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Table 2 Comparison of culture media for enumeration of oral streptococci

From: The usefulness of biotyping in the determination of selected pathogenicity determinants in Streptococcus mutans

  HLR-S BA SMM TYCSB P
Control - - - -  
Mixed strainsg ++ +++ + +++  
Dental plaqueh + +++ - +++  
Carious focii + ++ + ++  
S. mutans a +++ +++ - +++ 0.027j
S. sanguis b - +++ + ++ 0.031k
S. aureus c - +++ ++ +++ 0.025l
S. pyogenes d - ++ - + 0.017ł
H. influeznae e - - - -  
S. pneumoniae f - +++ - - 0.006m
  1. HLR-S: the modified medium of Ritz; BA: bacitracin agar; TYCSB: trypticase-yeast extract-cysteine sucrose-bacitracin agar.
  2. - no growth of bacteria.
  3. + 3 × 102 CFU/ml.
  4. ++ 2 × 103 CFU/ml.
  5. +++ > 3 × 104 CFU/ml.
  6. areference strain ATCC 700610.
  7. b, d, e, fclinical strains.
  8. creference strain ATCC 259232.
  9. gContains: S. mutans, S. sanguis, S. aureus, S. pyogens, S. pneumonia, H. influenzae in phosphate buffered saline (0.5 McFarland each).
  10. hAveraged from 20 samples.
  11. iAveraged from 20 samples.
  12. jBy the parametric Student-t test for independent samples.
  13. kBy the parametric Student-t test for independent samples.
  14. lBy the nonparametric Mann–Whitney U test for independent samples.
  15. łBy the parametric Student-t test for independent samples.
  16. m By the parametric Student-t test for independent samples.