Document Type
Article
Rights
Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence
Disciplines
Microbiology, Marine biology
Abstract
Brown Irish edible seaweeds, Himanthalia elongata, Laminaria sachharina and Laminaria digitata, were evaluated for the microbiota in raw and heat processed form. Raw seaweeds showed complete absence of aerobic mesophiles, halophiles, yeasts and molds. However, heating at 85 C for 15 min resulted in spore germination. Bacterial counts as high as 107 were observed for aerobic mesophiles and halophiles. Heating above 95 C for 15 min resulted in complete inactivation of surface microflora. Bacteria belonging to Bacillaceae, Paenibacillaceae, Moraxellaceae and Enterobacteriaceae family were identified by 16S rRNA sequencing. In vitro antimicrobial activity of the methanolic extracts of the seaweed on food pathogenic and food spoilage bacteria were also evaluated. The seaweeds in their raw state had almost 100% inhibition against Listeria monocytogenes; 98% and 93% inhibition was achieved against Pseudomonas aeruginosa by H. elongata and L. saccharina extracts, respectively. Heating the seaweeds resulted in the reduction of antimicrobial activity as compared to raw. The effect was more pronounced against Gram negative bacteria
DOI
https://doi.org/10.1111/j.1365-2621.2009.02149.x
Recommended Citation
Gupta, S. Rajauria, G. & Abu-Ghannam, N. (2010) Study of the Microbial Diversity and Antimicrobial Properties of Irish Edible Brown Seaweeds. International Journal of Food Science and Technology 45: 482-489 doi:10.1111/j.1365-2621.2009.02149.x
Funder
Irish government (Strand III)
Publication Details
Journal: International Journal of Food Science and Technology, 2010.
doi:10.1111/j.1365-2621.2009.02149.x