Researchers Identified New Mechanism of Eimeria Infection
A study details how parasite proteins hijack host cells, revealing a potential target for preventing coccidiosis in poultry.
Updated on Sept. 29, 2026 in Life Sciences
Scientists have discovered a molecular interaction between the parasite protein EaMIC3 and the host protein EpCAM that drives Eimeria acervulina infection. This research-stage finding identifies a specific pathway the parasite uses to survive inside the host.
Why it matters
Understanding this interaction reveals how Eimeria acervulina inhibits apoptosis, or programmed cell death, in host cells to sustain infection. This mechanism provides a new target for the prevention and control of coccidiosis, a parasitic disease that impacts poultry production worldwide.
Researchers achieved a maximum oocyst reduction rate of 67.86% in chicks by administering pooled EaMIC3 and EpCAM antisera. This effect occurs because EaMIC3 binds to the extracellular domain of EpCAM, identified as EpEX, which stabilizes the EGFR/Akt/mTOR signaling pathway.
The details
The parasite protein EaMIC3 uses three microneme adhesive repeat regions, or structural motifs that facilitate binding, to attach to the EpCAM protein on the host cell surface. By binding to EpEX, the protein prevents the host cell from undergoing apoptosis, thereby extending the window for the parasite to replicate. Knockdown experiments, which reduce the expression of the target gene, confirmed that lower EpCAM levels lead to decreased sporozoite infection rates.
Timeline
September 29, 2026: Article publication.
The Tech Race
The study follows a pattern set by the development of sub-unit vaccines for protozoan diseases, shifting the focus from broad-spectrum drugs to specific molecular interventions. By targeting the interaction between EaMIC3 and EpCAM, researchers are attempting to move beyond traditional coccidiostats that often face resistance.
This development is currently in the research stage and does not yet affect commercial poultry management or veterinary practices. Future efforts to translate these findings into functional immunotherapies will require large-scale clinical trials and regulatory approval for use in livestock.
The takeaway
This discovery validates the role of the EpCAM pathway in parasite survival and provides a baseline for future vaccine development. Researchers and stakeholders should monitor upcoming studies for clinical validation of these antisera in field-rearing conditions.
Further reading
For more on the latest research in agricultural biology, explore the Life Sciences section.
Source note: This article includes information reported by Nature.
