Antimicrobial activity (mm inhibition zones diameter) of extracts of Ulmus pumila against 12 methicillin-resistant Staphylococcus aureus (MRSA) and 1 standard MRSA.
Strains
Zone of inhibition (mm)
Ulmus pumila (mg)
Ampicillina
Oxacillinb
0.25
0.5
1
10 μg
1 μg
S. aureus (ATCC33591)
10
12
14
10
ND
Clinical isolates
S. aureus (OMS 1)
11
13
16
12
9
S. aureus (OMS 2)
ND
9
14
11
ND
S. aureus (OMS 3)
9
11
15
11
ND
S. aureus (OMS 4)
10
14
16
11
ND
S. aureus (OMS 5)
10
12
14
11
ND
S. aureus (OMS 6)
11
15
17
10
ND
S. aureus (OMS 7)
ND
10
14
8
ND
S. aureus (OMS 8)
9
13
15
10
ND
S. aureus (OMS 9)
9
12
14
10
ND
S. aureus (OMS 10)
12
15
18
17
ND
S. aureus (OMS 11)
11
14
17
11
ND
S. aureus (OMS 12)
13
16
19
11
ND
ND: no detected activity at this concentration; C: chloroform extract; B: n-butanol extract; M: methanol extract; A: aqueous extract. Ampicillin resistance ≤28 mm. Oxacillin resistance ≤10 mm.
