Abstract
In this study, methanolic extracts of six marine algae belong to Rhodophyceae (Corallina officinalis), Phaeophyceae (Cystoseira barbata, Dictyota dichotoma,Halopteris filicina, Cladostephus spongiosus f. verticillatus) and Chlorophyceae (Ulva rigida) from the North Aegean Sea (Turkey) were studied for their antibacterial activity against pathogenic microbes, 3 gram positive (Staphylococcus aureus, Micrococcus luteus and Enterococcus faecalis) and 3 Gram negative (Escherichia coli, Enterobacter aerogenes and E. coli O157:H7) in vitro. Extracts of all the test marine algae except C. officinalis showed inhibition against S. aureus. On the other hand, highest inhibiton activity among all the extratcs was shown to E . aerogenes by C . officinalis. The extract from C. barbata has shown broader activity spectrum against all the test organisms. Key words: Aegean sea, antib In this study, methanolic extracts of six marine algae belong to Rhodophyceae (Corallina officinalis), Phaeophyceae (Cystoseira barbata, Dictyota dichotoma,Halopteris filicina, Cladostephus spongiosus f. verticillatus) and Chlorophyceae (Ulva rigida) from the North Aegean Sea (Turkey) were studied for their antibacterial activity against pathogenic microbes, 3 gram positive (Staphylococcus aureus, Micrococcus luteus and Enterococcus faecalis) and 3 Gram negative (Escherichia coli, Enterobacter aerogenes and E. coli O157:H7) in vitro. Extracts of all the test marine algae except C. officinalis showed inhibition against S. aureus. On the other hand, highest inhibiton activity among all the extratcs was shown to E . aerogenes by C . officinalis. The extract from C. barbata has shown broader activity spectrum against all the test organisms. Key words: Aegean sea, antibacter In this study, methanolic extracts of six marine algae belong to Rhodophyceae (Corallina officinalis), Phaeophyceae (Cystoseira barbata, Dictyota dichotoma,Halopteris filicina, Cladostephus spongiosus f. verticillatus) and Chlorophyceae (Ulva rigida) from the North Aegean Sea (Turkey) were studied for their antibacterial activity against pathogenic microbes, 3 gram positive (Staphylococcus aureus, Micrococcus luteus and Enterococcus faecalis) and 3 Gram negative (Escherichia coli, Enterobacter aerogenes and E. coli O157:H7) in vitro. Extracts of all the test marine algae except C. officinalis showed inhibition against S. aureus. On the other hand, highest inhibiton activity among all the extratcs was shown to E . aerogenes by C . officinalis. The extract from C. barbata has shown broader activity spectrum against all the test organisms. Key words: Aegean sea, antibacterial activity, Corallina officinalis, marine algae. ial activity, Corallina officinalis, marine algae. acterial activity, Corallina officinalis, marine algae.
Highlights
Many substances obtained from marine algae such as alginate, carrragenean and agar as phycocolliods have been used for decades in medicine and pharmacy (Taskin et al, 2001)
Highest inhibiton activity was shown in E. aerogenes (34.00 ± 1.00 mm) by C. officinalis and it was followed with E. coli and E. faecalis (Figures 2 and 3)
The growth of food-borne pathogen E. coli O157:H7 was inhibited by only the extracts of C. spongiosus f. verticillatus with moderate and of C. barbata with the strong inhibition level (22.33 ± 0.57)
Summary
Many substances obtained from marine algae such as alginate, carrragenean and agar as phycocolliods have been used for decades in medicine and pharmacy (Taskin et al, 2001). Some marine algae belonging to Phaeophyceae (Dictyopteris membranaceae, Cystoseira barbata, Cystoseira compressa, Cystoseira mediterranea, Halopteris scoparia, Dictyota dichotoma, Colpomenia sinuosa, Ectocarpus siliculosus, Padina pavonica, Dictyota linearis), Rhodophyceae (Jania rubens, Acanthophora najadiformis, Laurencia papillosa, Hypnea musciformis, Gracilaria gracilis, Ceramium rubrum) and Chlorophyceae (Enteromorpha linza, Ulva rigida) were studied. In this investigation, antibacterial activity of six marine algae belonging to Rhodophyceae (Corallina officinalis), Phaeophyceae
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