scholarly journals Antimicrobial activity of marine fungi isolated from the Son Tra peninsula, Da Nang, Vietnam

2018 ◽  
Vol 39 (4) ◽  
pp. 457-462
Author(s):  
Phan Thi Hoai Trinh ◽  
Ngo Thi Duy Ngoc ◽  
Vo Thi Dieu Trang ◽  
Le Quoc Phong ◽  
Phi Quyet Tien ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Marine Fungi ◽  
Ethyl Acetate Extract ◽  
Microbial Pathogens ◽  
Diffusion Method ◽  
Disc Diffusion Method ◽  
E Coli ◽  
Bioactive Natural Products ◽  
Marine Habitats ◽  
Fungal Isolates

Marine fungi have become an important source of bioactive natural products. The present study was concerned with the screening of antimicrobial activity from 73 fungal strains isolated from various marine habitats collected from five different localities at the Son Tra Peninsula, Da Nang, Vietnam. For the first step of screening, ethyl acetate extract of each fungal isolate was prepared and their antimicrobial activity against the human microbial pathogens was investigated using the disc diffusion method. The panel of human microbial pathogens used were Bacillus cereus ATCC 11778, Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 25923, Pseudomonas aeruginosa ATCC 27853, Listeria monocytogenes ATCC 19111, Streptococcus faecalis ATCC 19433 and Candida albicans ATCC 10231. Among 73 fungal isolates, 29 exhibited antimicrobial activity against at least two tested pathogens. The proportion of the fungal isolates having anti-microbial activity against B. cereus, S. faecalis, L. monocytogenes, S. aureus, E. coli, C. albicans and P. aeruginosa were 42, 33, 31, 22, 7, 5 and 3%, respectively. Further investigations to isolate and characterize the anti-microbial components in the extracts are needed.   Citation: Phan Thi Hoai Trinh, Ngo Thi Duy Ngoc, Vo Thi Dieu Trang, Le Quoc Phong, Phi Quyet Tien, Bui Minh Ly, Tran Thi Thanh Van, 2017. Antimicrobial activity of marine fungi isolated from the Son Tra peninsula, Da Nang, Vietnam. Tap chi Sinh hoc, 39(4): 457-462. DOI: 10.15625/0866-7160/v39n4.8889. *Corresponding author: [email protected] Received 20 November 2016, accepted 12 August 2017 

scholarly journals Isolation and screening marine fungi with antimicrobial activity from samples collected in Nha Trang bay, VietNam

2018 ◽  
Vol 16 (1) ◽  
pp. 181-187
Author(s):  
Phan Thi Hoai Trinh ◽  
Phi Quyet Tien ◽  
Ngo Thi Duy Ngoc ◽  
Bui Minh Ly ◽  
Tran Thi Thanh Van
Keyword(s):  
Antimicrobial Activity ◽  
Marine Fungi ◽  
Antimicrobial Properties ◽  
Biologically Active ◽  
Microbial Pathogens ◽  
Diffusion Method ◽  
Disc Diffusion Method ◽  
E Coli ◽  
Nha Trang Bay ◽  
Complex Ecosystem

The marine environment is an extremely complex ecosystem and contains a broad spectrum of fungal diversity. Marine fungi have been shown to be tremendous sources for new and biologically active secondary metabolites. The present study aims to isolate and screen antimicrobial properties of 100 fungus strains from different marine sources including seaweeds, soft corals, sponges and sediment collected at Nha Trang Bay, Vietnam. In preliminary experiments, the crude extracts of these fungal isolates with ethyl acetate were screened for their antimicrobial activity against the human microbial pathogens including Bacillus cereus ATCC 11778, Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 25923, Pseudomonas aeruginosa ATCC 27853, Listeria monocytogenes ATCC 19111, Streptococcus faecalis ATCC 19433 and Candida albicans ATCC 10231 by the disc diffusion method. Among the 100 isolates, 59 strains exhibited antimicrobial activity against at least two tested pathogens, that 57% against S. aureus, 50% against L. monocytogenes, 49% against B. cereus, 45% against S. faecalis, 7% against E. coli, 5% against C. albicans, and only 2% against P. aeruginosa. The present study has revealed the presence of high numbers of marine fungi from Nha Trang waters having antimicrobial properties and they need to be investigated further for natural bioactive products.

scholarly journals Antimicrobial and larvicidal potential of endophytic fungi isolated from Tragia involucrata Linn.

2016 ◽  
Vol 6 (01) ◽  
pp. 1494 ◽  
Author(s):  
Ananda Danagoudar ◽  
Chandrashekhar G. Joshi* ◽  
M.T. Nivya ◽  
H.M. Manjunath ◽  
Jagadeesha Poyya ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Ethyl Acetate ◽  
Larvicidal Activity ◽  
Endophytic Fungi ◽  
Ethyl Acetate Extract ◽  
Penicillium Citrinum ◽  
Diffusion Method ◽  
Disc Diffusion Method ◽  
The People ◽  
Therapeutic Compounds

Endophytic fungi are one of the untapped resources of therapeutic compounds for various diseases. The present study focused on the antimicrobial as well as larvicidal activity of ethyl acetate extract of endophytic fungi isolated from Tragia involucrata. The ethyl acetate extract of Penicillium citrinum CGJ-C1 (GenBank No.KT780618), Penicillium citrinum CGJ-C2 (KP739821), Cladosporium sp. (KP739822), and Cryptendoxyla hypophloia CGJ-D2 (KT780619) was subjected to antimicrobial activity against a panel of microorganisms by disc diffusion method, larvicidal activity against Culex quinquefasciatus. All the extracts showed significant antimicrobial activity against the tested organisms ranging from 8±0.32 to 13±2.11. The extent of activity was comparable to the standard drugs. The larvicidal potential of the endophytes was superior to T.involucrata extract. The larvicidal activity was found to be dose and time dependent with LC50 value ranging from 4.25- 158.06ppm after 24hrs of treatment. This is the first report on the bioactivity of the endophytes isolated from T.involucrata. Further studies on the bio-guided isolation of lead compound will benefit the people suffering from microbe’s related diseases.

scholarly journals Synthesis and Antimicrobial Activity of Piperine Analogues Containing 1,2,4-Triazole Ring

2019 ◽  
Vol 31 (5) ◽  
pp. 1077-1080
Author(s):  
Kottakki Naveen Kumar ◽  
Karteek Rao Amperayani ◽  
V. Ravi Sankar Ummdi ◽  
Uma Devi Parimi
Keyword(s):  
Antimicrobial Activity ◽  
Triazole Ring ◽  
Diffusion Method ◽  
Moderate Activity ◽  
Disc Diffusion ◽  
Disc Diffusion Method ◽  
Antibacterial Study ◽  
Gram Negative ◽  
E Coli ◽  
Micro Organisms

A series 1,2,4-triazole piperine analogues (TP1-TP6) were designed and synthesized. The structures were confirmed using 1H NMR and 13C NMR. Antibacterial study was done using Gram-positive (Staphylococcus aureus and Bacillus cereus) and Gram-negative micro-organisms (E. coli and Pseudomonas aeruginosa) by disc diffusion method. Compound containing chloro substitution (TP6) showed the highest effect, while compound TP1, TP3, TP4, TP5 showed the moderate activity.

scholarly journals MICROBIOLOGICAL ANALYSIS OF SURFACES IN A SURGICAL CENTER: IDENTIFICATION AND BACTERIAL ACTIVITY AGAINST ANTIBIOTICS AND DISINFECTANT

2017 ◽  
Vol 39 (3) ◽  
pp. 738
Author(s):  
Fabíola Dresch ◽  
Claudete Rempel ◽  
Mônica Jachetti Maciel
Keyword(s):  
Antimicrobial Activity ◽  
Microbial Contamination ◽  
Bacterial Activity ◽  
Diffusion Method ◽  
Coagulase Negative Staphylococcus ◽  
Microbiological Analysis ◽  
Disc Diffusion Method ◽  
Cross Sectional ◽  
E Coli ◽  
Resistant Strains

The objective was to identify the microbiota present on hospital rooms surfaces of a surgical center, to know the susceptibility of the bacteria to antimicrobials and to evaluate the bacterial activity against the disinfectant commonly used in the hospital routine. This is a cross-sectional, descriptive study with a quantitative approach. The samples were collected from surfaces in different environments of the surgical center including admission room, recovery room and operating rooms. The microorganisms were identified and after the isolation, the antimicrobial susceptibility test was performed by the disc-diffusion method. The antimicrobial activity of the disinfectant was evaluated by the quantitative suspension test. Twenty-four areas were analyzed, 15 (62.5%) presented microbial contamination, and 35 strains with a coagulase-negative Staphylococcus coagulase (69%) were isolated, followed by S. saprophyticus (23%), Acinetobacter sp. (6%) and E. coli (2%). Of these, 51% had resistance to at least one antibiotic, and Staphylococcus methicillin resistant strains were found. The tested disinfectant showed proven antimicrobial activity. The antimicrobial action of the disinfectant was proven, but the presence of microorganisms evidences the importance of hygienic care in order to avoid the recurrence of contamination after cleaning.

scholarly journals AKTIVITAS ANTIMIKROBA BAKTERI ASAM LAKTAT YANG DIISOLASI DARI MAKANAN TRADISIONAL FERMENTASI KHAS BATAK “NANIURA”

2019 ◽  
Vol 6 (1) ◽  
pp. 8
Author(s):  
Aloysius Aloysius ◽  
Anjurniza Ulfa ◽  
Anggita Kasih Fianti Situmorang ◽  
Harmileni Harmileni ◽  
Edy Fachrial
Keyword(s):  
Antimicrobial Activity ◽  
Pathogenic Bacteria ◽  
Inhibition Zone ◽  
Fermented Food ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Disc Diffusion Method ◽  
E Coli ◽  
Gram Staining ◽  
Potential Source

Lactic acid bacteria (LAB) could be isolated from various fermented food products. One potential source of LAB is traditional fermented food. The aim of the study was to isolate and investigate antimicrobial activity of LAB isolated from traditional Batak food, “naniura”. The LAB isolates were characterized by Gram staining, fermentation type and catalase test. The investigation of antimicrobial activity of LAB against pathogenic bacteria were conducted using disc diffusion method. The results showed that 6 isolates of BAL were successfully isolated namely BN1, BN2, BN3, BN4, BN5 and BN6 had characteristics of Gram positive, rod shaped and catalase negative. All selected isolate have heterofermentation type. Four isolates (BN1, BN2, BN5 and BN6) were able to inhibit S. aureus, E. coli and S. typhi with inhibition zone diameters ranging from 6,9 to 12,3 cm. Based on the result, it was concluded that LAB isolated from naniura has potential as a source of probiotics.

scholarly journals Phytochemical screening and antimicrobial activity of extracts of Cassia alata L. leaves and seeds

2019 ◽  
Vol 51 (3) ◽  
pp. 378-383
Author(s):  
P. T. Q. Le
Keyword(s):  
Antimicrobial Activity ◽  
Inhibitory Concentration ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Phytochemical Screening ◽  
Disc Diffusion Method ◽  
Total Polyphenol ◽  
E Coli ◽  
Cassia Alata ◽  
Paper Disc

The aim of the study is to determine the presence of some bioactive compounds in Cassia alata L. leaves and seeds extracts such as tannins, saponins, anthraquinones and flavonoids. Total polyphenol contents (TPC) of leaves and seeds extracts are 59.211 mg GAE/g DW and 1.816 mg GAE/g DW, respectively, while their antioxidant capacities (AC) are 8.14 μmol Fe/g DW and 2.75 μmol Fe/g DW, respectively. The antimicrobial activity is determined by the paper disc diffusion method combined with the minimum inhibitory concentration (MIC). Leaves extract inhibits S. aureus and E. coli at MIC of 400 mg/mL; S. enteritidis and B. subtilis at MIC of 800 mg/mL. Besides, seeds extract also inhibits S. aureus at MIC of 200 mg/mL; E. coli, S. enteritidis and B. subtilis at MIC of 400 mg/mL. However, leaves and seeds extracts of C. alata do not show any inhibitions on the growth of A. niger. Keywords: Antibacterial activity, Antioxidant, Cassia alata L., Extract, MIC.

scholarly journals Evaluation of the Antibacterial Activity of Pleurotus spp. Cultivated on Different Agricultural Wastes in Chiro, Ethiopia

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Getachew Gashaw ◽  
Amare Fassil ◽  
Fuad Redi
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Antibacterial Agents ◽  
Salmonella Typhi ◽  
Agricultural Wastes ◽  
Diffusion Method ◽  
Wheat Grain ◽  
Disc Diffusion Method ◽  
E Coli ◽  
Methanolic Extracts

In the present study, mushrooms, Pleurotus ostreatus and Pleurotus florida, were cultivated on different agricultural wastes namely coffee straw (CS), pea straw (PS), Sorghum Grain Residue (SGR), and Wheat Grain (WG) for the evaluation of antibacterial activity. Antimicrobial activity evaluation was carried out against human pathogenic microorganisms, namely, Escherichia coli, Bacillus subtilis, Streptococcus faecalis, Pseudomonas aeruginosa, and Salmonella typhi by using the disc diffusion method. Methanolic extracts of P. ostreatus cultivated on a Sorghum grain residue substrate were recorded for the highest antibacterial activity against E. coli (19.8 mm) and P. aeruginosa (16.4 mm), and methanolic extracts of P. florida cultivated on a wheat grain substrate were recorded for the highest antibacterial activity against E. coli (18.6 mm) and S. faecalis (14.8 mm). Therefore, results suggested that P. ostreatus and P. florida cultivated on the coffee straw and Sorghum grain substrate were found with the highest antimicrobial activity in comparison to other substrates. The results supported that the methanolic extracts of P. ostreatus and P. florida might indeed be potential sources of antibacterial agents.

scholarly journals Antimicrobial Activity of Some Medicinal Plants from East and Central Part of Nepal

2014 ◽  
Vol 2 (1) ◽  
pp. 88-92 ◽  
Author(s):  
Bimala Subba ◽  
Prakash Basnet
Keyword(s):  
Antimicrobial Activity ◽  
Ethanolic Extract ◽  
Antimicrobial Activities ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Proteus Vulgaris ◽  
Disc Diffusion Method ◽  
E Coli ◽  
Ethanolic Extracts ◽  
Inhibitory Activities

To evaluate the antimicrobial activities of extract of eleven plants were examined against four common bacterials. The ethanolic extracts of various plants such as  Cissus repens, Hedyotis scandens, Jatropha curcas, Morus alba, Inula cappa, Equisetum ramosissimum, Osyris wightiana, Alternantheria sessilis and Hibiscus lampas  investigated individually for antimicrobial activity by disc diffusion method. These were investigated against selected species of Staphylococcus aureus, Escherichia coli, Proteus vulgaris and Klebsiella pneumoniae to find the inhibitory activities of the microbes. The ethanolic extract of C. repens showed considerably high activity against P. vulgaris, E. coli and S. aureus than other extracts.DOI: http://dx.doi.org/10.3126/ijasbt.v2i1.9697Int J Appl Sci Biotechnol, Vol. 2(1): 88-92

scholarly journals ANTIBACTERIAL ACTIVITY OF EARTHWORMS’ COELOMIC FLUID

2015 ◽  
Vol 2 (2) ◽  
pp. 143-145
Author(s):  
Kathireswari P
Keyword(s):  
Antimicrobial Activity ◽  
Diffusion Method ◽  
Coelomic Fluid ◽  
Bacterial Strains ◽  
Zone Of Inhibition ◽  
Disc Diffusion Method ◽  
Bioactive Natural Products ◽  
Research Activities ◽  
Agar Disc ◽  
Potential Antimicrobial Activity

This study was carried out with an objective to investigate the antibacterial potentials of earthworm coelomic fluid. The aim of the study is to assess the antimicrobial activity and to determine the zone of inhibition of coelomic fluid of some bacterial and strains. In the present study, the microbial activity wasevaluated for potential antimicrobial activity against medically important bacterial strains. The antimicrobial activity of coelomic fluid was determined using agar disc diffusion method. The results showed that the remarkable inhibition of the bacterial growth was shown against the tested organisms. Hence, these coelomicfluids can be used to discover bioactive natural products that may serve as leads in the development of new pharmaceuticals research activities

scholarly journals ANTIMICROBIAL AND ANTIOXIDANT EFFECT OF NATURAL EXTRACTS FROM LEAVES, ROOT, STEM AND FLOWERS OF BACCHARIS LATIFOLIA FROM ECUADOR

2020 ◽  
pp. 78-84
Author(s):  
FAVIAN BAYAS-MOREJON ◽  
ANGELICA TIGRE ◽  
RIVELINO RAMON ◽  
DANILO YANEZ
Keyword(s):  
Antimicrobial Activity ◽  
Antioxidant Activity ◽  
Potassium Phosphate ◽  
Natural Antioxidants ◽  
Butylated Hydroxytoluene ◽  
Penicillin G ◽  
Diffusion Method ◽  
E Coli ◽  
Antibacterial And Antioxidant Activity

Objective: The increase in chronic and degenerative diseases and the use of synthetic antioxidants such as (butylated hydroxyanisole (BHA) or butylated hydroxytoluene (BHT)) are being restricted because they can be considered carcinogenic. Therefore, there is a growing interest in the search for natural antioxidants, especially from plants, due to their content in different bioactive compounds, such as antioxidants and antimicrobials. To evaluate the antibacterial and antioxidant activity of Baccharislatifolia extracts. Methods: For the determination of the antimicrobial activity of extracts of leaves, root, stem and flowers of Baccharislatifolia (Bl), the disk plate diffusion method was used, the strains of Listeria, Salmonella and E. coli were studied; antibiotics Penicillin G and Ciprofloxacin were the controls. For the antioxidant activity, a solution of H2O2 (Abs at 230 nm) was prepared in Potassium Phosphate Monobasic-Sodium Hydroxide buffer. Results: The antimicrobial activity against Listeria and Salmonella, showed that the extracts of leaves and flowers were more effective with inhibition zones>15 mm and>20 mm respectively. In front of E. coli, the extracts of flowers and stem were the best with zones>7.0 mm. Antibiotics studied inhibited the development of Listeria and Salmonella. However, E. coli isolates were resistant. In the antioxidant activity, the flower extract of Bl in 60 mg/ml presents a higher effect with 47.25%. Conclusion: Bl extracts from leaves and flowers were more efficient both in their antimicrobial and antioxidant capacity.

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