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Synergistic antibacterial potential of salvinia auriculata (Butterfly Fern) and ludwigia perennis (Perennial Water Primrose) leaf methanolic extract against staphylococcu aureus and escherichia coli Bacquian, Megan Cate G., Baluyot, Ashley Rubiel S., Cenidoza, Daphne Ashlie C., Delantar, Patricia Kaye P., German, Samantha Ysabel G. 6

By: Bacquian, Megan Cate G., Baluyot, Ashley Rubiel S., Cenidoza, Daphne Ashlie C., Delantar, Patricia Kaye P., German, Samantha Ysabel G. 4 0 16, [, ] | [, ] |

Contributor(s): 5 6 [] |

Language: Unknown language code Summary language: Unknown language code Original language: Unknown language code Series: ; 4544446Edition: Description: 102 pagesContent type: text Media type: unmediated Carrier type: volumeISBN: ISSN: 2Other title: 6 []Uniform titles: | | Related works: 1 40 6 []Subject(s): -- 2 -- 0 -- -- | -- 2 -- 0 -- 6 -- | 2 0 -- | -- -- 20 -- | | -- -- -- -- 20 -- | -- -- -- 20 -- --Genre/Form: -- 2 -- Additional physical formats: DDC classification: | LOC classification: | | 2Other classification:

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Action note: In: Summary: ABSTRACT: Antimicrobial drug resistance is a major global challenge, with rising costs for finding effective drugs and a declining rate of new drug discoveries. This study aims to evaluate the synergistic antibacterial potential of Salvinia auriculata and Ludwigia perennis methanolic extracts alongside positive controls, Psidium guajava and Ocimum gratissimum, against Staphylococcus aureus and Escherichia coli. Minimum inhibitory concentration (MIC) (from concentrations, 400mg/ml - 0.195mg/ml), minimum bactericidal concentration (MBC), and disc diffusion assays were utilized to determine the antibacterial activities of individual and combined plant extracts. The MIC values for individual extracts against E. coli and S. aureus were 12.5 and 6.25 mg/ml (S. auriculata), and 6.25 mg/ml and 300mg/ml (L. perennis) whilst combined extracts, SL 1:3 and 3:1 had the lowest MIC against E. coli (0.781 mg/ml) and SL 3:1 against S. aureus (0.390625 mg/ml). This showed a highly significant difference in S. auriculata (p = 0.003) and the combined S. auriculata and L. perennis (p = 0.001) compared to the positive control. MBC results indicated bactericidal activity for most extracts and combinations against E. coli but only moderate efficacy against S. aureus. The combined plant extracts of S. auriculata and L. perennis demonstrated superior inhibitory activity compared to individual extracts, especially against E. coli, with mean inhibition zones of 10± 0.4 mm to 9.6 ± 1.5 mm for SL 3:1 and 1:3 ratio, respectively. It revealed significantly different zones of inhibition, with most ratios having a p-value < 0.05. Synergistic effects were observed in SL 1:1, 1:3, and 3:1, (FICi = 0.375 to 0.188) against E. coli, indicating potential for enhanced antibacterial activity. The synergism of S. auriculata and L. perennis is of great value as natural antibacterial agents and the study underscores the importance of exploring plant extract combinations to combat antimicrobial resistance. Other editions:

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Item type	Current location	Home library	Collection	Call number	Status	Date due	Barcode	Item holds
Book	PLM	PLM Filipiniana Section	Filipiniana-Thesis	QH581 B33 2024 (Browse shelf)	Available		FT8425

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Undergraduate Thesis: (BS Biology major in Medical Biology) - Pamantasan ng Lungsod ng Maynila, 2024 56

ABSTRACT: Antimicrobial drug resistance is a major global challenge, with rising costs for finding effective drugs and a declining rate of new drug discoveries. This study aims to evaluate the synergistic antibacterial potential of Salvinia auriculata and Ludwigia perennis methanolic extracts alongside positive controls, Psidium guajava and Ocimum gratissimum, against Staphylococcus aureus and Escherichia coli. Minimum inhibitory concentration (MIC) (from concentrations, 400mg/ml - 0.195mg/ml), minimum bactericidal concentration (MBC), and disc diffusion assays were utilized to determine the antibacterial activities of individual and combined plant extracts. The MIC values for individual extracts against E. coli and S. aureus were 12.5 and 6.25 mg/ml (S. auriculata), and 6.25 mg/ml and 300mg/ml (L. perennis) whilst combined extracts, SL 1:3 and 3:1 had the lowest MIC against E. coli (0.781 mg/ml) and SL 3:1 against S. aureus (0.390625 mg/ml). This showed a highly significant difference in S. auriculata (p = 0.003) and the combined S. auriculata and L. perennis (p = 0.001) compared to the positive control. MBC results indicated bactericidal activity for most extracts and combinations against E. coli but only moderate efficacy against S. aureus. The combined plant extracts of S. auriculata and L. perennis demonstrated superior inhibitory activity compared to individual extracts, especially against E. coli, with mean inhibition zones of 10± 0.4 mm to 9.6 ± 1.5 mm for SL 3:1 and 1:3 ratio, respectively. It revealed significantly different zones of inhibition, with most ratios having a p-value < 0.05. Synergistic effects were observed in SL 1:1, 1:3, and 3:1, (FICi = 0.375 to 0.188) against E. coli, indicating potential for enhanced antibacterial activity. The synergism of S. auriculata and L. perennis is of great value as natural antibacterial agents and the study underscores the importance of exploring plant extract combinations to combat antimicrobial resistance.

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