs the synthesis of ergosterol- FUNGISTATIC
Definition
Azole MOA
Term
complications of azoles
Definition
hepatotoxicity, htn, visual impairment
Term
drug interactions of azoles are ______ in nature
Definition
pharmakokinetic
Term
increasing pH does what to absorption of azole
Definition
inreases
Term
azoles are metabolized
Definition
cyp 450 system
Term
azole metabolized in the lever
substrate and inhibitor of CYP3A4
does not appear in CSF or urine
Definition
Itraconazole
Term
Azole absorbed from GI tract
diffuses into body fluids like CSF
Definition
Fluconazole
Term
azole with extensive distribution in tissues
Definition
voriconazole
Term
block ergosterol synthesis via inhibiton of squalene epoxidase, and enzyme needed for the creation of sterols- fungicidal
Definition
Allyamine MOA
Term
complications of allylamine
Definition
gastric distress and liver enzyme elevation
Term
block cell wall synthesis via the beta 1,3 glucan synthesis inhibition- fungicidal
Definition
echinocandins moa
Term
these are used for salvage therapy
Definition
echinocandins- caspofungin, micafungin, anidulafungin
Term
block fungal DNA and protein synthesis, fungal mitosis FUNGISTATIC
Definition
antimetabolite mechanism
Term
almost 50% or more of this antimetabolite will appear in the CSF and can treat menigitis
Definition
Flucytosine
Term
this antimetabolite has a half-lfe in plasma of about 24 hours
Definition
griseofulvin
Term
Membrane Disrupting Agents:
Definition
POLYENES
amphotericin B, nystatin, pimaricin (opthalamic)
Term
Ergosterol synthesis inhibitors
Definition
AZOLES
Allyamines
Term
terbinafine
butenafine
Definition
allyamines
Term
Ketoconazole is an _______
Definition
imidazole
Term
Glucan Synthase inhibitors
Definition
echinocandins
Term
caspofungin
anidulafungin
micafungin
Definition
echinocandins
Term
nucleic acid inhibitor
Definition
fluorinated pyrimidine
(flucytosine)
Term
what kind of drug is griseofulvin
Definition
anti-mitotic
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