Methods of Biotyping of Streptococcus mutans Species with the Routine Test as a Prognostic Value in Early Childhood Caries

Table 9

The average values of MIC, MIC range, and MIC₅₀ (mg/L) for selected antibiotics according to S. mutans biotypes set out in the arbitrary method.

	Biotypes from the arbitrary method
	I	II	III	IV
All strains
Amoxicillin
MIC, range	0.007–0.5	0.007–0.5	0.007–0.5	0.007–0.25
MIC50	0.05	0.05	0.05	0.05
MIC, mean	0.092	0.059	0.084	0.042
Cefazolin
MIC, range	0.02–1.5	0.02–1.5	0.02–1.5	0.03–1.5
MIC50	0.07	0.07	0.07	0.07
MIC, mean	0.153	0.152	0.158	0.169
Teicoplanin
MIC, range	0.1–1.5	0.1–1.5	0.1–1.5	0.1–1
MIC50	0.5	0.5	0.5	0.5
MIC, mean	0.73	0.717	0.698	0.606
Erythromycin
MIC, range	0.015–1	0.015–1	0.015–1	0.04–1
MIC50	0.07	0.07	0.07	0.07
MIC, mean	0.097	0.081	0.136	0.188
Noncavitated group
Amoxicillin
MIC, range	0.007–0.5	0.015–0.5	0.007–0.5	0.015–0.05
MIC50	0.05	0.05	0.05	0.05
MIC, mean	0.096	0.08	0.078	0.012
Cefazolin
MIC, range	0.02–1.5	0.02–0.2	0.02–1.5	0.03–0.1
MIC50	0.07	0.07	0.07	0.07
MIC, mean	0.153	0.15	0.153	0.15
Teicoplanin
MIC, range	0.1–1.5	0.1–1.5	0.1–1.5	0.1–1
MIC50	0.5	0.5	0.5	0.5
MIC, mean	0.734	0.744	0.726	0.7
Erythromycin
MIC, range	0.015–1	0.015–0.5	0.015–1	0.04–0.07
MIC50	0.07	0.07	0.07	0.07
MIC, mean	0.097	0.061	0.091	0.05
Cavitated group
Amoxicillin
MIC, range	0.015–0.5	0.007–0.5	0.007–0.5	0.007–0.25
MIC50	0.05	0.05	0.04	0.04
MIC, mean	0.077	0.039	0.099	0.052
Cefazolin
MIC, range	0.02–1.5	0.02–1.5	0.02–1.5	0.03–1.5
MIC50	0.07	0.07	0.08	0.08
MIC, mean	0.154	0.154	0.171	0.175
Teicoplanin
MIC, range	0.1–1.5	0.1–1.5	0.1–1.5	0.1–1
MIC50	0.5	0.5	0.5	0.35
MIC, mean	0.716	0.692	0.627	0.575
Erythromycin
MIC, range	0.015–1	0.015–1	0.015–1	0.04–1
MIC50	0.07	0.07	0.07	0.07
MIC, mean	0.098	0.099	0.252	0.233