Bacteriological, Toxicological and Mutagenic Evaluations of the Formulated Ointment of Knobweed (Hyptis capitata Jacq.) Leaf Extract against Methicillin-Resistant Staphylococcus aureus

10.17158/339 ◽  
2014 ◽  
Vol 18 (2) ◽  
Author(s):  
Judee N. Nogodula ◽  
Rose Ann S. Mancenido ◽  
Ivana Lee M. Miranda ◽  
Darlene S. Quiñon
Keyword(s):  
Staphylococcus Aureus ◽  
Clinical Isolate ◽  
Leaf Extract ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Multiple Drug ◽  
Zone Of Inhibition ◽  
Methicillin Resistant ◽  
Multiple Drug Resistant ◽  
Crude Leaf Extract ◽  
Observation Results

<p>The emergence of multiple drug resistant Methicillin-Resistant Staphylococcus aureus (MRSA) has become a global problem. Fortunately, many plants found from Mindanaon lumads have potential curative property for different ailments. Hence, the ethnopharmacologic practice of the knobweed (Hyptis capitata) was scientifically assessed for antibacterial activity, toxicity, mutagenicity and pharmacological screenings of crude leaf extract in formulation of ointment as treatment of MRSA infections. Acute Dermal Toxicity employed female albino rabbits for 14 days. Antibacterial screenings used Kirby Bauer, Minimum Inhibitory Concentration (MIC) and potency tests. Ames test used Salmonella typhimurium TA98. Pharmacological assay was limited to physical characteristics of ointment and sensitivity (patch) test using albino rabbits (24 to 72 hours of observation). Results revealed that leaf extract was not toxic and had promising antibacterial action with 19.22 mm (±0.82) zone of inhibition on MRSA ATCC 43300 and 17.41 mm ±0.77 on clinical isolate. It had similar potency with Vancomycin at 6.54ug. MIC established the reduction of cell viability at 0.0263g/mL without revertant colonies grown; hence, it was not mutagenic. Efficacy of ointment with a hydrophilic base exhibited 16.11 mm (±1.73) zone of inhibition on MRSA ATCC and 16.12 mm (± 2.08) for clinical isolate. Neither erythema nor edema was observed.</p>

scholarly journals Ceftaroline Desensitization Procedure in a Pregnant Patient With Multiple Drug Allergies

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
James L. Kuhlen ◽  
Kimberly G. Blumenthal ◽  
Caroline L. Sokol ◽  
Diana S. Balekian ◽  
Ana A. Weil ◽  
...  
Keyword(s):  
Cystic Fibrosis ◽  
Staphylococcus Aureus ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Skin Testing ◽  
Pregnant Patient ◽  
Cross Reactivity ◽  
Multiple Drug ◽  
Methicillin Resistant ◽  
The Cross ◽  
Staphylococcus Aureus Pneumonia

Abstract Validated skin testing is lacking for many drugs, including ceftaroline. The cross-reactivity between ceftaroline and other β-lactam antibiotics is unknown. We report a case of a pregnant patient with cystic fibrosis and multiple drug allergies who required ceftaroline for methicillin-resistant Staphylococcus aureus pneumonia and underwent an uncomplicated empiric desensitization procedure.

MRSA REMAINS A GREAT PRIORITY DUE TO THE TREMENDOUS MORTALITY --- A BIRD'S EYE VIEW

2021 ◽  
pp. 114-118
Author(s):  
Raghavendra Rao M. V ◽  
Mubasheer Ali ◽  
Yogendra Kumar Verma ◽  
Dilip Mathai ◽  
Tina Priscilla ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Drug Resistance ◽  
Chronic Infection ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Multiple Drug Resistance ◽  
Multiple Drug ◽  
High Dose ◽  
Benzyl Penicillin ◽  
Methicillin Resistant ◽  
Antimicrobial Sensitivity

Methicillin-resistant Staphylococcus aureus (MRSA) is difcult to treat with methicillin, amoxicillin, penicillin, oxacillin, and other commonly used antibiotics because of its resistance. Staphylococcus organisms rapidly develop drug resistance as many as 50% of the domiciliary and 80% of the hospital strains are now penicillin resistant. Staphylococcus aureus also show multiple drug resistance. Therefore, Staphylococcal isolates should always be tested for antimicrobial sensitivity and chronic infection should be treated by more than one drug. Before 1960,when methicillin, is the rst penicillin's-resistant penicillin's, was brought into use, about 1%of the strains of the Staphylococcus aureus were "methicillin resistant" and by 1970 in Britain their proportion has risen to about 5%.These strains are tolerant of, low therapeutic concentrations of methicillin, cloxacillin, benzyl penicillin and ampicillin.They do not destroy methicillin and cloxacillin, but most of them are penicillinase-producing as well as being "methicillin resistant" and therefore inactivate benzyl penicillin and ampicillin. Its resistance is uncertain since infections may be cured with a high dose of methicillin.

Cochlospermum regium (Schrank) pilger leaf extract inhibit methicillin-resistant Staphylococcus aureus biofilm formation

2020 ◽  
Vol 261 ◽  
pp. 113167
Author(s):  
Fernanda de Oliveira Galvão ◽  
Fabiana Gomes da Silva Dantas ◽  
Carolina Rangel de Lima Santos ◽  
Silvana Beutinger Marchioro ◽  
Claudia Andrea Lima Cardoso ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Biofilm Formation ◽  
Leaf Extract ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Methicillin Resistant

scholarly journals The Antimicrobial Activity of Pechuel-Loeschea leubnitziae Leaf Extract and its Effect on The Expression Level of Methicillin Resistant Staphylococcus Aureus and Candida albicans Virulence-Associated Genes

2022 ◽  
Author(s):  
Mariah Ndilimeke Muhongo ◽  
Mourine Kangogo ◽  
Christine Bii
Keyword(s):  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Candida Albicans ◽  
Leaf Extract ◽  
Target Genes ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Methanol Extract ◽  
Ethanol Extract ◽  
Expression Level ◽  
Methicillin Resistant

The complete halt in the synthesis of new effective antimicrobial compounds is a global concern. Pathogenic microorganisms' virulence mechanisms seem to have a significant impact on their pathogenesis. The purpose of this study was to examine the antimicrobial activity of the ethanol and methanol fractions of Pechuel-Loeschea leubnitziae leaf extract, as well as its effect on the expression level of virulence-associated genes.The extract's fractions were evaluated for antimicrobial activity against Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, Klebsiella pneumoniae (clinical), Methicillin-resistant Staphylococcus aureus, and Candida albicans ATCC 90029. The test organism's antibiogram pattern was determined. The extracts' attenuation effect on the target genes of the susceptible organisms was investigated employing relative quantification using RT-qPCR. The test organism's antibiogram pattern revealed that it was drug-resistant, intermediate, and sensitive. The extracts tested positive for antimicrobial activity against Methicillin-resistant Staphylococcus aureus and Candida albicans ATCC 90029, with zones of inhibition varying from 20.33 to 29 mm. The lowest recorded MIC value was 4.688 mg/ml, while the highest was 37.5 mg/ml. In contrast to the methanol extract, the ethanol extract had a cidal action at a lower dose. The ethanol extract's Sub-MIC (18.25 mg/ml) merely reduced the expression of the hly gene in MRSA. The MRSA virulence genes were not suppressed by the sub-MIC of methanol extract (18.25 mg/ml). Notably, the expression of als1, pbl1, and sap1 in Candida albicans ATCC 90029 was significantly attenuated when exposed to sub-MICs of ethanol extract (2,344 mg/ml) and methanol extract (9.375 mg/ml). Per the findings of this research, the leaves of P. leubnitziae could be a source of an effective antimicrobial agent in the therapy of MRSA/Candida-related disorders.

scholarly journals Antibacterial and Antibiofilm Activity of Mercaptophenol Functionalized-Gold Nanorods Against a Clinical Isolate of Methicillin-Resistant Staphylococcus Aureus

2021 ◽  
Author(s):  
Nahla O. Eltai ◽  
Nouf Mahmoud ◽  
Zain Z. Zakaria ◽  
Hana Abdelrahman ◽  
Ala-Eddin Al Moustafa ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Staphylococcus Aureus ◽  
Clinical Isolate ◽  
Gold Nanorods ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Antibiofilm Activity ◽  
Methicillin Resistant ◽  
Vis Spectroscopy ◽  
Sem Imaging ◽  
Surface Modified

Abstract Gold nanorods (AuNRs) were synthesized and surface functionalized with 4-mercaptophenol (4-MPH) ligand. The surface-functionalized AuNRs, 4-MPH-AuNRs, were characterized by UV-Vis spectroscopy, dynamic light scattering (DLS), transmission electron microscopy (TEM) imaging, zeta potential, and Fourier-Transformed Infrared (FTIR) spectroscopy. The antibacterial and antibiofilm activities of 4-MPH-AuNRs were evaluated against a clinical isolate of Methicillin-Resistant Staphylococcus aureus (MRSA). The results indicate that the surface-modified nanorods, 4-MPH-AuNRs, exhibit a bactericidal activity with a minimum inhibitory concentration (MIC) of ~6.25 \(\mu\)g/ml against a planktonic suspension of MRSA. Furthermore, 4-MPH-AuNRs resulted in 2-3 log-cycle reduction of MRSA biofilm viable count over a concentration range of 100-4.0 \(\mu\)g/ml. The bacterial uptake of surface-modified nanorods was investigated by inductively coupled plasma-optical emission spectroscopy (ICP-OES) and scanning electron microscopy (SEM) imaging; the results reveal that ~27% of the nanorods were internalized into the bacterial cells after 6 hrs of exposure. SEM imaging revealed a significant accumulation of the nanorods at the bacterial cell wall and a possible cellular internalization. Thus, 4-MPH-AuNRs can be considered a potential novel antibacterial agent, particularly against resistant MRSA strain biofilm.

Toxicological and Antimicrobial Evaluations of Formulated Ointment from Eskwater (Mikania cordata Asteraceae) Leaf Extract against Trichophyton mentagrophytes and Methicillin-Resistant Staphylococcus aureus

10.17158/334 ◽  
2014 ◽  
Vol 18 (2) ◽  
Author(s):  
Judee N. Nogodula ◽  
Lady Ron M. Ducut ◽  
Jelah Mae F. Edorot ◽  
Aizovelle T. Egagamao
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Leaf Extract ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Trichophyton Mentagrophytes ◽  
Positive Control ◽  
Albino Rats ◽  
Standard Drug ◽  
Methicillin Resistant ◽  
Significant Difference

<p>Eskwater (Mikania cordata) is a medicinal plant in treating wounds by B’laan tribe. It is a useful treatment in the emerging cases of difficult-totreat infections caused by Methicillin-Resistant Staphylococcus aureus and Trichophyton mentagrophytes. To validate such claims, this study was conducted to assess the toxicological and antimicrobial properties of eskwater leaf extract through the acute dermal toxicity, antibacterial activity, Minimum Inhibitory Concentration (MIC), potency test with the standard drug and mutagenicity assay. Toxicity level was attained using female albino rats with the dose of 1000 mg/kg (Sighting study) while 1000 and 2000 mg/kg for Main study. Kirby-Bauer Method was employed for antibacterial activity using Vancomycin and Terbinafine as positive controls. MIC was determined in two-fold serial dilution and Ames test was employed for mutagenic assay using Salmonella typhimurium TA98. Hydrophilic base with low, medium and high doses were incorporated, respectively for ointment formulation. Results showed that eskwater extract was not toxic based from OECD 404 guideline and had partially active action against MRSA ATCC 43300 (13.66 ± 0.5778) and showed no inhibition in fungal growth. MIC was effective at 0.05 g/ml against MRSA only. It exhibited comparable potency with Vancomycin at the concentration of 0.32 mg and lastly, no noticeable mutagenic property was established. One-Way ANOVA and Post Hoc Tukey’s multiple comparison tests were employed in the efficacy of ointment. A significant difference resulted among the formulated ointment and positive control indicating that the three doses of formulated ointment and positive control have different potential to induce inhibition on the growth of MRSA. Ointment evaluated on its physical characteristics appeared greenish brown, has pH 6, good spreadability and washes out easily.</p>

scholarly journals Environmental factors modulate biofilm formation by Staphylococcus aureus

2020 ◽  
Vol 103 (1) ◽  
pp. 003685041989865
Author(s):  
Ying Liu ◽  
Jiang Zhang ◽  
Yinduo Ji
Keyword(s):  
Staphylococcus Aureus ◽  
Environmental Factors ◽  
Biofilm Formation ◽  
Pathogenic Bacteria ◽  
Treatment Options ◽  
Multiple Drug ◽  
Chronic Infections ◽  
Methicillin Resistant ◽  
Multiple Drug Resistant ◽  
Human Infections

Biofilm formation on indwelling medical devices represents an exclusive evasion mechanism for many pathogenic bacteria to establish chronic infections. Staphylococcus aureus is one of the major bacterial pathogens that are able to induce both animal and human infections. The continued emergence of multiple drug-resistant S. aureus, especially methicillin-resistant S. aureus, is problematic due to limited treatment options. Biofilm formation by S. aureus complicates the treatment of methicillin-resistant S. aureus infections. Therefore, elucidating the mechanisms of biofilm formation in this pathogen is important for the development of alternative therapeutic strategies. Various environmental and genetic factors contribute to biofilm formation. In this review, we address the environmental factors and discuss how they affect biofilm formation by S. aureus.

scholarly journals Complete Genome Sequence of Staphylococcus aureus Strain JKD6159, a Unique Australian Clone of ST93-IV Community Methicillin-Resistant Staphylococcus aureus

2010 ◽  
Vol 192 (20) ◽  
pp. 5556-5557 ◽  
Author(s):  
Kyra Chua ◽  
Torsten Seemann ◽  
Paul F. Harrison ◽  
John K. Davies ◽  
Scott J. Coutts ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Clinical Isolate ◽  
Genome Sequence ◽  
Complete Genome Sequence ◽  
Complete Genome ◽  
Skin Infection ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Aureus Strain ◽  
Invasive Infection ◽  
Methicillin Resistant

ABSTRACT Community methicillin-resistant Staphylococcus aureus (cMRSA) is an emerging issue that has resulted in multiple worldwide epidemics. We report the first complete genome sequence of an ST93-MRSA-IV clinical isolate that caused severe invasive infection and a familial outbreak of skin infection. This isolate is a representative of the most common Australian clone of cMRSA that is more distantly related to the previously sequenced genomes of S. aureus.

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