Antibiotics Flashcards

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1
Q

Gram positive (continued)

A
Staph saprophyticus (young female,aggressively sexually active)
Nocardia sp
Corynebacterium sp 
Lactobacillus sp 
Listeria monocytogenes 
Mycobacterium aviu 
Propionibacterium acne
Clostridium botulinum, tetani and difficile
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2
Q

Gram Positive ( thick peptidoglycan layer)

A

Strep pneumoniae
Strep pyogenes (Group A Hemolytic strep)
Strep agalactiae ( Group B Hemolytic strep)
Strep bovis ( associated with colon cancer)
Viridans strep
Enterococcus faecalis
Enterococcus faecium
Staph aureus
Staph epidermis (prosthetic devices and catheters)

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3
Q

Gram negative (thin peptidoglycan layer)

A

Nisseria meningitidis
Nisseria gonnorrhea

Moxarella catarrhalis 
Pseudomonas aeruginosa
Bordatella pertussis
Legionella pneumophilia
Haemophilus influenzae 
Acinetobacter baumannii, calcoaceticus
Serration marcescens
Pasturella multocida (main bug in animal bites)
E. Coli
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4
Q

Gram negative (continued)

A
Klebsiella pneumoniae 
Proteus mirabilis 
Proteus vulgaris 
Shigella
Salmonella 
Bacteroides Species:
B. fragilis 
B. faecalis
B. vulgaris
B. adolescentia
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5
Q

Common Anaerobes

A
Enterbacteriaceae species
Lactobacillus species
Clostridium species
Bacteroides species
Enterococci species
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6
Q

Encapsulated ( ability to evade immune system so have vaccines for)

A

Streptococcus pneumoniae
Nisseria meningitidis
Haemophilus influenzae (type B)
Klebsiella pneumoniae

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7
Q

Atypical

A

Chlamydia
Legionella
Mycoplasma pneumoniae ( no cell wall)

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8
Q

Normal microbial flora in the body

Skin

A
Staph epidermis 
Staph aureus 
Strep pyogenes (can cause impetigo)
Corynebacterium 
Propionibacterium acnes 
Candida species
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9
Q

Normal microbial flora in the body

Mouth and oropharynx

A
Staph epidermis 
Staph aureus 
Beta Hemolytic streptococci
Strep pneumoniae 
Strep viridans 
Strep mutans (dental plaque)
Mozzarella catarrhalis 
Haemophilus influenzae 
Bacteroides species
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10
Q

Normal microbial flora in the body

Nose

A
Staph epidermis 
Strep pneumoniae 
Strep viridans 
Staph aureus 
Haemophilus influenzae 
Nisseria meningitidis
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11
Q

Normal microbial flora in the body

GI tract

A
Lactobacillus sp
Clostridium sp
Enterococci sp
Bacteroides sp - B vulgatus/ B fragilis 
Enterobacteriaceae- E. coli
Proteus mirabilis
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12
Q

Normal microbial flora in the body

Urethra

A
Staph epidermis 
Step sp
Bacteroides sp
Fusobacterium sp
F nucleatum 
Peptostreptococcos sp
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13
Q

Normal microbial flora in the body

Vagina

A
Lactobacillus acidophilus 
Group B hemolytic strep
Bacteroides sp
Peptostreptococcus sp
Gardnerella vaginalis 
Staph epidermis
Enterococcus
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14
Q

Class of drugs (Beta Lactamase)
Cell wall synthesis inhibitors

Penicillins

A

Aque. PCN G
Benzathine PCN G/ PCN V potassium
PCN-Resistant PCN (Gr+): Dicloxacillin, Nafcillin, Oxacillin
AminoPCN (Gr+&-): Amoxicillin, Ampicillin
Extended spectrum PCN (+,-,anaerobic): Ticarcillin,Pipercilin
BL inhibitors ( +,-,anaerobes,pseudo,enterococcus): Amoxicillin/Clav(no pseudo), Amp/SUB, Ticar/CA, Piper/TZ

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15
Q

Class of drugs (Beta Lactamase)
Cell wall synthesis inhibitors

Cephalosporins 1st generation (mostly Gr+ coverage)

A
Cephalexin 
Cefadroxil 
Cefazolin 
Ceflothin 
Cephradine
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16
Q

Class of drugs (Beta Lactamase)
Cell wall synthesis inhibitors

Cephalosporins 2nd Generation (mostly gram+ but some gram-)

A
Cefaclor 
Cefuroxime 
Cefprozil 
Loracarbef 
Cefoxitin 
Cefotetan
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17
Q

Class of drugs (Beta Lactamase)
Cell wall synthesis inhibitors

Cephalosporins 3rd Generation ( reduction in Gr+ coverage and increase in Gr- coverage including pseudomonas)

A
Cefdinir 
Cefixime 
Ceftibuten 
Cefotaxime 
Cefoperazone 
Ceftazidine 
Ceftriaxone
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18
Q

Class of drugs (Beta Lactamase)
Cell wall synthesis inhibitors

Cephalosporins 4th Generation ( improved both Gr+&- coverage including pseudomonas)

A

Cefepime

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19
Q

Class of drugs (Beta Lactamase)
Cell wall synthesis inhibitors

Monobactams ( cover one type of bacteria Gr - infection, cover pseudomonas)

A

Azactam

20
Q

Class of drugs (Beta Lactamase)
Cell wall synthesis inhibitors

Carbapenems ( covers MDR, pseudomonas,no coverage for enterococcus)

A

Imipenem/ Cilastatin( cilastatin prevents Imipenem induced nephrotoxicity

Meropenem
Ertapenem( no coverage over pseudomonas)
Doripenem

21
Q

Classes of Drugs (other types of cell wall synthesis inhibitors)

Glycopeptide

A

Vancomycin
MRSA (IV)
C-diff (PO)

SE: Anaphylactoid reaction (red face,torso), nephrotoxicity,ototoxicity, thrombophlebitis

22
Q

Classes of Drugs (other types of cell wall synthesis inhibitors)

Lipoglycopeptide (Telavancin)Vanco derivative

A

Skin infection caused by MRSA, strep pyogenes, enterococcus

SE: nephrotoxicity, c-diff, torsades,interference with some anticoagulantion testing

23
Q

Bacteriostatic

A

Do not kill bacteria, rely on existing immune system

ECSTaTiC
Erythromycin, Clindamycin, Sulfamethoxazole, Trimethroprim, Tetracycline, Chloramphenicol

24
Q

Bacteriocidal

A

Kills bacteria regardless of immune system

Very Finely Proficient At Cell Murder

Vancomycin, Fluroquinolones, Penicillin, Aminoglycosides, Cephalosporins, Metronidazole

25
Q

Class of drugs

Protein synthesis inhibitors

Macrolides
Gr+&-, atypical, good cellular penetration 50S

A

Erythromycin
Clarythromycin
Azithromycin

26
Q

Class of drugs

Protein synthesis inhibitors

Ketolides ( Gr +&-‘ atypical, MDR Strep pneumoniae) 50S

A

Telithromycin

Watch for liver toxicity, MG is a CI, visual disturbances

27
Q

Class of drugs

Protein synthesis inhibitors

Tetracyclines ( Gr -, anaerobes, atypical, MRSA, spores) 30 S

A

Tetracycline
Minocycline
Doxycycline
( teeth staining, decrease bone growth, chelates cations, DO NOT GIVE

28
Q

Class of drugs

Protein synthesis inhibitors

Glycylcyclines ( Gr+, -, anaerobes,MRSA, enterococcus)
Derivatives of Tretra. 30S

A

Tigercycline

Treats MRSA , enterococcus faecalis, may discolor teeth, solution red-orange

29
Q

Class of drugs

Protein synthesis inhibitors
Anaerobic agents( Gr +, some MRSA) bacteroides species that cause BV
A

Clindamycin
Lincomycin
SE: c diff, neutropenia,risk for pre term birth if cam used for BV

30
Q

Class of drugs

Protein synthesis inhibitors

Oxazolidinone ( Gr +, VRE, MDRs, pneumonia, diabetic foot infection, MRSA, CAP, ) 50S

A

Linezolid ( has MAO inhibitor properties may cause thrombocytopenia and myelosupression)

31
Q

Class of drugs

Protein synthesis inhibitors

Streptogramins ( Gr +, -, VRE, MRSA, MDRs, S. pneumoniae) 50 S

A

Quinupristin/dalfopristin ( phlebitis, incompatible with. NS, hyperbilirubinemia, arthralgias, myalgia so.

32
Q

Aminoglycosides ( Gr -, pseudomonas, proteus, serratia, Gr+ staph, anaerobes) 30S

A

Amikacin
Gentamicyn
Tobramycin( dose depends on peak concentrations needed for a particular infection and based on renal function)
SE: renal and ototoxicity, NEVER used for OM, only for OE

33
Q

Other classes of Antibiotics

Fluoroquinolones ( Gr+, -, anaerobes , atypicals, pseudomonas ( Cipro, Leva) enterococcus ( good cellular penetration)

A
Ciprofloxacin 
Levofloxacin
Moxifloxacin
Norfloxacin
Ofloxacin
Gemifloxacin
( not in pedis, may lead to tendon rupture, not in pregnancy, absorption issues if given with cations. Ophthalmic- frequency may be an issue
34
Q

Cyclc Lipopeptide ( Gr +, MRSA, enterococcus)

A

Daptomycin

35
Q

Anaerobic agents ( alternative agent for H. pylori, Protozoa, BV, FIRST LINE FOR Cdiff colitis, BV, & Parasitic infections

A

Metronidazole ( prodrug, avoid in 1st trimester, unpleasant taste, peripheral neuropathies, seizures, AVOID ETOH & propylene glycol, inhibitor of CYP2C9- be cautious with WARFARIN

36
Q

Trimethroprim/ Sulfamethoxazole ( Bactrim)

Bacteroides ( Gr+,-, Fungal, PJP/PCP)

A

Inhibit folic acid synthesis
SE: mild GI, RASH , BONE MARROW SUPPRESSION
Clinical issues: avoid in the last trimester or breastfeeding. Stephen Johnsons syndrome, inhibitor 2C9 warfarin, increase fluid intake, avoid sun exposure

37
Q
Sulfones
Bacteriostatic ( PJP/PCP) alternative in sulfa allergies
A

Dapsone

38
Q

Nitrofurantoin ( Gr +, -, that cause UTIs- prevention and treatment of UTIs)

A

Clinical issues: hemolytic anemia, prolonged use associated with pulmonary toxicity, peripheral neuropathy. Probenecid can inhibit its excretion, avoid in pregnancy, labor & delivery

39
Q

Antimycobacterials antitubercular

A
First line: 
INH
Rifampin
PZA
Ethambutol
40
Q

INH ( bacteriocidal)

A

Clinical issues

Injures neurons and hepatocytes, AVOID ETOH, depletes Vit B 6

41
Q

Rifampin ( bacteriocidal)

RNA polymerase inhibitor, Red urine/fluids, Ramps up enzymes, Rapid resistance when used alone

A

Used also as adjunct w beta lactams and glycopeptides for difficult Gr+ infections, Monotherapy only for prophylaxis: given to carries of N. Meningitidis
SE: hepatotoxic , all bodily fluids can became red hue , flulike symptoms.
Clinical issues: CYP3A4 inducer ( can lower concentrations of warfarin, OCs, anticonvulsant)

42
Q

Pyrazinamide (PZA): bacteriocidal

A

SE: Hyperuricemia

43
Q

Ethambutol ( bacteriocidal)

A

Must be combined with other agents
SE: optic neuritis, Hyperuricemia,
Clinical issues: Renal dose adjust, at least 2 hrs from antacids

44
Q

Antifungal
Ergosterol inhibitors
MOA: lipophilic drug binds to ergosterol
Amphotericin ( susceptible: Sporothrisx schenckii- from rose bushes thorns)

A

Dosing: premed w NSAID w or wo Benadryl or APAP
Oral candidiasis
Dermal infection
Clinical issues: give over 4-6 hrs, if given too fast cause chills, hypotension, only compatible with D5W
NEPHROTOXICITY ( bonus 250 cc IVF before and after infusion). MONITOR CBC, CHEM 7 ( can increase toxicity with Digoxin and neuromuscular blockers).

45
Q

Ergosterol inhibitors
MOA: lipophilic drug binds to ergosterol

Nystatin ( topical cream, powder, swish &swallow or vaginal tablet)

A

Used for cutaneous, mucocutaneous, and oral fungal infections
Frequency of dosage biggest issue

46
Q

Ergosterol inhibitors
MOA: lipophilic drug binds to ergosterol

Terbinafine

A

Treat Candida albicans, onychomycosis,
SE: GI , dysguesia, hepatotoxic ( get a AST, ALT as baseline and periodically thereafter)
Contraindications: CrCl