{"id":10442,"date":"2021-03-14T20:06:07","date_gmt":"2021-03-14T19:06:07","guid":{"rendered":"https:\/\/serinnovation.it\/?p=10442"},"modified":"2022-12-13T11:05:55","modified_gmt":"2022-12-13T10:05:55","slug":"animals-silkworm-pupae-oil-antimicrobial-activity","status":"publish","type":"post","link":"https:\/\/serinnovation.it\/en\/animals-silkworm-pupae-oil-antimicrobial-activity\/","title":{"rendered":"From silkworm pupae, the production of oil with antimicrobial activity"},"content":{"rendered":"
Study published in the international journal \u201cAnimals\u201d,\u00a0particularly interesting for the feed industry.<\/strong><\/h5>\n

<\/p>\n

\u201cAnimals\u201d is a journal devoted entirely to animals, including zoology and veterinary sciences, published by MPD monthly; it is open-access and peer-reviewed.<\/p>\n

\n

Mechanical Processing of Hermetia illucens<\/em> Larvae and Bombyx mori<\/em> Pupae Produces Oils with Antimicrobial Activity<\/strong><\/span><\/h3>\n

SIMPLE SUMMARY<\/p>\n

Insect rearing and processing are widely studied to provide solutions to the increasing demand for proteins caused by a growing human population.
\nIt has been demonstrated that insect meal can be introduced into the feed ratio of livestock<\/strong> and its exploitation can limit the environmental impact of animal husbandry.
\nWhen their ecological footprint is analyzed, insects are considered \u201cbiorefineries\u201d able to generate multiple economic outputs for the food industry<\/strong>.
\nFat and antimicrobial peptides contained in the insect oil can represent important resources to treat animal diseases<\/strong>, e.g., allowing to reduce antibiotic overuse<\/strong>.<\/p>\n

In this paper we focused on two insects exploitable both for protein and oil production<\/strong>: the black soldier fly larvae (BSFL) and the domestic silkworm.
\nAs the diet regimen remarkably affects the fat composition of the insects, both BSFL and silkworm larvae were reared on plant-based diets. Silkworms were fed mulberry leaves, while BSFL were reared on a diet composed of leftover vegetables and fruit, in the perspective of their bioconversion and valorization.
\nThe best technique to maximize the oil extraction yield was defined for BSFL and applied to the silkworm pupae.
\nAn antimicrobial activity of the oil against some bacterial species was demonstrated<\/strong> in both insects and compared.<\/p>\n

ABSTRACT<\/p>\n

The aim of this work was to develop processing methods that safeguard the quality and antimicrobial properties of H. illucens<\/em> and B. mori<\/em> oils<\/strong>.
\nWe adopted a vegetable diet for both insects: leftover vegetables and fruit for H. illucens<\/em> and mulberry leaves for B. mori<\/em>. First, alternative techniques to obtain a good oil extraction yield from the dried biomass of H. illucens<\/em> larvae were tested. Traditional pressing resulted to be the best system to maximize the oil yield<\/strong> and it was successfully applied to B. mori<\/em> pupae.
\nOil quality resulted comparable to that obtained with other extraction methods described in the literature. In the case of B. mori<\/em> pupae, different treatments and preservation periods were investigated to evaluate their influence on the oil composition and quality<\/strong>. Interestingly, agar diffusion assays demonstrated the sensitivity of Gram-positive Bacillus subtilis<\/em> and Staphylococcus aureus<\/em> to H. illucens<\/em> and B. mori<\/em> derived oils, whereas the growth of Gram-negative Pseudomonas aeruginosa<\/em> and Escherichia coli<\/em> was not affected.<\/p>\n

This study confirms that fat and other active compounds of the oil extracted by hot pressing could represent effective antimicrobials against bacteria, a relevant result if we consider that they are by-products of the protein extraction process in the feed industry.<\/strong><\/p>\n

\n
Authors<\/h5>\n

Silvia Cappellozza<\/strong> (1), Alessio Saviane<\/strong> (1), Luca Tassoni<\/strong> (2), Daniele Naviglio<\/strong> (3), Daniela Lupi<\/strong> (4), Sara Savoldelli<\/strong> (4), Giulia Bianchi<\/strong> (5), Giovanna Cortellino<\/strong> (5), Paolo Bondioli<\/strong> (6), Liliana Folegatti<\/strong> (7), Morena Casartelli<\/strong> (8), Viviana Teresa Orlandi<\/strong> (9), Gianluca Tettamanti<\/strong> (9).<\/p>\n

(1) Council for Agricultural Research and Economics, Research Centre for Agriculture and Environment (CREA-AA) – Sericulture Laboratory of Padua – Italy
\n(2) Italian health authority and research organization for animal health and food safety, Padua – Italy
\n(3) Department of Chemical Sciences, University of Naples \u201cFederico II\u201d – Italy
\n(4) Department of Food, Environmental and Nutritional Sciences, University of Milan – Italy
\n(5) Council for Agricultural Research and Economics, Research Centre of Engineering and Agri-food Processing (CREA\u2010IT) – Milan, Italy
\n(6) Freelance Expert, Milano – Italy
\n(7) Innovhub, Laboratory of fat substances, derivatives and oil technologies\u00a0(Milano) – Italy
\n(8) Department of Biosciences, University of Milan – Italy
\n(9) Department of Biotechnology and Life Sciences, University of Insubria (Varese) – Italy
\n<\/em><\/p>\n

\n

> Online article<\/a><\/h4>\n

> Article | Download PDF<\/a><\/h4>\n

> Supplementary Material | Download PDF<\/a><\/h4>\n
\n

 <\/p>\n

\"\"<\/div><\/a><\/div><\/div><\/div>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

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