Staphylococcus saprophyticus

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Gram stain Culture

General information
- Taxonomy
  Family: Staphylococcaceae
  
  Natural habitats
  Isolated from skin and urine samples
  
  Clinical significance
  S. saprophyticus is commonly associated with urinary tract infections (UTIs), particularly in young, sexually active women.
  
  It is the second most common cause of uncomplicated UTIs.
  While it is generally less virulent than Staphylococcus aureus, it can cause cystitis and, in rare cases, pyelonephritis.
  It is usually sensitive to antibiotics like trimethoprim-sulfamethoxazole and nitrofurantoin, though resistance can occur.
  
  Viulence factors, adherence to uroepithelial cells, production of a hemagglutin, production of extracellular slime
Gram stain
- Gram positive cocci,
  
  0.6-1.4 µm
  
  that occur in irregular grape-like clusters and,
  
  less often, single and in pairs, tetrads, and in short chains.
Culture characteristics
- INFECTION: low numbers of colony-forming units (less than 105 cfu/ml) are often present
  
  Facultative anaerobic
  
  BA: can be intesely yellow at first isolation
  
  Large; entire, very glossy, smooth, opaque, butyrous, convex, non hemolytic; usually white but colonies can be yellow or orange
  
  McConkey: growth (not always)
  
  BBAØ: growth
Characteristics
References
- James Versalovic et al.(2011) Manual of Clinical Microbiology 10th Edition