Antimicrobials Flashcards
What are the 3 main modes of actions of antibiotics
Inhibition of cell wall synthesis
Inhibition of Protein Synthesis
Inhibition of Nucleic Acid
What are the 2 main groups of antibiotics which inhibit the synthesis of the cell wall
B lactams
Glycopeptides
What are the 2 man groups of B-Lactams
Penicillins
Cephalosporins
What are the 2 main glycopeptide antibiotics
Vancomycin
Teicoplanin
What is the mechanism of action of penicillin
Inhibition of cell wall synthesis
What is the mechanism of action of Cephalosporins
Inhibition of cell wall synthesis
What is the mechanism of glycopeptide antibiotics
Inhibition of cell wall synthesis
Which 3 groups of antibiotic inhibit protein synthesis
Aminoglycosides
Macrolides
Tetracyclines
What is the action of aminoglycosides
Inhibition of protein synthesis
What is the main action of macrolides
Inhibition of Protein synthesis
What is the main action of tetracyclines
Inhibition of protein synthesis
What groups of antibiotics work by inhibition the synthesis of nuclei acid (DNA)
Trimethorprim/Sulfonamides
Quinolones
What is the main action of Trimethoprim
Inhibition of nuclei acid synthesis
What is the main action of Quinolones
Inhibition of Nuclei Acid Synthesis
Give examples of Penicillins
Benzylpenicillin
Amoxicillin
Flucloxacillin
Co-amoxiclav
Which organisms is benzylpenicillin effective against
Streptococci
Neisseria spirochetes
What is benzylpenicillin used to treat
Soft tissue Pneumococcal Meningococcal Syphillis Gonorrhoea
Pros of benzylpenicillin
It is cheap
Which organisms is amoxicillin effective against
Broad spectrum but resistance is common
Pro of amoxicillin
Cheap
Which organisms is flucloxacillin against
Staphylococci
Staph. Aureus infection
What is a pro of flucloxacillin
Cheap
Which organisms co-amoxiclav used to treat
Broad spectrum
What is co-amoxiclav effective against
UTI
RTI
Soft tissue infections
Surgical wounds
What is a con of co-amoxiclav
It is associated with C. Diff infection
Name the 4 Cephalosporins
Cefradine
Cefuroxime
Ceftriaxone
Ceftazidime
What is ceftriaxone used to treat
Hospital infections e.g bacteriaemia, Pneumonia
Con of ceftriaxone
C.diff infection
What is ceftazimide effective against
Psuedomonal infections in hospital and in CF
What is Cefradine used to treat
UTI
Soft tissue infection
Name 1 abx in aminoglycoside group
Gentamicin
What gram is gentamicin used to treat
Gram -ve
What is gentamicin used to treat
Serious gram -ve infections
Bacteriaemia
Endocarditis
Neutropenic sepsis
Cons of gentamicin
Nephrotoxicity
Ototoxicity
Name 3 macrolides
Clarithromycin
Erythromycin
Azithromycin
What is clarithromycin used to treat
Resp infection
Soft tissue
STD
What is erythromycin used to treat
Resp infection
Soft tissue infection
STD
Name 2 quinolones
Ciprofloxacin
Levofloxacin
Name the 2 glycopeptides
Vancomycin
Teicoplanin
Con of ciprofloxacin
Assoc with C diff infection
What is ciprofloxacin used to treat
Complicated UTI
Complicated hospital acquired pneumonia
Some GI infections
What is trimethoprim used to treat
UTI
Resp infection
MRSA
What is doxycycline used to treat
Q fever
Brucellosis
Chlamydia
Atypical pneumonia
What is Rifampicin used to treat
TB
MRSA
Meningococcal prophylaxis
What type of abx is co-trimoxazole
Broad spectrum
What is co-trimoxazole used to treat
Resp infection
Con of clindamycin
C/diff infection
What is metrondazole used to treat
Anaerobes
Protozoa (e.g parasitic infection)
Name 3 azole antifungals
Fluconzole
Itraconazole
Voriconazole
What is fluconazole used to treat
Candida
What is itraconazole and voriconazole used to treat
Candida and Aspergillus
What are terbinafine antifungals used to treat
Tinea
Fungal nail infections
Name 2 polyene antigufngals
Amphotericin
Nystatin
What is amphotericin used to treat
Candida and aspergillus
What is nystatin used to treat
Candida
Broad groups of antifungals
Azoles
Polyenes
Echinocandins
Terbinafine
Name 3 types of echinocandins
Caspofungin
Anidulafungin
Micafungin
Do antiviral eradicate virus from latently infected cells e.g HSV
No
When are antivirals use in chicken pox
Any increased risk of complications
Neonate
Immunocompromised
Pregnant
Rx used for shingles
Aciclovir
Valaciclovir
Famciclovir
Foscarnet
Which antivirals are used for chronic HBV infection
Pregylated interferon alpha
Nucleoside/tide analogues (e.g lamivudine, entecavir, adefovir)
Which antivirals are used to treat influenzae A or B
Oseltamivir
Zanamivir
What are the current anti-viral therapies for HCV
Pegylated interferon alpha
Ribavirin
Plus protease inhibitor (e.g telaprevir)
Which anti-viral is used in HSV infection
Aciclovir
How is aciclovir delivered in HSV encephalitis
IV
How is influenzae most commonly prevented
Vaccination
How quickly does influenzae treatment need to be given
<48hrs
Common problem with vancomycin
Toxicity