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Archaea extract: a new heat stable micro-ingredient to improve disease resistance in aquaculture Duncan Sutherland and Tray Ghidossi, TwentyGreen Group Disease burden and antibiotics dependence remain a major challenge for the aquaculture industry. Probiotics and microbe derived extracts are useful strategies to improve survival rates and FCR in aquaculture, although these products are typically not heat-stable and therefore difficult to integrate in commercial granulate and extruded feeds.
How conventional probiotics work The idea of integrating microbes into granulated feed is aimed to help create a natural barrier against pathogens preventing cell invasion and disease onset. Probiotics and microbe-based extracts are a much more preferred alternative to antibiotic treatments. Antibiotics overuse in agriculture has been linked to the emergence of unprecedented levels of antibiotics resistance worldwide. Conventional probiotics incompatible with industrial processes Unfortunately, routine industrial heat processes destroy microbe-based feed additives diminishing the potency of such products significantly. Hatchery feeds are typically produced using granulation, microencapsulation, spray-drying and extrusion processes. Commercially available microbe-based products are insufficiently heat-stable to endure heat-exposure. It is cumbersome to apply probiotics and microbial extract type products separately – e.g. by top-coating etc. High level resistance to heat Pioneer research performed at the Institute of Technology in Lausanne (EPFL) in Switzerland, identified archaea as a high potential microingredient for the animal feed industry.
Figure 1. Archaea cell wall structure versus bacterial cell wall structure.
Aquafeed: Advances in Processing & Formulation Vol 11 Issue 3 2019
