ISSUE FOCUS 28 FEED & ADDITIVE MAGAZINE April 2024 identify mouldy or wet products in a certain area. All senses can help with speedy identification, allowing processors to act accordingly. When sampling, it is recommended to wear sterilised gloves to prevent cross contamination. Plastic Ziploc bags help secure the material when taking samples of dust, raw materials, final products, or compound feed. And, as microbes can proliferate fast, it is important to get the samples to the lab as quickly as possible for the most accurate analysis. In addition to taking material samples, moist sponge swabs can be used to wipe surfaces that are identified as critical control points. They have a bigger surface than the normal cotton bud swabs, providing a bigger area to sample. Swabs can only identify the presence of bacteria, not the quantity, but offer a rapid way of alerting to a potential issue, so that immediate actions can be taken. TECHNICAL APPLICATION A big part of the three-pillar approach is to address the challenges faced by applying specialty formulated blends of organic acids. These carefully selected blends of buffered and non-buffered organic acids provide a strong reduction factor and allow for slower release of active ingredients over a period of time. Selko offers two specific product brands that are specially formulated to address various microbial risks. Fylax, in the case of mould inhibition and Fysal when it comes to enterobacteria, like Salmonella, control. Whether it be treating grains or complete feeds, Fylax and Fysal have demonstrated proven efficacy for decades. Figures 1 and 2 provide examples of how effective these products are against microbial risks: 1,000,000 100,000 10,000 1,000 100 10 1 Cfu/g Corn untreated Corn + 0.5 kg/mT Fylax Grain Corn + 1.0 kg/mT Fylax Grain t=0 t=5 days t=7 days t=14 days Moulds Control Enterobacteriaceae (cfu/g) Fysal® liquid 0.4% 40000 35000 30000 25000 20000 15000 10000 5000 0 Fysal® liquid 0.6% Fysal® liquid 0.8% Figure 2. Enterobacteriaceae load in layer feed after 72 hours of inoculation Figure 1. Fylax Grain shows up-to 4-log reduction* in mould counts over 14-day period. *100 cfu/g is the minimum detection limit for analysis of mould counts. All the 14-day results showed <100 cfu/g.
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