Common Antibacterial Activity - Gram Negative Bacteria

Microorganisms Associated to Gram Negative Diplococcus

Neisseria meningitidis

Treatment Options against Neisseria meningitidis

Penicillin G, 3rd Generation Cephalosporins (cefotaxime, ceftriaxone), Moxifloxacin, Ampicillin

Microorganisms Associated to Lactose-Fermenting / Oxidase-Negative Gram Negative Bacilli

Escherichia coli (Urinary Tract Infections)

Treatment Options against Escherichia coli (Urinary Tract Infections)

Ampicillin, Amoxicillin/Clavulanate, 1st Generation Cephalosporin,

Ceftriaxone,

Meropenam,

Aminoglycosides,

Beta-Lactam/Beta-Lactamase Inhibitor Combo,

Trimethoprim/Sulfomethoxazole,

Fluoroquinolone,

Nitrofurantoin (cystitis only)

Microorganisms Associated to Non-Enteric Gram Negative Bacilli

Legionella spp.

Treatment Options for Legionella spp.

Macrolide (azithromycin),

Fluoroquinolones

Microorganisms Associated to Non-Lactose-Fermenting / Oxidase-Positive Gram Negative Bacilli

Pseudomonas aeruginosa

Treatment Options against Pseudomonas aeruginosa

Piperacillin/tazobactam, 3rd Generation Cephalosporin (ceftazidime), 4th Generation Cephalosporin (cefepime),

Carbapenem (meropenem, doripenem, impenem/cilastatin),

FQ (ciprofloxacin, levofloxacin, delafloxacin - some strains),

Aztreonam,

Aminoglycoside (gentamicin, tobramycin, amikacin) (UTI only)

Microorganisms Associated With Atypical organisms

Chlamydia pneumoniae, Mycoplasma pneumoniae

Treatment Options against Chlamydia pneumoniae & Mycoplasma pneumoniae

Macrolides (azithromycin, clarithromycin),

Fluoroquinolone,

Doxycycline