Gram positive bacteria: Difference between revisions

Line 5: Line 5:
##Coagulase Negative:  
##Coagulase Negative:  
###[[Staph epidermidis]]
###[[Staph epidermidis]]
####Most common cause of catheter-related bloodstream infections
####Most common cause of catheter-related bacteremia
####Most common skin contaminant found in blood cultures
####Most common skin contaminant found in blood cultures
####[[S. saprophyticus]]: [[UTI]]s in women
###[[S. saprophyticus]]: [[UTI]]s in women
####[[S. lugdunensis]]: [[endocarditis]], [[meningitis]], and [[Skin and Soft Tissue Infections]]  
###[[S. lugdunensis]]: [[endocarditis]], [[meningitis]], and [[Skin and Soft Tissue Infections]]  
####[[S. haemolyticus]]: [[endocarditis]], [[meningitis]]  
###[[S. haemolyticus]]: [[endocarditis]], [[meningitis]]  
#Pairs/chains ([[Strep Species]])
#Pairs/chains ([[Strep Species]])
##catalase -
##catalase -

Revision as of 05:52, 22 April 2014

Cocci

  1. Clusters (Staph Species)
    1. Coagulase Positive: Staph aureus
      1. Always consider a blood culture positive for Staphylococcus aureus to be true bacteremia (and not a contaminant) due to the danger of delaying treatment[1]
    2. Coagulase Negative:
      1. Staph epidermidis
        1. Most common cause of catheter-related bacteremia
        2. Most common skin contaminant found in blood cultures
      2. S. saprophyticus: UTIs in women
      3. S. lugdunensis: endocarditis, meningitis, and Skin and Soft Tissue Infections
      4. S. haemolyticus: endocarditis, meningitis
  2. Pairs/chains (Strep Species)
    1. catalase -

Rods (Bacilli)

Organism
Cult Morphology

Listeria monocytogenes

Small

Aero
tumbling
Diphtheroids
Small Anaero
pallisades
Actinomyces
Small Anaero
Branching
Propionibac
Small Anaero
clumps/pleo
Lactobacillus
Variable Both
may chain
Clostridium
Large Anaero
Spores
Bacillus Large Aero Spores

Clinical Identification Chart

Gram-Positive Classification.png

Table Overview

See Also

Source

  1. Antibiotic Therapy for Positive Blood Cultures. Perez-Jorge EV, et al. Antimicrobe. http://www.antimicrobe.org/new/e38rev2.asp