Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/31090
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: The microbial safety of seaweed as a feed component for black soldier fly (Hermetia illucens) larvae
Author(s): Swinscoe, Isobel
Oliver, David M
Ørnsrud, Robin
Quilliam, Richard S
Contact Email: richard.quilliam@stir.ac.uk
Keywords: BSF larvae
Food safety
Human pathogens
Listeria
Macroalgae
Sustainable food systems
Issue Date: Oct-2020
Date Deposited: 3-May-2020
Citation: Swinscoe I, Oliver DM, Ørnsrud R & Quilliam RS (2020) The microbial safety of seaweed as a feed component for black soldier fly (Hermetia illucens) larvae. Food Microbiology, 91, Art. No.: 103535. https://doi.org/10.1016/j.fm.2020.103535
Abstract: Farmed insects can offer an environmentally sustainable aquafeed or livestock feed ingredient. The value of black soldier fly (Hermetia illucens) (BSF) larvae however, could be improved by enrichment in omega-3 through the dietary inclusion of seaweed. However, the industry practice of drying seaweed at low temperatures to retain nutritional properties may benefit the survival of human pathogenic bacteria, particularly if the seaweed has been harvested from contaminated water. Here we have demonstrated that E. coli and E. coli O157:H7 died-off in seaweed dried at 50 °C, although both were detected in the dried powder following 72 h storage. V. parahaemolyticus fell below the level of detection in stored seaweed after drying at ≥ 50 °C, but L. monocytogenes remained detectable, and continued to grow in seaweed dried at ≤60 °C. Therefore, drying seaweed at low temperatures risks pathogen carry-over into insects destined for animal feed. BSF larvae reared on an artificially contaminated seaweed-supplemented diet also became contaminated by all four bacteria present in the supplement. Water quality at seaweed harvesting sites, seaweed desiccation, and insect rearing practices, represent critical points where development of regulatory standards could achieve targeted control of pathogenic hazards.
DOI Link: 10.1016/j.fm.2020.103535
Rights: This item has been embargoed for a period. During the embargo please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study. Accepted refereed manuscript of: Swinscoe I, Oliver DM, Ørnsrud R & Quilliam RS (2020) The microbial safety of seaweed as a feed component for black soldier fly (Hermetia illucens) larvae. Food Microbiology, 91, Art. No.: 103535. https://doi.org/10.1016/j.fm.2020.103535 © 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Licence URL(s): http://creativecommons.org/licenses/by-nc-nd/4.0/

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