Table 2.

Comparison of culture media for enumeration of oral streptococci

	HLR-S	BA	SMM	TYCSB	P
Control	-	-	-	-
Mixed strainsg	++	+++	+	+++
Dental plaqueh	+	+++	-	+++
Carious focii	+	++	+	++
S. mutansa	+++	+++	-	+++	0.027j
S. sanguisb	-	+++	+	++	0.031k
S. aureusc	-	+++	++	+++	0.025l
S. pyogenesd	-	++	-	+	0.017ł
H. influeznaee	-	-	-	-
S. pneumoniaef	-	+++	-	-	0.006m

HLR-S: the modified medium of Ritz; BA: bacitracin agar; TYCSB: trypticase-yeast extract-cysteine sucrose-bacitracin agar.

- no growth of bacteria.

+ 3 × 10² CFU/ml.

++ 2 × 10³ CFU/ml.

+++ > 3 × 10⁴ CFU/ml.

^areference strain ATCC 700610.

^{b, d, e, f}clinical strains.

^creference strain ATCC 259232.

^gContains: S. mutans, S. sanguis, S. aureus, S. pyogens, S. pneumonia, H. influenzae in phosphate buffered saline (0.5 McFarland each).

^hAveraged from 20 samples.

ⁱAveraged from 20 samples.

^jBy the parametric Student-t test for independent samples.

^kBy the parametric Student-t test for independent samples.

^lBy the nonparametric Mann–Whitney U test for independent samples.

^łBy the parametric Student-t test for independent samples.

^m By the parametric Student-t test for independent samples.