Bactericidal activity of Myrrh extracts and two dosage forms against standard bacterial strains and multidrug-resistant clinical isolates with GC/MS profiling

AMB Express

Table 1 Bactericidal activity of hexane extract and essential oil of Myrrh tested by surface viable count method on standard microorganisms

Test organism	Contact time (h)	Hexane extract (5%)	Essential oil (5%)
Test organism	Contact time (h)	Viable count, CFU/ml^a (% killing)
S. aureus (ATCC 6538)	0	5.0 × 10⁷	8.5 × 10⁷
	0.5	4.8 × 10⁷ (40.00)	6.8 × 10⁷ (20.00)
	2	3.0 × 10⁷ (40.00)	2.0 × 10¹ (> 99.999)
Ps. aeruginosa (ATCC 9027)	0	9.25 × 10⁷	5.0 × 10⁷
	0.5	1.83 × 10⁷ (98.03)	1.95 × 10⁶ (96.10)
	2	1.7 × 10³ (> 99.998)	2.0 × 10¹ (> 99.999)

^aAverage of three determinations carried out by surface viable count method at RT (24 °C)