Staphylococcus lugdunensis

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Gram stain Culture

General information
- Taxonomy
  Family: Staphylococcaceae
  
  Natural habitats
  In humans they ranges from a harmless skin commensal to a life-threatening pathogen
  
  Clinical significance
  S. lugdunensis is frequently found on the lower extremities and the groin.
  
  They have a relatively low virulence and can cause infections in patients with lowered resistance, especially in immune compromised patients.
  
  CNS infections occur in implantation of foreign objects, such as intravenous catheters or bone prostheses.
  
  Is repeatedly CNS, in pure culture or in mixed culture isolated from the material, then this confirms the presence of an infection.
  
  The correct identification of CNS is necessary in order to get an idea of the pathogens in this group.
Gram stain
- Gram positive cocci,
  
  0.6-1.3 µm
  
  that occur in irregular grape-like clusters and,
  
  less often, single and in pairs, tetrads, and in short chains.
Culture characteristics
- Facultative anaerobic
  
  BA: medium to large; smooth, glossy, entire edge with slightly domed center; nonpigmented or cream to yellow-orange, may be β-hemolytic
  
  McConkey: growth
  
  BBAØ: growth
  
  Smell: after 48 they can have a characteristic sweet, hay-like odor
Characteristics
References
- James Versalovic et al.(2011) Manual of Clinical Microbiology 10th Edition