In vitro antibacterial activity and major bioactive components of Cinnamomum verum essential oils against cariogenic bacteria, Streptococcus mutans and Streptococcus sobrinus

AbstractStaphylococcus aureus and coagulase-negative staphylococci are among the major causes of mastitis in sheep. The main goal of this research was to determine the in vitro antibacterial activity of several essential oils (EOs, n 30), then five of them were chosen and tested alone and in blends against staphylococci isolates. Five bacteria were isolated from episodes of ovine mastitis (two S. aureus and three S. xylosus). Biochemical and molecular methods were employed to identify the isolates and disk diffusion method was performed to determine their antimicrobial-resistance profile. The relative percentage of the main constituents in the tested essential oils and their blends was detected by GC-EIMS analysis. Antibacterial and bactericidal effectiveness of essential oils and blends were evaluated through minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC). All of them showed sensitivity to the used antimicrobials. The EOs with the highest antibacterial activity were those belonging to the Lamiaceae family characterized by high concentrations of thymol, carvacrol and its precursor p-cymene, together with cinnamon EO, rich in cinnamaldehyde. In terms of both MIC and MBC values, the blend composed by Thymus capitatus EO 40%, Cinnamomum zeylanicum EO 20%, Thymus serpyllum EO 20% and Satureja montana EO 20% was found to be the most effective against all the isolates. Some essential oils appear to represent, at least in vitro, a valid tool against ovine mastitis pathogens. Some blends showed a remarkable effectiveness than the single oils, highlighting a synergistic effect in relation to the phytocomplex.

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Analisa Aktivitas Antibakteri Rebusan Daun Sirih Dengan Rebusan Daun Kemangi Terhadap Pertumbuhan Bakteri Streptococcus mutans

Hang Tuah Medical journal ◽

10.30649/htmj.v18i1.459 ◽

2020 ◽

Vol 18 (1) ◽

pp. 36

Author(s):

ENNY WILLIANTI ◽

THEODORA THEODORA ◽

WAHYUNI DYAH PARMASARI

Keyword(s):

Antibacterial Activity ◽

Essential Oils ◽

Streptococcus Mutans ◽

Observational Research ◽

Ocimum Sanctum ◽

Piper Betle ◽

Oral Flora ◽

Betel Leaf ◽

Growth Of Bacteria

ABSTRACT Background: Betel leaf contains essential oils consisting of bethelphenol, kavikol, sesquiterpenes, hydroxycavikol, cavibetol, estragol, eugenol and carvacrol. Essential oils are antibacterial due to the presence of phenol compounds and their derivatives that can denature the bacterial cell proteins. Basil leaves contain compounds from essential oils, namely 1,8-cineole, ß-bisabolene, and methyl eugenol. These three ingredients are soluble to ethanol and can cause damage to the cell membranes of the Streptococcus mutans bacteria, which are members of the normal oral flora but can turn into pathogens if the balance of normal flora is disturbed. The aim of this study was to determine the difference in the activity of the antibacterial of decoction betel leaf (piper betle L. ) with a decoction of basil leaves (ocimum sanctum) against growth of bacteria Streptococcus mutans (in vitro study).Method: this observational research with disk diffusion techniques. This study observed and measured the diameter of the inhibitory zone in MHA formed by decoction of betel leaf (piper betle L) and basil leaf (ocimum sanctum) in units of millimeters (mm). There were 2 groups with 16 replications.Results: the results of the description test showed that the antibacterial activity of the betel leaf decoction and the highest decoction of basil leaf was 17 mm and the lowest was 15 mm, but the average antibacterial value of betel leaf decoction (15,81) greater than the average value of antibacterial activity of basil leaf (15.75). This is because there are chemicals contained in betel leaf similar as contained in basil leaf, namely essential oils.Conclusion: there is no difference in the antibacterial activity of decoction betel leaf with decoction basil leaf against growth of bacteria Streptococcus mutans. Keywords: Betel leaf decoction, basil leaf decoction, Streptococcus mutans. Abstrak Latar Belakang: Daun sirih mengandung minyak atsiri yang terdiri dari bethelphenol, kavikol, seskuiterpen, hydroxycavikol,cavibetol, estragol, eugenol dan carvacrol. Minyak atsiri bersifat antibakteri karena adanya senyawa phenol dan turunannya yang dapat mendenaturasi protein sel bakteri. Daun kemangi mengandung senyawa dari minyak atsiri yaitu 1,8-cineole, ß-bisabolene, metyl eugenol. Ketiga bahan tersebut memiliki sifat larut terhadap etanol dan dapat menyebabkan kerusakan membran sel bakteri streptococcus mutans yang merupakan anggota flora normal rongga mulut tetapi dapat berubah menjadi patogen jika keseimbangan flora normal terganggu.Tujuan penelitian ini untuk mengetahui perbedaan aktivitas antibakteri rebusan daun sirih (piper betle L) dengan rebusan daun kemangi (ocimum sanctum) terhadap pertumbuhan bakteri Streptococcus mutans (penelitian in vitro).Metode: penelitian observasional ini dengan teknik difusi. Penelitian ini dilakukan dengan mengamati dan mengukur diameter zona hambat pada MHA yang dibentuk oleh rebusan daun sirih (piper betle L) dan daun kemangi (ocimum sanctum) dalam satuan milimeter (mm). Terdapat 2 kelompok dengan replikasi sebanyak 16.Hasil : Hasil uji deskripsi menunjukkan bahwa aktivitas antibakteri pada rebusan daun sirih maupun rebusan daun kemangi yang tertinggi sebesar 17 mm dan yang terendah 15 mm. Tetapi pada nilai rata-rata efektifitas antibakteri rebusan daun sirih (15,81) lebih besar daripada nilai rata-rata efektifitas antibakteri rebusan daun kemangi (15,75). Hal ini dikarenakan ada zat kimia yang terkandung dalam daun sirih mirip dengan yang terkandung dalam daun kemangi, yaitu minyak atsiri.Kesimpulan : tidak ada perbedaan aktivitas antibakteri rebusan daun sirih dengan rebusan daun kemangi terhadap pertumbuhan bakteri Streptococcus mutans. Kata kunci: rebusan daun sirih, rebusan daun kemangi, Streptococcus mutans.

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Anti-bacterial activity of three essential oils - An in vitro study

International Journal of Research in Pharmaceutical Sciences ◽

10.26452/ijrps.v10i2.380 ◽

2019 ◽

Vol 10 (2) ◽

pp. 1049-1053 ◽

Cited By ~ 1

Author(s):

Geetha RV ◽

John Rozar Raj B ◽

Lakshmi Thangavelu

Keyword(s):

Antibacterial Activity ◽

Essential Oils ◽

Streptococcus Mutans ◽

Bacterial Species ◽

In Vitro Study ◽

Oral Bacteria ◽

Zone Of Inhibition ◽

Thyme Oil ◽

Rosemary Oil

To conduct a study regarding the antibacterial activity of essential oils against bacteria causing Caries. Essential oils are distillates of the volatile compounds of a plant’s secondary metabolism and may act as photoprotective agents. Their curative effect has been known since antiquity. It is based on a variety of pharmacological properties which are specific for each plant species. The mouth contains a variety of oral bacteria, but only a few species of bacteria are believed to cause dental caries. Antibacterial activity of the three essential oils, Rosemary oil, Holy basil oil, Thyme oil was screened against Streptococcus mutans, using disc diffusion technique. The rosemary oil was more effective against Streptococcus mutans with a zone of inhibition of 52 mm diameter (at concentration 200 µl), Rosemary oil showed a zone of inhibition of 44 mm diameter and with thyme oil, the zone diameter was 30 mm. The results of this study showed that the essential oils at different concentrations exhibited antibacterial activity against the bacterial species tested.

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In vitro antibacterial activity of plant essential oils against Staphylococcus hyicus and Staphylococcus aureus, the causative agents of exudative epidermitis in pigs

Archives of Microbiology ◽

10.1007/s00203-018-1512-4 ◽

2018 ◽

Vol 200 (7) ◽

pp. 1001-1007 ◽

Cited By ~ 11

Author(s):

Katy Vaillancourt ◽

Geneviève LeBel ◽

Li Yi ◽

Daniel Grenier

Keyword(s):

Staphylococcus Aureus ◽

Antibacterial Activity ◽

Essential Oils ◽

Plant Essential Oils ◽

Causative Agents ◽

In Vitro Antibacterial Activity ◽

And Staphylococcus Aureus

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EVALUATION OF ANTIBACTERIAL ACTIVITY OF ESSENTIAL OIL OF CINNAMOMUM ZEYLANICUM, EUGENIA CARYOPHYLLATA, AND ROSMARINUS OFFICINALIS AGAINST STREPTOCOCCUS ORALIS

Asian Journal of Pharmaceutical and Clinical Research ◽

10.22159/ajpcr.2017.v10i5.17072 ◽

2017 ◽

Vol 10 (5) ◽

pp. 410 ◽

Cited By ~ 1

Author(s):

Samira Hsaine ◽

Reda Charof ◽

Khadija Ounine

Keyword(s):

Antibacterial Activity ◽

Essential Oil ◽

Essential Oils ◽

Rosmarinus Officinalis ◽

Diffusion Method ◽

Cinnamomum Zeylanicum ◽

Streptococcus Oralis ◽

In Vitro Antibacterial Activity ◽

Broth Dilution

Objective: Streptococcus oralis plays an important role in the biofilm formation of dental plaque and the occurrence of periodontal disease. Thepresent study was conducted to evaluate in vitro antibacterial activity of three essential oils, namely, Cinnamomum zeylanicum, Eugenia caryophyllata,and Rosmarinus officinalis against S. oralis.Methods: The antibacterial activity of essential oils was investigated by diffusion method using sterile discs (or aromatograms). The minimuminhibitory concentration (MIC) of essential oils showing important antibacterial activity was measured using the broth dilution method.Results: Evaluation of the antibacterial activity of three essential oils as determined by the aromatogram technique showed that the essential oilof R. officinalis had no effect on S. oralis, while the latter was extremely sensitive to the other two essential oils, but with a higher efficiency of theessential oil of C. zeylanicum (42 mm diameter) than E. caryophyllata (20 mm diameter). Similarly, the MIC and minimum bactericidal concentration(MBC) were higher for the essential oil of C. zeylanicum than the essential oil of E. caryophyllata. The MBC/MIC ratio is of the order of 2. The essentialoils studied therefore appear to exert bactericidal activity against S. oralis.Conclusion: The findings suggest that essential oils of C. zeylanicum and E. caryophyllata may be used as an alternative to synthetic antibiotics.Keywords: Essential oil, Cinnamomum zeylanicum, Eugenia caryophyllata, Rosmarinus officinalis, Antimicrobial activity, Streptococcus oralis.

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Plant essential oils against bacteria isolated from fish: an in vitro screening and in vivo efficacy of Lippia origanoides

Ciência Rural ◽

10.1590/0103-8478cr20190064 ◽

2019 ◽

Vol 49 (6) ◽

Author(s):

Guerino Bandeira Junior ◽

Carine de Freitas Souza ◽

Matheus Dellaméa Baldissera ◽

Sharine Nunes Descovi ◽

Bibiana Petri da Silveira ◽

...

Keyword(s):

Antibacterial Activity ◽

Essential Oils ◽

Bacterial Infections ◽

Cupressus Sempervirens ◽

Therapeutic Success ◽

Plant Essential Oils ◽

In Vitro Antibacterial Activity ◽

Fish Bacteria

ABSTRACT: The use of natural products, such as essential oils (EOs), is a potential novel approach to treat fish bacterial infections with a lower risk of developing resistance. There has been a number of studies reporting the activity of EOs as those obtained from the species Achyrocline satureioides, Aniba parviflora, Aniba rosaeodora, Anthemis nobilis, Conobea scoparioides, Cupressus sempervirens, Illicium verum, Lippia origanoides, and Melaleuca alternifolia against bacteria. However, there are few studies investigating the effect of these EOs against fish bacteria. Therefore, the aim of this study was to evaluate the in vitro antibacterial activity of EOs against the following fish bacteria, Aeromonas hydrophila, Citrobacter freundii, and Raoultella ornithinolytica. Additionally, the in vivo antibacterial activity of the EO L. origanoides was evaluated against experimentally induced A. hydrophila infection of silver catfish (Rhamdia quelen). The EO of L. origanoides was chosen as it showed the highest in vitro antibacterial activity, with minimum inhibitory concentrations ranging from 0.2 to 0.8 mg mL-1. This EO also presented a therapeutic success of 58.33%, on a 30 day A. hydrophila infection. Therefore, we suggested that the EO of L. origanoides may be a viable alternative as a treatment for A. hydrophila infection.

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