Coccidiosis, Mid Intestinal, (E. ne ...

Coccidiosis, Mid Intestinal, (E. necatrix) in Laying Hens

Layer pullets suffering outbreaks at 7-20 weeks of age may suffer mortality, loss of uniformity and decreased egg-laying potential.

Infections with mid-intestinal species of coccidia is a major predisposing factor for Clostridium sp. infection. Colonization of small intestine by Eimeria sp. may lead to intestinal mucosal damage which mat then, in turn, provide natural substrates (plasma proteins) required for Clostridium sp. proliferation.

E.necatrix along with E.tenella are the most pathogenic of the chicken coccidia. Droppings of infected birds often contain blood, fluid and mucus. Some birds may show ruffled feathers.

Causing Agents
Protozoal Infection parasites . E. necatrix. Small parasite found in the intestine and caecum
Affected Systems/Organs
Intestinal tract. Small Intestine (middle).
Infective agent is found in litter, droppings and contaminated objects. Spread is primarily via the faecal-oral route
Mainly Affects
Liveability and Egg production Potential. The extent of the disease is proportional to the amount of infective agent ingested
Adequate Pullet coccidial immunization program. Anticoccidial drugs. Good hygiene practices, vaccinations, coccidiostat in feed or water.
Suggested Actions
  • Can be managed with feed additives, off-the-shelf medications
  • Can be managed with vaccination programs
  • Diagnosis should be confirmed with rapid assays and/or a certified laboratory
  • Veterinary intervention is recommended

Impact on Egg quality


Impact on Liveability


Impact on Production


Overall Economic Impact


Y.M. Saif.2008.Disease of Poultry. 12th Edition.

Mark Pattison, Paul F. McMullin, Janet M. Bradbury. Dennis J. Alexander. 2008. Poultry Diseases. 6th Edition.

Paul McMullin. 2004. A pocket Guide to Poultry Health and Disease. First Edition.

Steven Leeson, John D. Summers. 2008. Commercial Poultry Nutrition. Third Edition.

Donald D. Bell, Williams D. Weaver. 2009.  Commercial Chicken Meat and Egg Production. Fifth Edition.

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