ISSUE FOCUS 26 FEED & ADDITIVE MAGAZINE March 2026 The objective of the study was to compare the percentage reduction of different microorganisms achieved by both preservatives. The effect against the most common sector-relevant microorganisms was also evaluated, including Aspergillus, Clostridium, Escherichia coli, Salmonella, Pseudomonas, Rhizopus, and Fusarium. For the experimental design, two types of substrates, ground corn and compound feed, were contaminated with 106 CFU/g of these microorganisms. After product administration, microbial counts were performed at 24 hours and 7 days to assess microbial reduction. Results showed that in the case of bacteria, Alquermold Natural Plus achieved notably lower bacterial counts on day 7 compared with the other preservative for each bacterium tested, even starting from high initial contamination. Compared to control, reductions were: 99.91% for Clostridium, 99.8% for E. coli, 99.93% for Salmonella, and 98.88% for Pseudomonas. 0 10000 20000 30000 40000 50000 60000 E. coli Salmonella Pseudomonas Clostridium CFU of different bacteria per gram of highly contaminated corn, after 7 days Alquermold Natural Plus Traditional preservative Figure 1. CFU per gram of corn highly contaminated with different bacteria. Results shown 7 days after contamination. 0 50000 100000 150000 200000 250000 300000 Aspergillus Fusarium Rhizopus CFU of different fungi per gram of highly contaminated corn, after 7 days Alquermold Natural Plus Traditional preservative Figure 2. CFU per gram of corn highly contaminated with different fungi. Results shown 7 days after contamination. Photo: tuaindeed | Shutterstock
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