• In the feedmill, formic acid is now classified as a bacterial decontaminating agent (including, but not limited to Salmonella) to improve feed hygiene (Feed Additive Register 2017/940).
  • Salkil helps control levels of potentially harmful bacteria that may be present in the feed or raw materials which can impair animal performance.


  • Salkil is part of Anpario’s Acid Based Eubiotics (ABE) range and is a concentrated blend of pure liquid formic and propionic acids on a unique mineral carrier delivery system; chosen to ensure maximum efficacy during feed manufacture and throughout the gastrointestinal tract (GIT).
  • This trial was conducted to assess the level of bacterial inhibition in feed.



An independent trial was conducted at Abbott Analytical, UK to test the antibacterial efficacy of Salkil using their standard protocol. Five inclusion rates of Salkil were assessed, 0 (control), 2, 4, 8 and 12 kg/t were added to a standard commercial layer mash, artificially contaminated with test organisms. Bacterial counts (cfu/g) were measured at 4, 24, 48 and 72 hours after application and incubated at 36°C ± 1°C. Full trial method is available upon request.


  • The inclusion of Salkil required for effective bacterial decontamination is related to the microbial load, therefore regular microanalysis of raw materials is recommended.
  • Salkil is effective in controlling bacterial activity in finished feed with a preservative action.
  • Salkil can help control levels of bacteria that negatively affect animal performance.



Minimum Salkil inclusion and time required to obtain for log 2 reduction (95% reduction).

Bacteria 4 hours 24 hours 48 hours 72 hours
Salmonella enteritidis N/A N/A N/A 12 kg/t
Enterobacter cloacae N/A 4 kg/t 4 kg/t 4 kg/t
Escherichia coli N/A 12 kg/t 8 kg/t 8 kg/t