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Agriculture

Essential Oils Show Promise in Controlling Coccidiosis in Poultry Farming

Strategic Insights

— 1 min read

Coccidiosis is a major challenge in poultry farming due to the drug-resistance phenomena in Eimeria strains and the potential risk of accumulation of anticoccidial residues in poultry-derived products. Researchers at the University of Padova have been exploring alternative control strategies, and their latest study suggests that essential oils may hold the key. The study, published in BMC Veterinary Research, found that certain essential oils, such as thymol and carvacrol, exhibited significant efficacy against Eimeria spp. in vitro, with the potential for synergistic effects between these oils.

Key Takeaways:

  • The study evaluated the in vitro efficacy of thymol, carvacrol, cinnamic aldehyde, eugenol, and a commercial essential oil blend (Energy Poultry, EP) against Eimeria spp.
  • Thymol and carvacrol significantly disrupted oocyst integrity and inhibited sporulation at concentrations of 2%, with maximal degeneration rates of 96% and 90%, respectively, at 10%.
  • Cinnamic aldehyde reduced sporulation by 79%, while eugenol showed minimal efficacy.
  • The potential synergistic effect between carvacrol and cinnamic aldehyde in the EP blend resulted in a marked reduction in oocyst viability (~ 90%).
  • In vivo evaluation of thymol and EP supplementation in a native Italian egg-type chicken breed, the Black Livorno, showed a reduction in oocyst per gram (OPG) values from day 78 onward compared to the control group.
  • Growth performance (average daily gain and feed conversion ratio) was not affected, indicating no adverse effects of thymol and EP supplementation.
  • The study suggests that the in vivo efficacy of essential oils may be dose-dependent, influenced by infection pressure and host factors.

Statistics:

  • 96% degeneration rate of Eimeria spp. oocysts at 10% concentration of thymol
  • 90% degeneration rate of Eimeria spp. oocysts at 10% concentration of carvacrol
  • 79% reduction in sporulation by cinnamic aldehyde
  • 90% reduction in oocyst viability due to synergistic effect between carvacrol and cinnamic aldehyde
  • 4205: The issue number in Agriculture Week where the study was reported.

Sources:

  • In vitro and in vivo effectiveness of essential oils against coccidia in Black Livorno chickens. BMC Veterinary Research, 2025;21(1):465.
  • NewsRx. University of Padova Reports Findings in Poultry Farming (In vitro and in vivo effectiveness of essential oils against coccidia in Black Livorno chickens). Agriculture Week. July 31, 2025; p 4205.

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