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318 Cards in this Set

  • Front
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Bugs with exotoxins

"Some Say Cobra Venom Entering Buttocks Could Cause Complete Blindness So Suck"
[S aureus/pyogenes SuperAgs]
[C. diptheria, V. Cholera, E. coli, B. pertusis----ADP ribosylation/A-B toxin]
[C.perfringens, C. tetani, C. botulinum, B.antrhax, Shigela, S. pyogenes----other toxins]

some toxins encoded by lysogenic phages.

ABCDE

-shigA-like toxin
-Botulinum toxin
-Cholera toxin
-Diphtheria toxin
-Erythrogenic toxin of -Streptococcus pyogenes

examples of Obligate anaerobes

Anearobes know their ABC's

-Actinomyces
-Bacterioides
-Clostridium

Catalase

what it does and why it's bad

Catalase degrades H2O2, an antimicrobial product of PMNs. H2O2 is a substrate for myeloperoxidase.

what makes coagulase

S. aureus makes coagulase,

whereas S. epidermidis
and S. saprophyticus do not.

bacterial cAMP inducers

cAMP

-Choerae
-Anthrax
-E.coli (imagine the heat (heat -labile) has caused the E to faint and as fallen over to make an M
-Pertussis

Zoonotic bacteria

Big Bad Bugs From Yer Pet

-Bartonella henselea
-Borrelia burgdorferi
-Brucella spp.
-Francisella tularensis
-Yersinia pestis
-Pasteurella multocida

Cat scratch fever aka

Bartonella henselae

Bartonella henselae

disease states

cat scratch fever
lymphadenopathy (swelling of the lymph nodes) and fever. and Peliosis Hepatis

Peliosis Hepatis
describe

is an uncommon vascular condition characterised by randomly distributed multiple blood-filled cavities throughout liver.

is an uncommon vascular condition characterised by randomly distributed multiple blood-filled cavities throughout liver.

Peliosis Hepatis

Peliosis Hepatis
causes

HIV
bartonella
malignancy
drugs

treatment of choice for most
rickettsial infections.

Tetracycline is the

Rocky Mountain spotted fever

where in the country

Endemic to East Coast (in spite of name).

Classic cause of atypical “walking” pneumonia

Mycoplasma pneumoniae

Leptospira interrogans

appearance and where found

Question marke shape spirochete bacteria in water contaminated with animal urine

Question marke shape spirochete bacteria in water contaminated with animal urine

Leptospira interrogans

Leptospira interrogans

clinical findings

fluelike with fever, headache, stomach pain and jaundace

also Weil's disease - severe form of jaundice and azotemia from liver and kidney dysfunction; fever, hemorrhage, and anemia

Weil's disease

aka icterohemorrhagic leptospirosis - severe form of jaundice and azotemia from liver and kidney dysfunction; fever, hemorrhage, and anemia

aka icterohemorrhagic leptospirosis - severe form of jaundice and azotemia from liver and kidney dysfunction; fever, hemorrhage, and anemia

Weil's disease

VDRL mech

VDRL detects nonspecific antibody that reacts with
beef cardiolipin. Used for diagnosis of syphilis, VDRL detects nonspecific antibody that reacts with
beef cardiolipin. Used for diagnosis of syphilis, but
many biologic false positives

detects nonspecific antibody that reacts with
beef cardiolipin. Used for diagnosis of syphilis, VDRL detects nonspecific antibody that reacts with
beef cardiolipin. Used for diagnosis of syphilis, but
many biologic false positives

VDRL

Systemic mycoses can mimic

TB
(granuloma formation).

“Tricky T’s”

-Typhoid fever=Salmonella typhi
-C.trachomatis=bacteria, STD.
-Trichomonas vaginalis=protozoan, STD.
-Trichinella spiralis=worm in pork.
-Trypanosoma=Chagas’ disease or African ss.
-Treponema=spirochete; causes syphilis (T. pallidum) or yaws (T. pertenue).

Rubella aka

(German measles)

German measles aka

Rubella

Hepatitis virus families

HEP A-picornavirus
HEP B-Hepaddnavirus
HEP C-flavivirus
HEP D-deltavirus
HEP E-Calicivirus/hepivirus

Rubella findings

fever, lympadenopathy, arthralgias. mild in children, but serious congenital disease)

congenital rubella findings

# malformations of the heart (especially patent ductus arteriosus), eyes or brain
# deafness
# eye defects (especially cataract and microphthalmia
# thrombocytopenic purpura (presents as a characteristic "blueberry muffin" rash)

# malformations of the heart (especially patent ductus arteriosus), eyes or brain
# deafness
# eye defects (especially cataract and microphthalmia
# thrombocytopenic purpura (presents as a characteristic "blueberry muffin" rash)

congenital rubella findings

"lots of spots"

rubella
rubeola
varicella
variola
vaccina

TORCHES infection findings

Toxoplasma

"clasic triad" of chorioretinitis, intracranial calcifications (ring enhanced lesions) and hydrocephalus

TORCHES infection findings

rubella

deafness, cataracts, PDA/pulmonary artery stenosis, retardation

TORCHES infection findings

CMV

petechial rash, intracranial calcifications, mental retardation, hepatosplenomgaly, jaundice. 90% are asymptomatic at birth

TORCHES infection findings

HIV

hepatosplenomgaly, neurologic problems, and frequent infections

TORCHES infection findings

HSV2

encephalitis, conjunctivitis, vesicular skin lesions

TORCHES infection findings

Syphilis

cutaneous lesions, hepatosplenomgaly, jaundice, saddle nose, saber shins, hutchinson teeth, CNVIII deafness,

hutchinson teeth

teeth that are smaller and more widely spaced than normal and which have notches on their biting surfaces. a sign of congenital syphilis

teeth that are smaller and more widely spaced than normal and which have notches on their biting surfaces.

hutchinson teeth-a sign of congenital syphilis

"clasic triad" of chorioretinitis, intracranial calcifications (ring enhanced lesions) and hydrocephalus

TORCHES infection findings

Toxoplasma

TORCHES infection findings

deafness, cataracts, PDA/pulmonary artery stenosis, retardation

rubella

TORCHES infection findings

petechial rash, intracranial calcifications, mental retardation, hepatosplenomgaly, jaundice. 90% are asymptomatic at birth

CMV

TORCHES infection findings

hepatosplenomgaly, neurologic problems, and frequent infections

HIV

TORCHES infection findings

encephalitis, conjunctivitis, vesicular skin lesions

HSV2

TORCHES infection findings

cutaneous lesions, hepatosplenomgaly, jaundice, saddle nose, saber shins, hutchinson teeth, CNVIII deafness,

hutchinson teeth

Top three causes of pneumonia in

Children (6 wks–18 yr)

-Viruses (RSV)
-Mycoplasma
-Chlamydia pneumoniae

Top three causes of pneumonia in

Adults (18–40 yr)

-Mycoplasma
-C. pneumoniae
-S. pneumoniae

Top three causes of pneumonia in

Adults (40–65 yr)

-S. pneumoniae
-H. influenzae
-Anaerobes

Top three causes of pneumonia in

Elderly >65

-S. pneumoniae
-Viruses
-Anaerobes

What age group has this pneumonia pattern

-Viruses (RSV)
-Mycoplasma
-Chlamydia pneumoniae

Children (6 wks–18 yr)

What age group has this pneumonia pattern

-Mycoplasma
-C. pneumoniae
-S. pneumoniae

Adults (18–40 yr)

What age group has this pneumonia pattern

-S. pneumoniae
-H. influenzae
-Anaerobes

Adults (40–65 yr)

What age group has this pneumonia pattern

-S. pneumoniae
-Viruses
-Anaerobes

Elderly >65

Top three causes of meningitis in

Newborn (0–6 mos)

-Group B streptococci
-E. coli
-Listeria

Top three causes of meningitis in

Children (6 mos–6 yrs)

-Streptococcus pneumoniae
-Neisseria meningitidis
-Haemophilus influenzae type B

Top three causes of meningitis in

6–60 yrs

-N. meningitidis
-Enteroviruses
- S. pneumoniae

Top three causes of meningitis in

60 yrs +

-S. pneumoniae
-Gram-negative rods
-Listeria

What age group gets this pattern of meningitis

-Group B streptococci
-E. coli
-Listeria

Newborn (0–6 mos)

What age group gets this pattern of meningitis

-Streptococcus pneumoniae
-Neisseria meningitidis
-Haemophilus influenzae type B

Children (6 mos–6 yrs)

What age group gets this pattern of meningitis

-N. meningitidis
-Enteroviruses
- S. pneumoniae

6–60 yrs

What age group gets this pattern of meningitis

-S. pneumoniae
-Gram-negative rods
-Listeria

60 yrs +

UTI bugs

SSEEK PP.

Serratia marcescens, staphylococcus saprophyticus
E. coli, Enterobacter cloacae
Klebsiella, Proteus mirabilis
Pseudomonas aeruginosa

Name the Gram + Rods
Anaerobes

Anaerobes
p Acne/
Clostridum/
fragilis (is gram but is in the mnemonic)/
a. Israeli /
mobiluncus muleris

Name the Gram + Rods
Aerobes

-Cornybacterium
-Listeria
-Bacillus
-Erysipelothrix

Name the Gram - Rods

Yersinia / Haemophilus / vibrio / Helicobacter / Pseudomonas / Campylobacter / Bordatella / Bacteriodes fragilis (the only anaerobe) / Brucella / Legionella / Pasturella / Klebsiella / Shigella / E. coli / Salmonella / Francesella

Name the Gram + Cocci

Strep
Staph
Enterococcus

Name the Gram - Cocci

Nissera

Name the Gram + Rods
Anaerobes

Anaerobes
p Acne/
Clostridum/
fragilis (is gram but is in the mnemonic)/
a. Israeli /
mobiluncus muleris

Name the Gram + Rods
Aerobes

-Cornybacterium
-Listeria
-Bacillus
-Erysipelothrix

Name the Gram - Rods

Yersinia / Haemophilus / vibrio / Helicobacter / Pseudomonas / Campylobacter / Bordatella / Bacteriodes fragilis (the only anaerobe) / Brucella / Legionella / Pasturella / Klebsiella / Shigella / E. coli / Salmonella / Francesella

Name the Gram + Cocci

Strep
Staph
Enterococcus

Name the Gram - Cocci

Nissera

Penicillin

Clinical use

-gram-positive cocci,
-gram-positive rods, -gram-negative cocci,
and
-spirochetes.

Penicillin

Toxicity

Hypersensitivity reactions, hemolytic anemia.

penicillinase-resistant penicillins

names

Methicillin, nafcillin, dicloxacillin

Methicillin, nafcillin, dicloxacillin (penicillinase-resistant penicillins)

Mechanism

Same as penicillin

Methicillin, nafcillin, dicloxacillin (penicillinase-resistant penicillins)

Clinical use

S. aureus (except MRSA; resistant because of altered penicillin-binding protein target site).

Methicillin, nafcillin, dicloxacillin (penicillinase-resistant penicillins)

Toxicity

Hypersensitivity reactions; methicillin––interstitial nephritis.

aminopenicillins
names

Ampicillin, amoxicillin

Ampicillin, amoxicillin (aminopenicillins)

Mechanism

Same as penicillin. Wider spectrum; penicillinase
sensitive. Also combine with clavulanic acid

Ampicillin, amoxicillin (aminopenicillins)

Clinical use

Extended-spectrum penicillin––certain gram-positive bacteria and gram-negative rods "HELPS" (Haemophilus influenzae, E. coli, Listeria monocytogenes, Proteus mirabilis, Salmonella, enterococci).

Ampicillin, amoxicillin (aminopenicillins)

Toxicity

Hypersensitivity reactions; ampicillin rash;
pseudomembranous colitis.

combine with clavulanic acid
(penicillinase inhibitor) to enhance spectrum.

Ampicillin, amoxicillin (aminopenicillins)

Ampicillin, amoxicillin (aminopenicillins)

wrt combinations

combine with clavulanic acid
(penicillinase inhibitor) to enhance spectrum.

penicillin forms

Penicillin G (IV form), penicillin V (oral)

aminopenicillins

aka

Ampicillin, amoxicillin

Ampicillin, amoxicillin

aka

aminopenicillins

anti-pseudomonals

aka

TCP: Takes Care of
Pseudomonas.

Ticarcillin, carbenicillin, piperacillin

Ticarcillin, carbenicillin, piperacillin

aka

TCP: Takes Care of
Pseudomonas.

anti-pseudomonals

use with clavulanic acid.

Ticarcillin, carbenicillin, piperacillin (anti-pseudomonals)

Ampicillin, amoxicillin (aminopenicillins)

Ticarcillin, carbenicillin, piperacillin (anti-pseudomonals)

use wit

clavulanic acid (penicillinase inhibitor) to enhance spectrum.

Ticarcillin, carbenicillin, piperacillin

Mechanism

Same as penicillin. Extended spectrum.

Ticarcillin, carbenicillin, piperacillin

Clinical use

Pseudomonas spp. and gram-negative rods;

Ticarcillin, carbenicillin, piperacillin

Toxicity

Hypersensitivity reactions.

β-lactam drugs that inhibit cell wall synthesis but are
less susceptible to penicillinases. Bactericidal.

Cephalosporins

Cephalosporins

Mechanism

β-lactam drugs that inhibit cell wall synthesis but are
less susceptible to penicillinases. Bactericidal.

1st generation Cephalosporins

Clinical use

PEcK.

gram-positive cocci, Proteus mirabilis, E. coli, Klebsiella
pneumoniae.

2nd generation Cephalosporins

Clinical use

HEN PEcKS.

gram-positive cocci, Haemophilus influenzae,
Enterobacter aerogenes, Neisseria spp., Proteus, E. coli, Klebsiella , Serratia.

3rd generation Cephalosporins

Clinical use

serious gram-negative infections resistant to other
β-lactams; meningitis (most penetrate the blood-brain
barrier). Examples: ceftazidime for Pseudomonas;
ceftriaxone for gonorrhea.

4th generation Cephalosporins

Clinical use

↑ activity against Pseudomonas and gram-positive organisms.

Cephalosporins

Toxicity

Hypersensitivity reactions. Cross-hypersensitivity with
penicillins occurs in 5–10% of patients. nephrotoxicity of aminoglycosides; Disulfiram type reaction with ethanol

which Cephalosporins

Disulfiram type reaction with ethanol

with a methylthiotetrazole group, e.g., cefamandole

1st generation Cephalosporins

Names

1st generation...All cephalosporin sounds like CEF except 1st generation in 1st generation there is PH rather CEF like..->CePHalothin ,CePHaprin, CePHradine, CePHalexin

dont be FAZed, this exception is out O' LINe ..CeFAZOLIN

2nd generation Cephalosporins

Names

FOXes have FACe FUR

ceFOXitin, ceFAClor, ceFURoxime)–

3rd generation Cephalosporins

names

TRI to TAX TAZ
cefTRIaxone, cefoTAXime, cefTAZidime

4th generation Cephalosporins

names

Cefepime is the only one

what generation Cephalosporin is

cephalexin

1st generation

what generation Cephalosporin is

cefazolin

1st generation

what generation Cephalosporin is

cefuroxime

2nd generation

what generation Cephalosporin is

cefaclor

2nd generation

what generation Cephalosporin is

cefoxitin

2nd generation

what generation Cephalosporin is

ceftriaxone

3rd generation

what generation Cephalosporin is

cefotaxime

3rd generation

what generation Cephalosporin is

ceftazidime

3rd generation

what generation Cephalosporin is

cefepime

4th generation

Aztreonam

Mechanism

A monobactam resistant to β-lactamases. Inhibits cell wall synthesis (binds to PBP3). Synergistic with aminoglycosides. No cross-allergenicity with penicillins.

Aztreonam

Clinical use

Gram-negative rods––Klebsiella spp., Pseudomonas spp., Serratia spp. No activity against
gram-positives or anaerobes. For penicillin-allergic patients and those with renal
insufficiency who cannot tolerate aminoglycosides.

Aztreonam

Toxicity

Usually nontoxic; occasional GI upset.

Synergistic with aminoglycosides. No cross-allergenicity with penicillins.

Aztreonam

Gram-negative rods––Klebsiella spp., Pseudomonas spp., Serratia spp. No activity against
gram-positives or anaerobes. For penicillin-allergic patients and those with renal
insufficiency who cannot tolerate aminoglycosides.

Aztreonam

Imipenem/cilastatin, meropenem

Mechanism

Imipenem is a broad-spectrum, β-lactamase-resistant
carbapenem.

Imipenem/cilastatin, meropenem

Clinical use

Gram-positive cocci, gram-negative rods, and
anaerobes. Drug of choice for Enterobacter (esp UTI)

Imipenem/cilastatin, meropenem

Toxicity

GI distress, skin rash, and CNS toxicity (seizures) at high plasma levels.

Always administered with cilastatin

Imipenem

Imipenem Always administered with what and why

Always administered with cilastatin (inhibitor of renal dihydropeptidase I) to ↓
inactivation in renal tubules.

With imipenem, “the kill is
LASTIN’ with ciLASTATIN.”

Drug of choice for Enterobacter.

Imipenem/cilastatin, meropenem

Vancomycin

Mechanism and resistance

Inhibits cell wall mucopeptide formation by binding D-ala D-ala portion of cell wall precursors. Bactericidal. Resistance occurs with amino acid change of D-ala D-ala to
D-ala D-lac.

Vancomycin

Clinical use

Used for serious, gram-positive multidrug-resistant organisms, including S. aureus and Clostridium difficile (pseudomembranous colitis).

Vancomycin

Toxicity

Nephrotoxicity, Ototoxicity, Thrombophlebitis, diffuse flushing––“red man syndrome”
(can largely prevent by pretreatment with antihistamines and slow infusion rate). Well tolerated in general––does NOT have many problems.

Nephrotoxicity, Ototoxicity, Thrombophlebitis, diffuse flushing

“red man syndrome” Vancomycin

Inhibits cell wall mucopeptide formation by binding D-ala D-ala portion of cell wall precursors. Bactericidal. Resistance occurs with amino acid change of D-ala D-ala to
D-ala D-lac.

Vancomycin

30S inhibitors:

A = Aminoglycosides [bactericidal]
T = Tetracyclines [bacteriostatic]

50S inhibitors:

C = Chloramphenicol, Clindamycin
E = Erythromycin [bacteriostatic]
L = Lincomycin [bacteriostatic]
L = Linezolid [bacteriostatic]

Aminoglycosides

names

Gentamicin, Neomycin, Amikacin, Tobramycin, Streptomycin.

“Mean” GNATS canNOT
kill anaerobes.

Aminoglycosides

Mechanism and resistance

Bactericidal; inhibit formation of initiation complex and cause misreading of mRNA. Require O2 for
uptake; therefore ineffective against anaerobes.

Aminoglycosides

Clinical use

Severe gram-negative rod infections. Synergistic with
β-lactam antibiotics. Neomycin for bowel surgery.

Aminoglycosides

Toxicity

Nephrotoxicity (especially when used with cephalosporins ,Ototoxicity (especially when
used with loop diuretics). Teratogen.
-“Mean” GNATS canNOT kill anaerobes.

Severe gram-negative rod infections. Synergistic with
β-lactam antibiotics.

Aminoglycosides

Bactericidal; inhibit formation of initiation complex
and cause misreading of mRNA. Require O2 for
uptake; therefore ineffective against anaerobes.

Aminoglycosides

Gentamicin, Neomycin, Amikacin, Tobramycin, Streptomycin.

Aminoglycosides

Tetracyclines

names

-CYCLINE

TetracCYCLINE, doxyCYCLINE, demecloCYCLINE, minoCYCLINE.

Tetracyclines

Mechanism

bind to 30S and prevent attachment of aminoacyl-tRNA; limited CNS penetration.

Tetracyclines

Clinical use

VACUUM THe BedRoom.
Vibrio cholerae, Acne, Chlamydia, Ureaplasma
Urealyticum, Mycoplasma pneumoniae, Tularemia,
H. pylori, Borrelia burgdorferi (Lyme disease), Rickettsia.

Tetracyclines

Toxicity

GI distress, discoloration of teeth and inhibition of
bone growth in children, photosensitivity.

bind to 30S and prevent attachment of aminoacyl-tRNA; limited CNS penetration.

Tetracyclines

Tetracyclines

contraindications

-Doxycycline is fecally eliminated and can be used
in patients with renal failure.
-Contraindicated in pregnancy.

Must NOT take with milk, antacids, or iron-containing
preparations because divalent cations inhibit its
absorption in the gut.

Tetracyclines

GI distress, discoloration of teeth and inhibition of
bone growth in children, photosensitivity.

Tetracyclines

Macrolides

names

Erythromycin, azithromycin, clarithromycin.

Macrolides

Mechanism

Inhibit protein synthesis by blocking translocation; bind to the 23S rRNA of the 50S

Macrolides

Clinical use

URIs, pneumonias, STDs––gram-positive cocci (streptococcal infections in patients
allergic to penicillin), Mycoplasma, Legionella, Chlamydia, Neisseria.

Macrolides

Toxicity

GI discomfort (most common cause of noncompliance), acute cholestatic hepatitis,
eosinophilia, skin rashes. Increases serum concentration of theophyllines, oral
anticoagulants.

eosinophilia, skin rashes. Increases serum concentration of theophyllines, oral
anticoagulants.

Macrolides

Inhibit protein synthesis by blocking translocation; bind to the 23S rRNA of the 50S

Macrolides

Clindamycin

Mechanism

Blocks peptide bond formation at 50S ribosomal subunit.

Clindamycin

Clinical use

Treats anaerobes above the
diaphragm.
(e.g., Bacteroides fragilis,
Clostridium perfringens).

Clindamycin

Toxicity

Pseudomembranous colitis (C. difficile overgrowth),
fever, diarrhea.

Sulfonamides

names

Sulfamethoxazole (SMX), sulfisoxazole, triple sulfas, sulfadiazine.

Sulfonamides

Mechanism

PABA antimetabolites inhibit dihydropteroate synthase.

Sulfonamides

Clinical use

Gram-positive, gram-negative, Nocardia, Chlamydia. Triple sulfas or SMX for simple UTI.

Sulfonamides

Toxicity

Hypersensitivity reactions, hemolysis if G6PD deficient, nephrotoxicity (TIN), kernicterus in infants, displace other drugs from albumin (e.g., warfarin).

Hypersensitivity reactions, hemolysis if G6PD deficient, nephrotoxicity (TIN), kernicterus in infants, displace other drugs from albumin (e.g., warfarin).

Sulfonamides

Trimethoprim

Mechanism

Inhibits bacterial dihydrofolate reductase.

Trimethoprim

Clinical use

Combination TMP-SMX used for recurrent UTIs, Shigella,Salmonella, Pneumocystis carinii pneumonia.

Trimethoprim

Toxicity

Trimethoprim = TMP:
“Treats Marrow Poorly.”

Megaloblastic anemia, leukopenia, granulocytopenia.
(May alleviate with supplemental folinic acid.)

Why TMP with SMX

synergy

Trimethoprim

Toxicity Tx

Megaloblastic anemia, leukopenia, granulocytopenia.
(May alleviate with supplemental folinic acid.)

Fluoroquinolones

names

-Floxacin (fluoroquinolones)

and

nalidixic acid (a quinolone).

Fluoroquinolones

Mechanism

Inhibit DNA gyrase (topoisomerase II)

Fluoroquinolones

Clinical use

Gram-negative rods of urinary and GI tracts (including Pseudomonas), Neisseria,

Fluoroquinolones

Toxicity

GI upset, superinfections, skin rashes, headache,
dizziness.
Contraindicated in pregnant women and in children damage to cartilage. Tendonitis and tendon rupture in adults;
leg cramps and myalgias in kids.
FluoroquinoLONES hurt
attachments to your
BONES.

GI upset, superinfections, skin rashes, headache,
dizziness.
Contraindicated in pregnant women and in children damage to cartilage. Tendonitis and tendon rupture in adults;
leg cramps and myalgias in kids.

Fluoroquinolones

Inhibit DNA gyrase (topoisomerase II)

Fluoroquinolones

Metronidazole

Mechanism

Forms toxic metabolites in the bacterial cell.

Metronidazole

Clinical use

GET GAP on the Metro!
Anaerobic infection below
the diaphragm.

Antiprotozoal. Giardia, Entamoeba, Trichomonas,
Gardnerella vaginalis, anaerobes (Bacteroides,
Clostridium). Used with bismuth and amoxicillin (or tetracycline) for “triple therapy” against H. Pylori.

Metronidazole

Toxicity

Disulfiram-like reaction with alcohol; headache, metallic taste.

Disulfiram-like reaction with alcohol; headache, metallic taste.

Metronidazole

Polymyxins

names

Polymyxin B, polymyxin E.

Polymyxins

Mechanism

’MYXins MIX up membranes.

Bind to cell membranes of bacteria and disrupt
their osmotic properties. Polymyxins are cationic, basic proteins that act like detergents.

Polymyxins

Clinical use

Resistant gram-negative infections.

Polymyxins

Toxicity

Neurotoxicity, acute renal tubular necrosis.

Anti-TB drugs

names and complications

INH-SPiRE (inspire). 2C

-Isoniazid (INH),
-Streptomycin,
-Pyrazinamide,
-Rifampin,
-Ethambutol.
-Cycloserine (2nd-line therapy).

All are hepatotoxic.

Isoniazid aka

INH

INH aka

Isoniazid

Isoniazid (INH)

Mechanism

↓ synthesis of mycolic acids.

Isoniazid (INH)

Clinical use

Mycobacterium tuberculosis. The only agent used as solo prophylaxis against TB.

Isoniazid (INH)

Toxicity

"INH Injures Neurons and
Hepatocytes"

Hemolysis if G6PD deficient, neurotoxicity, hepatotoxicity, SLE-like syndrome.
Pyridoxine (vitamin B6) can prevent neurotoxicity.

Isoniazid (INH)

half-life

Different INH half-lives in fast
vs. slow acetylators.

Rifampin

Mechanism

Inhibits DNA-dependent RNA polymerase.

Rifampin

Clinical use

Mycobacterium tuberculosis; delays resistance to
dapsone when used for leprosy. Used for meningococcal prophylaxis and chemoprophylaxis in contacts of children with
Haemophilus influenzae type B.

Rifampin

Toxicity

Minor hepatotoxicity and drug interactions (↑ P-450).

orange body fluids

Inhibits DNA-dependent RNA polymerase.

Rifampin

↓ synthesis of mycolic acids.

Isoniazid (INH)

Minor hepatotoxicity and drug interactions (↑ P-450).

orange body fluids

Rifampin

Rifampin mnemonic

Rifampin’s 4 R’s:
RNA polymerase inhibitor
Revs up microsomal P-450
Red/orange body fluids
Rapid resistance if used
alone

Resistance mechanisms for various antibiotics

Penicillins/
cephalosporins

β-lactamase cleavage of β-lactam ring

Resistance mechanisms for various antibiotics

β-lactamase cleavage of β-lactam ring

Penicillins/
cephalosporins

Resistance mechanisms for various antibiotics

Aminoglycosides

Modification via acetylation, adenylation, or phosphorylation

Resistance mechanisms for various antibiotics

Modification via acetylation, adenylation, or phosphorylation

Aminoglycosides
and
Chloramphenicol (acetylation only)

Resistance mechanisms for various antibiotics

Vancomycin

Terminal D-ala of cell wall component replaced with D-lac; ↓ affinity.

Resistance mechanisms for various antibiotics

Terminal D-ala of cell wall component replaced with D-lac; ↓ affinity.

Vancomycin

Resistance mechanisms for various antibiotics

Chloramphenicol

Modification via acetylation

Resistance mechanisms for various antibiotics

Macrolides

Methylation of rRNA near erythromycin’s ribosome-binding site

Resistance mechanisms for various antibiotics

Methylation of rRNA near erythromycin’s ribosome-binding site

Macrolides

Resistance mechanisms for various antibiotics

↓ uptake or ↑ transport out of cell

Tetracycline

Resistance mechanisms for various antibiotics

Tetracycline

↓ uptake or ↑ transport out of cell

Resistance mechanisms for various antibiotics

Sulfonamides

Altered enzyme (bacterial dihydropteroate synthetase), ↓ uptake, or ↑ PABA synthesis

Resistance mechanisms for various antibiotics

Altered enzyme (bacterial dihydropteroate synthetase), ↓ uptake, or ↑ PABA synthesis

Sulfonamides

Nonsurgical antimicrobial prophylaxis

Meningococcal infection

Rifampin (drug of choice), minocycline.

Nonsurgical antimicrobial prophylaxis

Rifampin (drug of choice), minocycline.

Meningococcal infection

Nonsurgical antimicrobial prophylaxis

Gonorrhea

Ceftriaxone.

Nonsurgical antimicrobial prophylaxis

Ceftriaxone.

Gonorrhea

Nonsurgical antimicrobial prophylaxis

penicillin.

Syphilis (Benzathine penicillin G)

Endocarditis with surgical or dental procedures (penicillin)

Nonsurgical antimicrobial prophylaxis

Syphilis

Benzathine penicillin G.

Nonsurgical antimicrobial prophylaxis

TMP-SMX.

-History of recurrent UTIs

Pneumocystis jiroveci
pneumonia

Nonsurgical antimicrobial prophylaxis

-History of recurrent UTIs

TMP-SMX.

Nonsurgical antimicrobial prophylaxis

TMP-SMX (DOC) , aerosolized pentamidine.

Nonsurgical antimicrobial prophylaxis

Endocarditis with surgical or dental procedures

Penicillins.

Amphotericin B

Mechanism

Amphotericin “tears” holes in
the fungal membrane by forming pores.

Binds ergosterol (unique to fungi); forms membrane
pores that allow leakage of electrolytes and
disrupt homeostasis.

Amphotericin B

Clinical use

Used for wide spectrum of systemic mycoses.
Cryptococcus, Blastomyces, Coccidioides,
Aspergillus, Histoplasma, Candida, Mucor (systemic mycoses). Intrathecally for fungal meningitis; does not cross blood-brain barrier.

Amphotericin B

Toxicity

Fever/chills (“shake and bake”), hypotension, nephrotoxicity, arrhythmias, anemia, IV phlebitis
(“amphoterrible”). Hydration reduces nephrotoxicity.

Nystatin

mechanism

Binds to ergosterol, disrupting fungal membranes

Nystatin

Clinical use

Too toxic for systemic use.

“Swish and swallow” for oral candidiasis (thrush); topical for diaper rash or vaginal
candidiasis.

Binds to ergosterol, disrupting fungal membranes. Too toxic for systemic use.

Nystatin

-AZOLES

Mechanism

Inhibit fungal steroid (ergosterol) synthesis. by blocking the final step from Lanosterol to ergosterol

-AZOLES

Clinical use and which ones

Systemic mycoses. Fluconazole for cryptococcal meningitis in AIDS patients and candidal
infections of all types (i.e., yeast infections). Ketoconazole for Blastomyces, Coccidioides,
Histoplasma, Candida albicans; hypercortisolism.

-AZOLES

Toxicity

Hormone synthesis inhibition (gynecomastia), liver dysfunction (inhibits cytochrome
P-450), fever, chills.

Inhibit fungal steroid (ergosterol) synthesis. by blocking the final step from Lanosterol to ergosterol

-AZOLES

Flucytosine

Mechanism

Inhibits DNA synthesis by conversion to fluorouracil, which competes with uracil.

Flucytosine

Clinical use

Used in systemic fungal infections (e.g., Candida, Cryptococcus).

Flucytosine

Toxicity

Nausea, vomiting, diarrhea, bone marrow suppression.

Terbinafine
Mechanism

Inhibits the fungal enzyme squalene epoxidase. by blocking the initial step from squaline to Lanosterol (in ergesterol synthesis)

Terbinafine

Clinical use

Used to treat dermatophytoses (especially onychomycosis).

Inhibits the fungal enzyme squalene epoxidase. by blocking the initial step from squaline to Lanosterol (in ergesterol synthesis)

Terbinafine

Caspofungin

Mechanism

Inhibits cell wall synthesis.

Caspofungin

Clinical use

Invasive aspergillosis.

Caspofungin

Toxicity

GI upset, flushing.

Tx for Invasive aspergillosis.

Caspofungin

Griseofulvin

Mechanism

Interferes with microtubule function; disrupts mitosis. Deposits in keratin-containing
tissues (e.g., nails).

Griseofulvin

Clinical use

Oral treatment of superficial infections; inhibits growth of dermatophytes (tinea,
ringworm).

Griseofulvin

Toxicity

Teratogenic, carcinogenic, confusion, headaches, ↑ P-450 and warfarin metabolism.

antifunfal that is Teratogenic, carcinogenic, confusion, headaches, ↑ P-450 and warfarin metabolism.

Griseofulvin

Oral treatment of superficial infections; inhibits growth of dermatophytes (tinea,
ringworm).

Griseofulvin

Interferes with microtubule function; disrupts mitosis. Deposits in keratin-containing tissues

Griseofulvin

Amantadine

Mechanism

“A man to dine” takes off his
coat.

Blocks viral penetration/uncoating (M2 protein); may buffer pH of endosome. Also causes the
release of dopamine from intact nerve terminals.

Amantadine

Clinical use

Prophylaxis and treatment for influenza A and rubellA; Parkinson’s disease.

Amantadine

Toxicity

Ataxia, dizziness, slurred speech.

Amantadine

Mechanism of resistance

Mutated M2 protein. In 2006, 90% of influenza A were resistant to amantadine.

Amantadine

mnemonic

Amantadine blocks influenza
A and rubellA and causes problems with the cerebellA.

Rimantidine

a derivative of Amantadine with fewer CNS side effects. Does not cross the BBB.

a derivative of Amantadine with fewer CNS side effects. Does not cross the BBB.

Rimantidine

Zanamivir, oseltamivir

Mechanism

Inhibit influenza neuraminidase. So release of progeny virus is decreased.

Zanamivir, oseltamivir

Clinical use

Both influenza A and B.

Blocks viral penetration and uncoating (M2 protein);

Amantadine

Inhibit influenza neuraminidase

Zanamivir, oseltamivir

Ribavirin

Mechanism

Inhibits synthesis of guanine nucleotides by competitively inhibiting IMP dehydrogenase.

Ribavirin

Clinical use

RSV, chronic hepatitis C.

Ribavirin

Toxicity

Hemolytic anemia. Severe teratogen.

drug for

RSV, chronic hepatitis C.

Ribavirin

Inhibits synthesis of guanine nucleotides by competitively inhibiting IMP dehydrogenase.

Ribavirin

Acyclovir

Mechanism

Preferentially inhibits viral DNA polymerase when phosphorylated by viral thymidine
kinase.

Acyclovir

Clinical use

HSV, VZV, EBV. Mucocutaneous and genital herpes lesions. Prophylaxis in
immunocompromised patients.

Acyclovir

Toxicity

Delirium, tremor, nephrotoxicity.

Acyclovir

Mechanism of resistance

Lack of thymidine kinase.

drug for

Prophylaxis and treatment for influenza A;
Parkinson’s disease.

Amantadine

drug for

Both influenza A and B.

Zanamivir, oseltamivir

drug for

CMV, especially in immunocompromised patients.

Ganciclovir

Ganciclovir

Mechanism

Phosphorylation by viral kinase; preferentially inhibits CMV DNA polymerase.

Ganciclovir

Clinical use

CMV, especially in immunocompromised patients.

Ganciclovir

Toxicity

Leukopenia, neutropenia, thrombocytopenia, renal toxicity. More toxic to host enzymes
than acyclovir.

Ganciclovir

Mechanism of resistance

Mutated CMV DNA polymerase or lack of thymidine kinase.

Preferentially inhibits viral DNA polymerase when phosphorylated by viral thymidine kinase.

Acyclovir

Phosphorylation by viral kinase; preferentially inhibits CMV DNA polymerase.

Ganciclovir

Foscarnet

Mechanism

FOScarnet = pyroFOSphate
analog.

Viral DNA polymerase inhibitor that binds to the
pyrophosphate binding site of the enzyme. Does not require activation by viral kinase.

Foscarnet

Clinical use

CMV retinitis in immunocompromised patients
when ganciclovir fails; acyclovir-resistant HSV.

Foscarnet

Toxicity

Nephrotoxicity.

Foscarnet

Mechanism of resistance

Mutated DNA polymerase.

drug for

CMV retinitis in immunocompromised patients
when ganciclovir fails;

Foscarnet

drug for

acyclovir-resistant HSV.

Foscarnet

HIV therapy
Protease inhibitors

names

SaquiNAVIR, ritoNAVIR, indiNAVIR, nelfiNAVIR, ampreNAVIR.

NAVIR (navir) tease a pro—
pro-tease inhibitors.

HIV therapy
Protease inhibitors

Mechanism

Inhibit assembly of new virus by blocking protease
in progeny virions.

HIV therapy
Protease inhibitors

Toxicity

GI intolerance (nausea, diarrhea), hyperglycemia,
lipodystrophy, thrombocytopenia (indinavir).

HIV therapy
Reverse transcriptase inhibitors
Nucleosides

names

DINE , SINE, and BINE

Zidovudine (AZT), didanosine (ddI), zalcitabine (ddC),
stavudine (d4T), lamivudine (3TC),

Zidovudine (AZT), didanosine (ddI), zalcitabine (ddC),
stavudine (d4T), lamivudine (3TC),

HIV therapy
Reverse transcriptase inhibitors
Nucleosides

SaquiNAVIR, ritoNAVIR, indiNAVIR, nelfiNAVIR, ampreNAVIR.

HIV therapy
Protease inhibitors

NAVIR (navir) tease a pro—
pro-tease inhibitors.

HIV therapy
Reverse transcriptase inhibitors
Non-nucleosides

names

Nevirapine, efavirenz, delavirdine.

Never Ever Deliver nucleosides.

Nevirapine, efavirenz, delavirdine.

HIV therapy
Reverse transcriptase inhibitors
Non-nucleosides

Never Ever Deliver nucleosides.

HIV therapy
Reverse transcriptase inhibitors

Mechanism

Preferentially inhibit reverse transcriptase of HIV;
prevent incorporation of viral genome into host DNA.

HIV therapy
Reverse transcriptase inhibitors

Toxicity

Bone marrow suppression (neutropenia, anemia),
peripheral neuropathy, lactic acidosis (nucleosides), rash (non-nucleosides), megaloblastic anemia (AZT).

HIV therapy
Reverse transcriptase inhibitors

Clinical use

Highly active antiretroviral therapy (HAART) generally entails combination therapy with protease inhibitors and reverse transcriptase.
AZT is used during pregnancy to reduce risk of fetal
transmission.

HAART

when initiated

protease inhibitors and reverse transcriptase
inhibitors. Initiated when patients have low CD4
counts (< 500 cells/mm3) or high viral load.

HIV therapy

what is used during pregnancy to reduce risk of fetal
transmission.

AZT

Interferons

Mechanism

Glycoproteins from human leukocytes that block various stages of viral RNA and DNA
synthesis. Induce ribonuclease that degrades viral mRNA.

Interferons

Clinical use

IFN-α––chronic hepatitis B and C, Kaposi’s sarcoma.
IFN-β––MS.
IFN-γ––NADPH
oxidase deficiency.

Interferons

Toxicity

Neutropenia.

Antibiotics to avoid in pregnancy

just names

SAFE Moms Take Really Good Care.

Sulfonamides, Aminoglycosides,
Fluoroquinolones, Erythromycin, Metronidazole, Tetracyclines, Ribavirin,
Griseofulvin, Chloramphenicol

Antibiotics to avoid in pregnancy problem/cause

Sulfonamides

kernicterus

Antibiotics to avoid in pregnancy problem/cause

kernicterus

Sulfonamides

Antibiotics to avoid in pregnancy problem/cause

Aminoglycosides

ototoxicity

Antibiotics to avoid in pregnancy problem/cause

ototoxicity

Aminoglycosides

Antibiotics to avoid in pregnancy problem/cause

Fluoroquinolones

cartilage damage.

Antibiotics to avoid in pregnancy problem/cause

cartilage damage.

Fluoroquinolones

Antibiotics to avoid in pregnancy problem/cause

Erythromycin

acute cholestatic hepatitis in mom

Antibiotics to avoid in pregnancy problem/cause

acute cholestatic hepatitis in mom

Erythromycin

Antibiotics to avoid in pregnancy problem/cause

Metronidazole

mutagenesis.

Antibiotics to avoid in pregnancy problem/cause

mutagenesis.

Metronidazole

Antibiotics to avoid in pregnancy problem/cause

teratogenic.

Ribavirin
Griseofulvin

Antibiotics to avoid in pregnancy problem/cause

Tetracyclines

discolored teeth, inhibition of bone growth.

Antibiotics to avoid in pregnancy problem/cause

discolored teeth, inhibition of bone growth.

Tetracyclines

Antibiotics to avoid in pregnancy problem/cause

Ribavirin

teratogenic.

Antibiotics to avoid in pregnancy problem/cause

Griseofulvin

teratogenic.

Antibiotics to avoid in pregnancy problem/cause

“gray baby.”

Chloramphenicol

Antibiotics to avoid in pregnancy problem/cause

Chloramphenicol

“gray baby.”

uses of Antiparasitic drugs

Ivermectin

Onchocerciasis (rIVER blindness treated with IVERmectin).

uses of Antiparasitic drugs

Praziquantel

Trematode/fluke (e.g., schistosomes, Paragonimus, Clonorchis)

cysticercosis (tania solium)
Diphilobotorum latum

uses of Antiparasitic drugs

Primaquine

Latent hypnozoite (liver) forms of malaria (Plasmodium vivax, P. ovale).

uses of Antiparasitic drugs

Nifurtimox

Chagas’ disease, American trypanosomiasis (Trypanosoma cruzi ).

uses of Antiparasitic drugs

Suramin

African trypanosomiasis (sleeping sickness).