an investigation into the antibacterial activities of medicinal plants ...

The different extracts of B. frutescens displayed inhibition of four [no.’s 1, 3, 4 & 7] of
the seven S. aureus strains. None of the eight bacterial strains of MRSA displayed
any inhibition with the extracts of B. frutescens (Table 7).
The extracts of B. frutescens displayed antibacterial activity against three [no.’s 3, 4
& 5] of the five P. aeruginosa bacterial strains respectively (Table 7).
Six [no.’s 1, 4, 6, 8, 10 & 11] A. baumanii strains were inhibited by the methanol
extract of B. frutescens while two [no.’s 1 & 4] and four [no.’s 1, 4, 6 & 8] bacterial
strains were inhibited by the aqueous and acetone extracts respectively. All eight of
the K. pneumoniae strains [no.’s 1 – 8] displayed inhibition with the methanol extract
of B. frutescens. The aqueous and acetone extracts of B. frutescens inhibited all the
K. pneumoniae strains except strain [no. 5] and strain [no. 2], respectively.
Leonotis leonurus extracts inhibited all the S. aureus strains except strain [no. 3]
(methanol extract) and strain [no. 5] (aqueous extract). All MRSA strains were
inhibited by the extracts of L. leonurus except strain [no. 4] (methanol extract) and
strain [no. 7] (acetone extract) (Table 7).
The methanol and acetone extracts of L. leonurus inhibited all five strains of P.
aeruginosa while the aqueous extract inhibited three bacterial strains [no.’s 2, 3 & 5].
All except two [no.’s 1 & 3] of the thirteen A. baumanii strains were inhibited by the
methanol extracts of L. leonurus. Nine A. baumanii strains [no.’s 2, 4 & 7 – 13] were
inhibited by the acetone extract and only four strains [no.’s 2 & 11 – 13] by the
aqueous extract of L. leonurus. The aqueous extracts of L. leonurus inhibited all
eight strains of K. pneumoniae. The methanol and acetone extracts of L. leonurus
inhibited all K. pneumoniae strains except strain [no. 5] (Table 7).
The M. major extracts displayed antibacterial activity against all the bacterial strains
of S. aureus [no.’s 1 – 7], MRSA [no.’s 1 – 8] and P. aeruginosa [no.’s 1 – 5] (Table
7). The methanol extracts of M. major inhibited all thirteen A. baumanii strains [no.’s
1 – 13]. The acetone extract of M. major inhibited all except two [no.’s 1 & 4] strains
and the aqueous extract inhibited all except four [no.’s 6, 7, 9 & 12] strains of A.
baumanii strains (Table 7). The extracts of M. major inhibited all except one [no. 1]
(aqueous extract) of the eight K. pneumoniae strains.
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