scholarly journals UJI EFEKTIVIAS ANTIBAKTERI SEDIAAN SABUN CAIR KOMBINASI EKSTRAK ETANOL DAUN JATI (Tectona grandis L.) DAN BUNGA PACAR AIR (Impantiens balsamina L.) TERHADAP BAKTERI Staphylococcus aureus

PHARMACON ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 622
Author(s):  
Sabine A. Nelwan ◽  
Paulina V.Y. Yamlean ◽  
Jainer Pasca Siampa
Keyword(s):  
Staphylococcus Aureus ◽  
Moisture Content ◽  
Tectona Grandis ◽  
Experimental Methods ◽  
National Standard ◽  
Diffusion Method ◽  
Liquid Soap ◽  
Antibacterial Drugs ◽  
Organoleptic Test ◽  
Quality Testing

ABSTRACTJati Leaves (Tectona grandis L.) and Rose balsam flower (Impantiens balsamina L.) contain flavonoid compounds, saponins and tannins that are antibacterial. This research was aimed to formulate liquid soap extracts of Jati leaves and Rose balsam flower ethanol and test the antibacterial drugs for the antibacterial liquid soap with a concentration of (6%:2%), (5%:3%), (4%:4%). (3%:5%) and (2%:6%) against Staphylococcus aureus bacteria. Experimental methods were permorfed for this research. For the formulation of this liquid soap, several experiments were conducted (e.g., organoleptic test, pH, high foam, moisture content, free alkaline content, and type weights). The effectiveness of antibacterial to s.aureus growth was tested by diffusion method. The results of liquid soap quality testing finally met all the requirements according to ISN (Indonesian National Standard). The results of the effectiveness of antibacterial liquid soap esxtract of the obtained Jati leaves and Rose balsam flower can inhibit the s.aureus bacteria, with a concentration of (5%:3%) and (2%:6%) which has the strongest inhibition with a diameter of 19,3 mm. Keywords: Jati Leaves, Rose Balsam, Liquid Soap, Antibacterial.  ABSTRAKDaun Jati (Tectona grandis L.) dan Bunga Pacar Air (Impantiens balsamina L.) memiliki kandungan senyawa flavonoid, saponin, dan tannin yang bersifat sebagai antibakteri. Penelitian ini bertujuan untuk memformulasikan sabun cair kombinasi ekstrak etanol daun Jati dan bunga Pacar Air serta menguji aktivitas antibakteri sediaan sabun cair dengan konsentrasi (6%:2%), (5%:3%), (4%:4%), (3%:5%), (2%:6%) terhadap pertumbuhan bakteri Staphylococcus aureus. Penelitian ini menggunakan metode eksperimental. Formulasi sediaan sabun cair kombinasi dilakukan pengujian organoleptic, pH, tinggi busa, kadar air, kadar alkali bebas, dan bobot jenis. Pengujian aktivitas antibakteri dilakukan dengan metode difusi. Hasil pengujian mutu sabun cair memenuhi standar yang ditetapkan SNI (Standar Nasional Indonesia). Hasil uji aktivitas antibakteri yang diperoleh dapat menghambat bakteri s.aureus dengan konsentrasi (5%:3%) dan (2%:6%) yang memiliki daya hambat terkuat dengan diameter 19,3 mm. Kata kunci: Daun Jati, Bunga Pacar Air, Sabun Cair, Antibakteri.

scholarly journals FORMULASI DAN UJI AKTIVITAS ANTIBAKTERI SABUN CAIR KOMBINASI EKSTRAK ETANOL DAUN JATI (Tectona grandis Linn.f.) DAN DAUN EKOR KUCING (Acalypha hispida burm.f.) TERHADAP BAKTERI Staphylococcus aureus

PHARMACON ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 558
Author(s):  
Nia Kartika Pareda ◽  
Hosea J. Edy ◽  
Julianri S. Lebang
Keyword(s):  
Staphylococcus Aureus ◽  
Specific Gravity ◽  
Moisture Content ◽  
Secondary Metabolite ◽  
Ethanol Extract ◽  
Tectona Grandis ◽  
Liquid Soap ◽  
Extract Concentration

ABSTRACTTeak leaves (Tectona grandisLinn. f.) and Ekor Kucing leaves (Acalypha hispida Brum. f.) are plants that contain secondary metabolite compounds that can inhibit  bacteria.  This  research  aimsisto  formulate  liquid  soap containethanol extract of Teak leaves (Tectona grandisLinn. f.) and Ekor Kucing leaves (Acalypha hispidaBrum. f.) than determined itseffectiveness against Stahpylococcus aureusbacteria. This research was conducted by  make a liquid soap with various extract concentration  1%:4%,  4%:1%,  2,5%:2,5%,  2%:3%,  and  3%:2%,  furthermore  the specification of soap was tested for organoleptic, pH, high foam, moisture content, free  alkaline  content  and  specific  gravity.  Antibacterial  effectiveness  against  the growth  of Staphylococcus  aureuswas  done  bydiffusion  method.  The  results  of study show thatliquid soap preparations meet the requirements in accordance with SNI. The results obtained from the antibacterial effectiveness test of the liquid soap combination of ethanol extract of Teak leaves and Ekor Kucing leaves can inhibit Staphylococcus  aureusbacteria  with  all  the  concentrations  were  in  the  strong category,  with  the concentration  of 2,5%: 2,5%  which  has  the  largest  diameter namely 17,67 mm.Keywords  :     Antibacterial, Liquid Soap, Teak, Ekor Kucing.ABSTRAK Daun Jati (Tectona grandis Linn.f.) dan Daun Ekor Kucing (Acalypha hispida Brum.f.) merupakan tanaman yang memiliki kandungan senyawa metabolit sekunder yang bersifat sebagai antibakteri. Penelitian ini bertujuan untuk memformulasikan sabun cair kombinasi ekstrak etanol daun Jati dan daun Ekor Kucing dan pengujian efektivitas sediaan terhadap bakteri Staphylococcus aureus. Penelitian ini dilakukan dengan membuat sabun cair dengan variasi konsentrasi ekstrak yaitu 1%:4%, 4%:1%, 2,5%:2,5%, 2%:3%, dan 3%:2%, selanjutnya sabun diuji spesifikasinya meliputi pengujian organoleptik, pH, tinggi busa, kadar air, kadar alkali bebas, dan bobot jenis. Pengujian efektivitas antibakteri terhadap pertumbuhan Staphylococcus aureus dilakukan dengan menggunakan metode difusi. Hasil pengujian mutu sediaan sabun cair memenuhi persyaratan sesuai dengan SNI. Hasil uji efektivitas antibakteri sabun cair kombinasi ekstrak etanol daun Jati dan daun Ekor Kucing yang diperoleh dapat menghambat bakteri Staphylococcus aureus dengan semua konsentrasinya termasuk dalam kategori kuat, dengan konsentrasi 2,5%:2,5% yang memiliki diameter paling besar yaitu 17,67 mm.Kata Kunci  : Antibakteri, Sabun Cair, Jati, Ekor Kucing.

scholarly journals UJI AKTIVITAS ANTIBAKTERI SEDIAAN SABUN CAIR EKSTRAK ETANOL DAUN CENGKEH (Syzygium aromaticum) TERHADAP BAKTERI Staphylococcus aureus

PHARMACON ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 767
Author(s):  
Evander Roliand Lomboan ◽  
Paulina V.Y. Yamlean ◽  
Elly J. Suoth
Keyword(s):  
Staphylococcus Aureus ◽  
Specific Gravity ◽  
Moisture Content ◽  
Foam Height ◽  
Antibacterial Properties ◽  
Ethanol Extract ◽  
Diffusion Method ◽  
Syzygium Aromaticum ◽  
Liquid Soap

ABSTRACT Clove leaf (Syzygium aromaticum) is a plant that contains eugenol, saponins, flavonoids and tannins which have antibacterial properties. This study aims to formulate the ethanol extract liquid soap of clove leaves and test the effectiveness of the preparation against Staphylococcus aureus bacteria. This research was conducted in a laboratory experiment to make liquid soap with extract concentrations of 4%, 7%, 9%, 12% and 15%, then the soap was tested for spesifications including organoleptic testing, pH, foam height, moisture content, free alkaline content, and specific gravity. Antibacterial effectiveness testing against the growth of Staphylococcus aureus was carried out using the diffusion method. Clove leaf ethanol extract (Syzygium aromaticum) can be formulated into liquid soap. The results of testing the quality of liquid soap preparations meet the requirements in accordance with SNI. The results obtained from the antibacterial effectiveness test of liquid soap ethanol extract of Clove leaves can inhibit Staphylococcus aureus bacteria with all concentrations in the strong category, with a concentration of 15% having the largest diameter of 17,33 mm. Keywords : Antibacterial, Liquid Soap, Syzygium aromaticum, Staphylococcus aureus ABSTRAK Daun Cengkeh (Syzygium aromaticum) merupakan tanaman yang memiliki kandungan eugenol, saponin, flavonoid dan tannin yang bersifat sebagai antibakteri. Penelitian ini bertujuan untuk memformulasi sabun cair ekstrak etanol daun Cengkeh dan pengujian efektivitas sediaan terhadap bakteri Stahpylococcus aureus. Penelitian ini dilakukan secara eksperimental laboratorium untuk membuat sabun cair dengan konsentrasi ekstrak yaitu 4%, 7%, 9%, 12%, dan 15%, selanjutnya sabun diuji spesifikasinya meliputi pengujian organoleptik, pH, tinggi busa, kadar air, kadar alkali bebas, dan bobot jenis. Pengujian efektivitas antibakteri terhadap pertumbuhan Staphylococcus aureus dilakukan dengan menggunakan metode difusi. Ekstrak etanol daun Cengkeh (Syzygium aromaticum) dapat diformulasikan menjadi sabun cair. Hasil pengujian mutu sediaan sabun cair memenuhi persyaratan sesuai dengan SNI. Hasil uji efektivitas antibakteri sabun cair ekstrak etanol daun Cengkeh yang diperoleh dapat menghambat bakteri Staphylococcus aureus dengan semua konsentrasinya termasuk dalam kategori kuat, dengan konsentrasi 15% yang memiliki diameter paling besar yaitu 17,33 mm. Kata Kunci: Antibakteri, Sabun Cair, Syzygium aromaticum , Staphylococcus aureus

scholarly journals FORMULASI SEDIAAN SABUN CAIR EKSTRAK ETANOL DAUN TURI (Sesbania grandiflora L.) DAN UJI ANTIJAMUR TERHADAP Candida albicans

PHARMACON ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 334
Author(s):  
Mariando N. Ering ◽  
Paulina V. Y. Yamlean ◽  
Irma Antasionasti
Keyword(s):  
Candida Albicans ◽  
Ethanol Extract ◽  
Experimental Methods ◽  
Diffusion Method ◽  
Liquid Soap ◽  
Sesbania Grandiflora ◽  
Weight Test ◽  
Rate Test ◽  
Anti Fungal ◽  
Fungus Growth

ABSTRACTThe leaves of Hummingbird (Sesbania grandiflora L.) contain flavonoid compounds, saponins and tannins that are antifungal. This research aims to formulate liquid soap extracts of Hummingbird leaf ethanol and test the effectiveness of the antifungal preparations of the liquid soap of Hummingbird leaf ethanol with a concentration of 4%, 6%, 8%, 10% and 12% of the fungus growth of Candida albicans. This research uses experimental methods. The formulation of this liquid soap of Hummingbird leaf ethanol is conducted organoleptic test, pH, high foam, moisture content, free alkaline content, and type weights. Testing the effectiveness of antifungal to Candida albicans growth is done by diffusion method. Liquid soap preparations of Hummingbird leaf ethanol extract meet the standards set by SNI for organoleptic testing, pH test, Foam High test, water content test, free alkali rate test, and type weight test. Based on the anti-fungal testing of the preparation of a liquid soap extract of Hummingbird leaf ethanol to the fungus Candida albicans obtained the results of all preparations have a resistance to fungi and strong categorized.Keywords:  Hummingbird leaves, Liquid soap, AntifungalABSTRAK Daun Turi (Sesbania grandiflora L.) memiliki kandungan senyawa flavonoid, saponin dan tannin yang bersifat sebagai antijamur. Penelitian ini bertujuan untuk memformulasikan sabun cair ekstrak etanol daun Turi dan menguji efektivitas antijamur sediaan sabun cair ekstrak etanol daun Turi dengan konsentrasi 4%, 6%, 8%, 10% dan 12% terhadap pertumbuhan jamur Candida albicans. Penelitian ini menggunakan metode eksperimental. Formulasi sediaan sabun cair ekstrak etanol daun Turi ini dilakukan pengujian organoleptik, pH, tinggi busa, kadar air, kadar alkali bebas, dan bobot jenis. Pengujian efektivitas antijamur terhadap pertumbuhan Candida albicans dilakukan dengan metode difusi. Sediaan sabun cair ekstrak etanol daun turi memenuhi standar yang ditetapkan SNI pada pengujian organoleptik, uji pH, uji tinggi busa, uji kadar air, uji kadar alkali bebas, dan uji bobot jenis. Berdasarkan pengujian antijamur sediaan sabun cair ekstrak etanol daun Turi terhadap jamur Candida albicans didapatkan hasil semua sediaan memiliki daya hambat terhadap jamur dan dikategorikan kuat.Kata Kunci: Daun Turi, Sabun Cair, Antijamur

scholarly journals FORMULASI SEDIAAN SABUN CAIR ANTIBAKTERI MINYAK ATSIRI DAUN KEMANGI (Ocimumamericanum L.) DAN UJI TERHADAP BAKTERI Staphylococcus epidermidis dan Staphylococcus aureus

2015 ◽  
Vol 1 (1) ◽  
pp. 1-8
Author(s):  
Febry Astuti Abu ◽  
Yusriadi Yusriadi ◽  
Muhammad Rinaldhi Tandah
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Essential Oil ◽  
Staphylococcus Epidermidis ◽  
Storage Period ◽  
Diffusion Method ◽  
Liquid Soap ◽  
Activity Data ◽  
Significant Difference ◽  
The Stability

Basil (Ocimum americanum L.) is a plant that has antibacterial activity against Staphylococcus aureus and Staphylococcus epidermidis that is a bacteria can cause infection. Basil contains essential oils that act as an antibacterial. This research aims to formulate the essential oil of basil leaves into a liquid soap, determine antibacterial activity against S.aureus and S.epidermidis bacteria with the agar diffusion method using wells and determine the stability of the preparation. Antibacterial activity data that gain was analyzed by one-way ANOVA with a level of trust 95% followed by Duncan test. The results of the research showed basil essential oil liquid soap preparation has antibacterial activity. The analysis results showed that there were significant differences in the concentration of 2%, 3%, 4%, and the Duncan test results showed no significant difference between the concentration of 4% with control (+). The results of the t-student analysis of liquid soap include viscosity, pH and dispersive capacity does not fill the parameters of stability during the storage period of 28 days

Antibacterial Activity of Thujaoccidentalis,ThujaorientalisandChamaecyparisobtusa

2017 ◽  
Vol 8 (03) ◽  
Author(s):  
Kyoung- Sun Seo ◽  
Seong Woo Jin ◽  
Seongkyu Choi ◽  
Kyeong Won Yun
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Antibacterial Agent ◽  
Methanol Extract ◽  
The Other ◽  
Diffusion Method ◽  
E Coli ◽  
Agar Diffusion ◽  
Agar Diffusion Method ◽  
Crude Methanol Extract

The antibacterial activity of three Cupressaceae plants (Thujaoccidentalis,ThujaorientalisandChamaecyparisobtusa) was tested against three bacteria using the agar diffusion method. The ether and ethylacetate fraction of crude methanol extract from the three plants showed potent antibacterial activity against the tested microorganisms. The result showed that Staphylococcus aureus revealed the most sensitivity among the tested bacteria. Thujaoccidentalisether fraction and Thujaorientalis hexane fraction exhibited the highest antibacterial activity against Staphylococcus aureus. E. coli was shown the highest MIC values compared to the other two tested bacteria, which indicates the lowest antibacterial activity against the bacterium. This study promises an interesting future for designing a potentially active antibacterial agent from the three Cupressaceae plants.

The In vitro Evaluation of the Antimicrobial Activity of Quercus robur L. Methanolic and Aqueous Leaves’ Extracts, from the Algerian High Plateaus Against some Uropathogenic Microbial Strains

2019 ◽  
Vol 18 (5) ◽  
pp. 262-274
Author(s):  
E. Benyagoub ◽  
N. Nabbou ◽  
S. Boukhalkhel ◽  
I. Dehini
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Candida Albicans ◽  
Enterococcus Faecalis ◽  
Fusidic Acid ◽  
Quercus Robur ◽  
Diffusion Method ◽  
Phytochemical Analysis ◽  
Microbial Strains

The medicinal value of the plants is due to their chemical components that bring a definite physiological action on the human body to prevent the diseases. In this work, we investigated the antimicrobial activity of leaves’ extracts of Quercus robur L., collected from the Algerian upper highlands, on ten bacterial strains and one fungal strain known to be pathogenic. First, we performed a qualitative phytochemical analysis, and second, antimicrobial activity tests performed by agar diffusion method (disc and well) with the determination of MIC by broth macro-dilution method. Given the results, it appears that obtained macerates of Quercus robur L. were rich in bioactive phytoconstituents such as alkaloids, anthraquinones, saponins, tannins, and other components. The yield of aqueous and methanolic macerates of leaves was 8.5 ± 1.41 and 22.4 ± 4.36%, respectively. The bacterial resistance was relatively important to several antibiotics, namely, ampicillin, amoxicillin + clavulanic acid for strains of Escherichia coli and Salmonella sp. However, Staphylococcus aureus strains were resistant to fusidic acid, penicillin, and oxacillin; while Enterococcus faecalis was resistant to fusidic acid, penicillin, oxacillin, and ticarcillin. The antibacterial activity of the macerates toward tested microbial strains showed that the aqueous and methanolic macerates of the leaves were proportional to the tested concentration and active not only against Gram-positive and Gram-negative bacteria but also on the fungal species Candida albicans. The estimated MIC for Escherichia coli, Enterococcus faecalis, and Staphylococcus aureus was in the order of 10 mg/mL, which seems more effective than toward Salmonella sp., Klebsiella pneumoniae, Pseudomonas aeruginosa, and Candida albicans which were in the order of 30 mg/mL. These preliminary results confirm that the part of the studied plant had a very good antimicrobial activity that was proportional to the serial concentrations of the tested extracts.

scholarly journals Predominance of PVL-negative community-associated methicillin-resistant Staphylococcus aureus sequence type 8 in newly diagnosed HIV-infected adults, Tanzania

2021 ◽  
Author(s):  
Joel Manyahi ◽  
Sabrina J. Moyo ◽  
Said Aboud ◽  
Nina Langeland ◽  
Bjørn Blomberg
Keyword(s):  
Staphylococcus Aureus ◽  
Hiv Infection ◽  
Diffusion Method ◽  
Molecular Characteristics ◽  
People Living With Hiv ◽  
Newly Diagnosed ◽  
Beta Lactam ◽  
Disk Diffusion Method ◽  
Methicillin Resistant ◽  
Inducible Clindamycin Resistance

AbstractDifficult-to-treat infections caused by methicillin-resistant Staphylococcus aureus (MRSA) are of concern in people living with HIV infection as they are more vulnerable to infection. We aimed to identify molecular characteristics of MRSA colonizing newly diagnosed HIV-infected adults in Tanzania. Individuals newly diagnosed with HIV infection were recruited in Dar es Salaam, Tanzania, from April 2017 to May 2018, as part of the randomized clinical trial CoTrimResist (ClinicalTrials.gov identifier: NCT03087890). Nasal/nasopharyngeal isolates of Staphylococcus aureus were susceptibility tested by disk diffusion method, and cefoxitin-resistant isolates were characterized by short-reads whole genome sequencing. Four percent (22/537) of patients carried MRSA in the nose/nasopharynx. MRSA isolates were frequently resistant towards gentamicin (95%), ciprofloxacin (91%), and erythromycin (82%) but less often towards trimethoprim-sulfamethoxazole (9%). Seventy-three percent had inducible clindamycin resistance. Erythromycin-resistant isolates harbored ermC (15/18) and LmrS (3/18) resistance genes. Ciprofloxacin resistance was mediated by mutations of the quinolone resistance-determining region (QRDR) sequence in the gyrA (S84L) and parC (S80Y) genes. All isolates belonged to the CC8 and ST8-SCCmecIV MRSA clone. Ninety-five percent of the MRSA isolates were spa-type t1476, and one exhibited spa-type t064. All isolates were negative for Panton-Valentine leucocidin (PVL) and arginine catabolic mobile element (ACME) type 1. All ST8-SCCmecIV-spa-t1476 MRSA clones from Tanzania were unrelated to the globally successful USA300 clone. Carriage of ST8 MRSA (non-USA300) was common among newly diagnosed HIV-infected adults in Tanzania. Frequent co-resistance to non-beta lactam antibiotics limits therapeutic options when infection occurs.

scholarly journals Nasopharyngeal Carriage of Methicillin-Resistant Staphylococcus aureus (MRSA) among Sickle Cell Disease (SCD) Children in the Pneumococcal Conjugate Vaccine Era

2021 ◽  
Vol 13 (1) ◽  
pp. 191-204
Author(s):  
Nicholas T. K. D. Dayie ◽  
Deborah N. K. Sekoh ◽  
Fleischer C. N. Kotey ◽  
Beverly Egyir ◽  
Patience B. Tetteh-Quarcoo ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Sickle Cell Disease ◽  
Conjugate Vaccine ◽  
Sickle Cell ◽  
Pneumococcal Conjugate Vaccine ◽  
Diffusion Method ◽  
Nasopharyngeal Carriage ◽  
Cell Disease ◽  
Coagulase Negative Staphylococci ◽  
Methicillin Resistant

The aim of this cross-sectional study was to investigate Staphylococcus aureus nasopharyngeal carriage epidemiology in relation to other nasopharyngeal bacterial colonizers among sickle cell disease (SCD) children about five years into pneumococcal conjugate vaccine 13 (PCV-13) introduction in Ghana. The study involved bacteriological culture of nasopharyngeal swabs obtained from 202 SCD children recruited from the Princess Marie Louise Children’s Hospital. S. aureus isolates were identified using standard methods and subjected to antimicrobial susceptibility testing using the Kirby-Bauer disc diffusion method. Cefoxitin-resistant S. aureus isolates were screened for carriage of the mecA, pvl, and tsst-1 genes using multiplex polymerase chain reaction. The carriage prevalence of S. aureus was 57.9% (n = 117), and that of methicillin-resistant S. aureus (MRSA) was 3.5% (n = 7). Carriage of the mecA, pvl, and tsst-1 genes were respectively demonstrated in 20.0% (n = 7), 85.7% (n = 30), and 11.4% (n = 4) of the cefoxitin-resistant S. aureus isolates. PCV-13 vaccination (OR = 0.356, p = 0.004) and colonization with coagulase-negative staphylococci (CoNS) (OR = 0.044, p < 0.0001) each protected against S. aureus carriage. However, none of these and other features of the participants emerged as a determinant of MRSA carriage. The following antimicrobial resistance rates were observed in MRSA compared to methicillin-sensitive S. aureus: clindamycin (28.6% vs. 4.3%), erythromycin (42.9% vs. 19.1%), tetracycline (100% vs. 42.6%), teicoplanin (14.3% vs. 2.6%), penicillin (100% vs. 99.1%), amoxiclav (28.6% vs. 3.5%), linezolid (14.3% vs. 0.0%), ciprofloxacin (42.9% vs. 13.9%), and gentamicin (42.9% vs. 13.0%). The proportion of S. aureus isolates that were multidrug resistant was 37.7% (n = 46). It is concluded that S. aureus was the predominant colonizer of the nasopharynx of the SCD children, warranting the continuous monitoring of this risk group for invasive S. aureus infections.

scholarly journals A Molecular Insight into the Synergistic Mechanism of Nigella sativa (Black Cumin) with β-Lactam Antibiotics against Clinical Isolates of Methicillin-Resistant Staphylococcus aureus

2021 ◽  
Vol 11 (7) ◽  
pp. 3206
Author(s):  
Lorina I. Badger-Emeka ◽  
Promise Madu Emeka ◽  
Hairul Islam M. Ibrahim
Keyword(s):  
Staphylococcus Aureus ◽  
Mechanism Of Action ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Nigella Sativa ◽  
Synergistic Effects ◽  
Diffusion Method ◽  
Methicillin Resistant ◽  
Cell Wall Disruption ◽  
Time Kill ◽  
Insight Into

Methicillin-resistant Staphylococcus aureus (MRSA) infection is detrimental to hospitalized patients. With diminishing choices of antibiotics and the worry about resistance to colistin in synergistic combined therapy, there are suggestions for the use of herbal derivatives. This investigation evaluated the synergistic effects of Nigella sativa (NS) in combination with beta-lactam (β-lactam) antibiotics on extreme drug-resistant (XDR) MRSA isolates. NS concentrations of 10, 7.5, 5.0, 2.5, 1.0, and 0.1 µg/mL, alone and in combination with β-lactam antibiotics, were used to determine the antimicrobial susceptibility of MRSA isolates by the well diffusion method. Time–kill assays were performed using a spectrophotometer, with time–kill curves plotted and synergism ascertained by the fractional inhibitory concentration (FIC). Scanning and transmission electron microscopy were used to gain insight into the mechanism of action of treated groups. Isolates were inhibited by the NS concentrations, with differences in the zones of inhibition being statistically insignificant at p < 0.05. There were statistically significant differences in the time–kill assay for the MRSA isolates. In addition, NS combined with augmentin showed better killing than oxacillin and cefuroxime. The mechanism of action shown by the SEM and TEM results revealed cell wall disruption, which probably created interference that led to bacterial lysis.

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