converting website visitors - news, features, articles and disease information for the poultry industry

ThePoultrySite Quick Disease Guide

Use the above box to quickly switch to another disease

Coccidiosis, Ileorectal, E brunetti

Related Products:

Extracted From:
A Pocket Guide to
Poultry Health
Order me a copy
By Paul McMullin
© 2004
Click Here to
Order Your Copy


A relatively rare form of coccidiosis affecting chickens worldwide caused by Eimeria brunetti. Of moderate to high pathogenicity, it is found in the terminal ileum, caecum and rectum. Morbidity and mortality are variable.


  • Depression.
  • Ruffled feathers.
  • Closed eyes.
  • Inappetance.
  • Poor production.
  • Diarrhoea, blood in faeces.

Post-mortem lesions

  • Petechiae and thickening of the distal third or more of intestine, extending into caecal tonsils.
  • Severe necrotising enteritis.
  • Oocysts in caecum and rectum.


Signs, lesions, microscopic examination of scrapings. Differentiate from ulcerative enteritis, caecal coccidiosis.


Toltrazuril, Sulphonamides, Amprolium, Vitamins A and K in feed or water.


Coccidiostats in feed, vaccination by controlled exposure, hygiene. This species is not usually included in vaccines for broilers. There is good immunity to the same parasite in recovered birds.

Figure 16. Moderate Eimeria brunetti infection in the terminal ileum and rectum of a chicken. There is thickening of the intestinal mucosa and there are lines of haemorrhagic spots in the mucosa.

Our Sponsors


Seasonal Picks

Animal Welfare Science, Husbandry and Ethics: The Evolving Story of Our Relationship with Farm Animals