• Orego-Stim helped to support broiler growth and FCR in an Eimeria challenge model.
  • Broilers fed Orego-Stim had lower lesion scores and fewer oocysts/g following Eimeria
  • Orego-Stim is a natural solution to support broilers challenged by Eimeria.
  • Eimeria as ubiquitous in the environment and there is no cross protection between Eimeria species.
  • Traditionally coccidiosis control has been via the use of chemicals, ionophores and vaccines.
  • The global cost of coccidiosis, including drug related treatment, is estimated to be $10.4 billion annually (Blake et al., 2020).
  • Orego-Stim is a high quality, plant based eubiotic, containing 100% natural oregano essential oil.

An independent trial was conducted by Tsinas and colleagues (2011), in Greece. A total of 375 day-old Cobb-500 chicks were randomly assigned in equal numbers to one of 5 groups, with 3 replicates per group. Broilers were reared from 0-35 days of age. Body weights were measured weekly.

  Treatment Group Challenge1
NC No treatment, unchallenged (Negative Control)
PC No treatment, challenged (Positive Control)
OS 300 Orego-Stim (300g/t) in feed
OS 600 Orego-Stim (600g/t) in feed
Sal. Salinomycin (500g/t) in feed

1On day 14 of age, each broiler in the challenged groups was inoculated orally with a 2ml dose of 1×105 sporulated oocysts of E. acervulina and E. maxima directly into the crop.


Figure 1. Average daily gain (g) and average feed conversion ratio (FCR) of broilers from 0-35 days of age. Differing letters within series indicate significant difference (p<0.05). (Adapted from Tsinas et al., 2011). Figure 2. Average mortality of broilers from 0-35 days of age. (Adapted from Tsinas et al., 2011).

Broilers supplemented with Orego-Stim at 300g/t or 600g/t had:

  • An average daily gain which was numerically better than the unchallenged control group and was not significantly different from the birds treated with Salinomycin.
  • An improved FCR compared to both the control and positive control broilers and a numerically better FCR than broilers treated with Salinomycin.
  • Reduced lesion scores compared to PC broilers and lesion scores that were not significantly different from broilers treated with Salinomycin.
  • Significantly lower oocysts/g faeces between 20-28 days of age, compared to PC broilers (p<0.05), following an Eimeria challenge at 14 days of age. This helps to supports development of natural immunity whilst minimising performance losses.


The results of the trial indicate that Orego-Stim supplementation can support broiler health and performance during Eimeria challenge in the absence of antibiotics.