Antibacterial Activity and Cytotoxic Effect of Pelargonium peltatum (Geranium) against Streptococcus mutans and Streptococcus sanguinis

Table 1

In vitro comparison of the antibacterial effect of the methanolic extracts of Pelargonium peltatum against strains of Streptococcus mutans and Streptococcus sanguinis.

Microorganism	Extract	Inhibition zone (mm)
		Mean	SD	Minimum	Maximum	value
Streptococcus mutans	Root	27.68	0.97	25.5	28.8	<0.01
	Leaf	25.86	0.54	24.6	26.3
	Stem	23.97	0.91	22.5	25
Streptococcus sanguinis	Root	30.8	0.55	30	32.1	<0.01
	Leaf	29.26	0.76	27.8	30.5
	Stem	27.53	1.13	26	29.4

Kruskal–Wallis test.