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Table 6 Selectivity index of bacterial strains tested against T. diversifolia and T. rotundifolia solvent extracts

From: A comprehensive study of the potential phytomedicinal use and toxicity of invasive Tithonia species in South Africa

Plant species

Extract

Selectivity index (SI)

Ec

Kp

Ef

SD

Pa

Sa

ST

T. diversifolia

EtOH

0.0033

0.0065

0.0571

0.0129

0.0032

0.0129

0.0065

MeOH

0.0032

0.0032

0.0032

0.0032

0.0016

0.0032

0.0133

DCM

0.0129

0.0267

0.0129

0.0129

0.0129

0.0064

0.0065

Acetone

0.0387

0.08

0.1714

0.0387

0.0387

0.0194

0.0387

Hot water

0.220

0.4436

0.110

0.220

0.220

1.8333

0.4435

T. rotundifolia

EtOH

1.719

3.553

1.719

0.861

0.861

7.614

0.861

MeOH

0.836

1.671

0.207

3.453

0.836

0.836

1.671

DCM

1.513

6.253

6.253

6.253

3.026

13.4*

6.253

Acetone

2.523

11.171*

26.067*

2.523

2.523

11.171*

11.171*

Hot water

84.100*

1.357

12.014*

1.357

0.673

2.713

84.100*

  1. EtOH ethanol, MeOH methanol, DCM dichloromethane, Ec Escherichia coli, Kp Klebsiella pneumonia, Ef Enterococcus faecalis, SD Salmonella Dublin, Pa Pseudomonas aeruginosa, Sa Staphylococcus aureus, ST Salmonella Typhimurium
  2. Values written in bold with asterisk are non-toxic extracts with a safe margin and good promising antibacterial agent, while those written in bold with no asterisk are extracts with a relatively safe margin
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BMC Complementary Medicine and Therapies

ISSN: 2662-7671

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