Updated: 2/5/2018

Gram-Negative Bacteria

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Microbiology Overview
 

Gram-Negative Overview
 

Gram-Negative Bacteria Table
 
Cocci
Bacteria Disease Treatment
Neisseria meningitidis 
  • Meningococcemia 
  • Waterhouse-Friderichsen syndrome
  • Meningitis
  • Ceftriaxone
  • Ampicillin
  • Rifampin
Neisseria gonorrhoeae 
  • Gonorrhea (urethritis and PID)
  • Neonatal conjunctivitis
  • Septic arthritis
  • Fitz-Hugh-Curtis syndrome
  • Ceftriaxone
Bacilli
Enterics
Escherichia coli 
  • Normal colonic flora
  • Diarrhea
  • UTI
  • Meningitis (neonatal)
  • Sepsis
  • Pneumonia
  • Hemolytic-uremic syndrome
  • Cystitis
  • Pyelonephritis

 

  • Disease-dependent
Salmonella typhi 
  • Typhoid fever
  • Fluoroquinolones
Salmonella enteridis 
  • Enterocolitis/gastroenteritis
  • Septicemia
  • Osteomyelitis (sickle cell)
  • Ampicillin (GI is self-limiting)
Shigella dysenteriae 
  • Shigellosis (dystentery)
  • Fluoroquinolones
Klebsiella pneumoniae 
  • Pneumonia
  • UTI
  • Sepsis
  • Cephalosporin (3rd generation)
Serratia 
  • UTI
  • Wound infections
  • Pneumonia
  • Septicemia
  • Kidney stones
  • Cefotaxime
Proteus 
  • UTI
  • Septicemia
  • Kidney stones
  • Fluoroquinolones
Campylobacter jejuni 
  • Gastroenteritis
  • Guillain-Barré syndrome
  • Self-limiting
Vibrio cholerae 
  • Cholera
  • Doxycycline
Vibrio parahaemolyticus/vulnificus 
  • Seafood diarrhea
  • Self-limiting
Helicobacter pylori 
  • Duodenal ulcers
  • Chronic gastritis
  • Gastric ulcers
  • Stomach cancer
  • Metronidazole
  • Omeprazole
  • Clarithromycin
Pseudomonas aeruginosa 
  • "BE PSEUDO"
    •   Burn infection
    •   Endocarditis
    •   Pneumonia (CF)
    •   Sepsis (nosocomial)
    •   External otitis
    •   UTI (nosocomial)
    •   Drug use
    •   Osteomyelitis
  • Hot tub folliculitis
  • Corneal infections
  • Aminoglycosides
  • Penicillin
Bacteroides fragilis 
  • Normal gut flora
  • Septicemia
  • Peritonitis
  • Abdominal abscesses
  • Wound infections
  • Metronidazole
Enterobacter 
  • UTI
-
Respiratory
Haemophilus influenzae 
  • "EMOP"
    •   Epiglottitis
    •   Meningitis (pediatric)
    •   Otitis media
    •   Pneumonia (adult)
  • Bronchitis
  • Ceftriaxone
  • Rifampin
Haemophilius ducreyi 
  • Chancroid (genital ulcers)
  • Azithromycin
Legionella pneumophila 
  • Legionnaire disease (atypical pneumonia)
  • Pontiac fever
  • Erythromycin
Bordatella pertussis 
  • Whooping cough
  • Erythromycin
Zoonotic
Yersinia enterocolitica 
  • Gastroenteritis
  • Fluoroquinolones
Yersinia pestis 
  • Bubonic plague
  • Pneumonic plague
  • Aminoglycosides
Brucella 
  • Undulant fever (Brucellosis)
  • Rifampin
  • Doxycycline
Francisella tularensis 
  • Tularemia (similar to plague)
  • Streptomycin
Pasteurella multocida 
  • Cellulitis/animal bite infection
  • Penicillin
Bartonella henselae 
  • Cat scratch fever
  • Bacillary angiomatosis
  • Azithromycin 
  • Doxycycline
Other
Gardnerella vaginalis (Gram-variable) 
  • Vaginosis
  • Metronidazole
 

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