The growth of M. smegmatis gradually increased from OD600nm = 0.1 to 0.3 during 72 h in
control condition. In the presence of Zingiber ‘Phlai Chomphu’, B. rotunda and K. parviflora
extracts, the final M. smegmatis growths decreased 0.15 OD600nm units when compared with
ethanol control. We observed strong inhibition on M. smegmatis growth in the presence of A.
galanga extract. Several studies showed that mycobacterium species can be strongly inhibited by
10-gingerol compound extracted from Z. officinale (Hiserodt et al., 1998; Newton et al., 2000).
In our study, Z. officinale did not inhibit M. smegmatis. This compound was probably be in low
concentration in our extract. However, Z. ‘Phlai Chomphu’, B. rotunda, K. parviflora, and A.
galanga showed an antimycobacterial activity suggesting the presence of 10-gingerol
compounds sufficient to inhibit M. smegmatis
The growth of M. smegmatis gradually increased from OD600nm = 0.1 to 0.3 during 72 h incontrol condition. In the presence of Zingiber ‘Phlai Chomphu’, B. rotunda and K. parvifloraextracts, the final M. smegmatis growths decreased 0.15 OD600nm units when compared withethanol control. We observed strong inhibition on M. smegmatis growth in the presence of A.galanga extract. Several studies showed that mycobacterium species can be strongly inhibited by10-gingerol compound extracted from Z. officinale (Hiserodt et al., 1998; Newton et al., 2000).In our study, Z. officinale did not inhibit M. smegmatis. This compound was probably be in lowconcentration in our extract. However, Z. ‘Phlai Chomphu’, B. rotunda, K. parviflora, and A.galanga showed an antimycobacterial activity suggesting the presence of 10-gingerolcompounds sufficient to inhibit M. smegmatis
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