Alexander Shared "Micro-Antibiotics" - 20 Picmonics

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Micro-Antibiotics

Aminoglycosides
Drug Names
Gentamicin
Neomycin for Bowel Surgery Prep
Amikacin
Tobramycin
Streptomycin
Mechanism of Action
Bactericidal
Inhibit Formation of Initiation Complex
Cause Misreading of mRNA
Require O2 for Uptake
Resistance
Resistance by Transferase Enzymes
Acetylation
Phosphorylation
Adenylation
Indications
Gram-Negative Rod Infections
Synergistic with B-Lactam Antibiotics
Side Effects
Nephrotoxicity Especially When Used with Cephalosporins
Ototoxicity Especially When Used with Loop Diuretics
Teratogen
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5 mins
Fluoroquinolones Antibiotics
-floxacin
Mechanism of Action
Inhibits Topoisomerase II & IV
Bactericidal
Indications
Gram-negative Rods
Pneumonia
Gastrointestinal Infections
Urinary Tract Infection
Genital Infections
Drugs
Levofloxacin
Ciprofloxacin
Has Pseudomonas Coverage
Considerations
Avoid Polyvalent Cations
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3 mins
Rifampin
Tuberculosis (TB)
Blocks RNA Polymerization
Haemophilus influenzae Type B
Leprosy
Meningitis
P450 inducer
Red-orange urine
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55 secs
Tetracycline Drug Names and Indications
Drug Names
Demeclocycline
Minocycline
Doxycycline
Fecally Eliminated
Can be Used in Renal Failure
Indications
Antidiuretic Hormone Antagonist
Chlamydia
Rickettsia
Borrelia burgdorferi
Helicobacter Pylori
Mycoplasma Pneumonia
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3 mins
Tetracycline Mechanism
Binds to 30 S to Prevent Attachment of Aminoacyl tRNA
Limited CNS Penetration
Divalent Cations Inhibit Absorption
Must Not Take with Milk, Antacids, Iron
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1 min
Chloramphenicol
Mechanism
Bacteriostatic
Inhibits 50S Peptidyltransferase Activity
Indications
Meningitis
Rocky Mountain Spotted Fever in Pregnant Women
Side Effects
Anemia
Aplastic Anemia
Gray Baby Syndrome due to Decreased UDP-Glucuronyl Transferase
Resistance Caused by Plasmid Encoded Acetyltransferase
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2 mins
Macrolides
Bacteriostatic
Erythromycin
Azithromycin
Clarithromycin
Bind to 23S rRNA of 50S subunit
Inhibit protein synthesis by blocking translocation
Gram-Positive Cocci
Atypical pneumonia
Chlamydia
Resistance by methylation of 23S rRNA binding
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1 min
Polymyxins
Mechanism of Action
Cationic
Act Like Detergents
Bind to Cell Membranes of Bacteria
Disrupt Their Osmotic Properties
Indications
Resistant Gram-Negative Infections
Side Effects
Neurotoxicity
Renal tubular necrosis
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3 mins
Penicillin
Gram Positive
Spirochetes
Bind PBPs
Block Transpeptidase Cross-linking of Cell Wall
Activate Autolytic Enzymes
Bactericidal
Hypersensitivity Reactions
Hemolytic Anemia
Beta-lactamase Sensitive
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2 mins
Vancomycin Mechanism
Bacteriostatic and Bactericidal
Gram-Positive
Inhibits Cell Wall Mucopeptide
Binds to D-ala D-ala
Resistance with change to D-ala D-lac
Staphylococcus aureus
Orally for Clostridium difficile
Enterococci
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2 mins
Cephalosporins Overview
Mechanism of Action
Beta lactam drug
Inhibits cell wall synthesis
Bactericidal
Side Effects
Hypersensitivity reactions
Vitamin K Deficiency
Disulfiram like reaction with Alcohol
Increased Nephrotoxicity of Aminoglycosides
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1 min
Beta-Lactamase Inhibitors
Considerations
Often Combined with Penicillin Antibiotics
Drug Names
Clavulanic Acid
Sulbactam
Tazobactam
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51 secs
Isoniazid
Indications
Tuberculosis (TB)
Mechanism of Action
Requires Catalase Peroxidase
Decreases Mycolic Acid Synthesis
Fast vs Slow Acetylators
Side Effects
B6 Deficiency
Neurotoxicity
Hepatotoxicity
Drug-induced Lupus
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1 min
Ethambutol
Mechanism of Action
Bacteriostatic
Blocks Arabinosyltransferase
Arabinosyltransferase Polymerizes Carbohydrates
Carbohydrate Polymers Make Mycobacterium TB Cell Wall
Side Effects
Red/Green Color Blindness
Reversible with Drug Discontinuation
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39 secs
Sulfonamides Mechanisms
Bacteriostatic
Gram-Positive
Gram-Negative
Nocardia
Chlamydia
PABA antimetabolites
Inhibit dihydropteroate synthase
Sulfamethoxazole
Sulfisoxazole
Sulfadiazine
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1 min
Trimethoprim
Mechanism of Action
Bacteriostatic
Inhibits Bacterial Dihydrofolate Reductase
Causes Sequential Block of Folate Synthesis
Used in Combination with Sulfamethoxazole
Combination Used For Recurrent Urinary Tract Infections
Indications
Shigella
Salmonella
Pneumocystis Jiroveci Pneumonia
Side Effects
Decrease in Red and White Blood Cells
Alleviated with Leucovorin Rescue
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2 mins
Clindamycin
Mechanism of Action
Bacteriostatic
Binds 50S Ribosomal Subunit
Blocks Translocation
Indications
Anaerobic Infections above the Diaphragm
Aspiration Pneumonia
Lung Abscess
Side Effects
Can Cause Pseudomembranous Colitis
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1 min
Metronidazole
Mechanism of Action
Bactericidal
Forms Free Radical Toxic Metabolites
Damages DNA
Indications
Giardia lamblia
Entamoeba Histolytica
Trichomonas
Gardnerella
Anaerobes
Side Effects
Metallic taste
Disulfiram like Reaction with Alcohol
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2 mins
Protein Synthesis Inhibitors
Drug Names
30S inhibitors
Aminoglycosides
Tetracyclines
50S inhibitors
Chloramphenicol
Clindamycin
Erythromycin
Lincomycin
Linezolid
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3 mins
Eosinophilic Granulomatosis with Polyangiitis (Churg-Strauss Syndrome)
Pathophysiology
Granulomatous Vasculitis
Signs and Symptoms
Sinusitis
Skin Lesions
Peripheral Neuropathy
Asthma
GI Disease
Heart Disease
Kidney Failure
Diagnosis
Eosinophilia
p-ANCA
Treatment
Corticosteroids
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3 mins

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