Technical Information Livestock

A trial was conducted in collaboration with a UKAS accredited microbiology laboratory in the UK, to determine the antibacterial efficacy of oregano essential oil (OEO) against Salmonella dublin and Salmonella typhimurium using the zone of inhibition, disk diffusion technique.
The addition of Orego-Stim Liquid to milk for pre-weaning calves resulted in: An 21% increase in daily liveweight gain (Figure 1) An additional 20 kg of total liveweight gain throughout the study period (Figure 2) Potential for a higher throughput of calves This study demonstrated that Orego-Stim may be included in calf milk replacer on farm to support improved growth performance and overall farm profitability.
Support Lifetime Performance with Oregano Essential Oil
Support Lifetime Performance with Oregano Essential OilBy Ellie Burroughs, Ruminant Technical Product Manager – Anpario plcThe properties of natural oregano essential oil (OEO) are numerous and well-documented. Sources of the phytogenic derived specifically from the whole plant through steam distillation...
SUMMARY The transition period pre- and post-calving is a stressful time for the dairy cow. Natural plant extracts may help maintain antioxidant status and support immune function. In this study (Vizzotto et al., 2021) cows fed Orego-Stim had lower somatic cell counts and reduced levels of some oxidative stress biomarkers, leading to greater milk production.
Trial Summary - The Effect of Orego-Stim on the Faecal Microbiome of Dairy Cows


  • Calves offered Orego-Stim in their milk had a greater proportion of Actinobacteria in their gut. These bacteria have been previously reported to be associated with healthy calves.
  • These calves also had higher levels of Ruminococcus bacteria, which is associated with lower Cryptosporidia shedding.

  • When offered to calves, Orego-Stim Liquid helps to support and maintain gut health, as indicated by an increase in beneficial bacteria and decline in potentially harmful bacteria.

Trial Summary Orego-Stim® Supports Lamb Growth Performance & Feed Efficiency 
SUMMARY Optimal lamb growth performance and feed efficiency post-weaning can help to support producer profitability by reducing number of days to market, as well as reducing feed costs to reach target weights. Phytogenic feed additives, such as natural oregano essential...
Anpario Awarded UK Patent for Orego-Stim®, the Composition of Which Reduces Antimicrobial Resistance in Calves
Anpario have successfully been granted a UK patent for their leading phytogenic product Orego-Stim. The composition of which is effective in reducing antimicrobial resistance*.
Technical Tip Orego-Stim® Supports Ruminant Gut Health During Worm Challenge
WHAT ARE GASTROINTESTINAL NEMATODES (WORMS)? Gastrointestinal nematodes (GINs) are parasitic worms, some species of which spend part of their lifecycle within the stomach or intestines of sheep and cattle. In moderate climates, species such as the brown stomach worm (Ostertagia...
Case Study Orego-Stim® Powder Reduces Coccidia Oocyst Shedding in Weaned Lambs

Orego-Stim® Powder Reduces Coccidia Oocyst Shedding in Weaned Lambs 

Trial Summary - The Effect of Orego-Stim® on Antimicrobial Resistance in Calves
  • Orego-Stim® Liquid, when included in milk at 10ml per calf per day for 10 days, significantly reduced development of AMR in E. coli to 4th generation cephalosporins in the faeces of dairy calves.

Commercial Study Summary Orego-Stim® Supports Improved Growth Performance of Beef Cattle


  • Profitable beef production relies on achieving good growth rates and efficient feed conversion.
  • This study was undertaken to evaluate the effect of Orego-Stim Powder (OSP) on the growth performance of Aberdeen Angus cross beef cattle fed a forage-based ration.

  • The addition of OSP to feed improved growth rates, resulting in a return on investment of 2.5:1.

Trial Summary - Orego-Stim Improves Ewe Performance During Late Pregnancy and Early Lactation
Orego-Stim is known to benefit maternal energy balance and lactation performance and so was included in ewe concentrate rations to understand effects in ovines.
Trial Summary - The Effect of Orego-Stim® on Cryptosporidia in Calves

Cryptosporidia is the major cause of calf scour (57% of cases) in early life with significant cost to the dairy industry (£32 - £154/calf (Gunn, 1997)).

Orego-Stim Liquid, when included in milk at 10ml/calf/day for 10 days, significantly reduced Cryptosporidia shedding in dairy calves.

Trial Summary - Enhanced Growth of Calves Fed Orego-Stim®

Orego-Stim Liquid, when provided at a dose of 2 ml/calf/day, improved growth performance of dairy calves by 2 kg at day 56 (weaning) and 2.9 kg by 70 days of age

This could result in an additional 21 - 31 kg of milk in the first lactation, giving a ROI of 4.5 : 1.