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

number of bacterial strains of which the MIC’s were obtained for the plant extracts
using either the microtitre plate or the agar dilution assays.
The microtitre plate assay gave reproducible results when testing the MIC’s of the
medicinal plant extracts against a total of 21 bacterial strains of S. aureus (4 strains),
MRSA (4 strains), P. aeruginosa (3 strains), A. baumanii (5 strains)& K. pneumoniae
(5 strains) using the microtitre plate assay.
Antibacterial activity screening of plant extracts were initially performed against
bacterial strains of S. pyogenes [no. 6], E feacalis [no.’s 6 – 11] and P. mirabilis
[no.’s 6 – 15]. The results of these bacteria were inconsistent and not compatible
with the spectrophotometric method of analysis, therefore the agar dilution assay was
used for these bacteria.
In the agar dilution assay the MIC’s of the plant extracts were tested against 15
bacterial strains of S. pyogenes (5 strains), E. feacalis (5 strains) and P. mirabilis (5
strains) (Table 6).
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