Question

Intestinal coccidiosis in poultry is caused mainly by

• E. necatrix
• E. tenella
• E. brunetti
• E. acervulina

Hint:

Remember that different \textit{Eimeria} species target different parts of the chicken's gut. \textit{E. tenella} (in the ceca) and \textit{E. necatrix} (in the small intestine) are two of the most damaging.

Answer 1

The Correct Option is A

Coccidiosis is a parasitic disease caused by protozoa of the genus \textit{Eimeria}. While multiple species can cause intestinal coccidiosis, two of the most significant and pathogenic species are:

\textit{Eimeria necatrix:} Causes severe disease in the small intestine.
\textit{Eimeria tenella:} Primarily affects the ceca and is one of the most pathogenic species.
Both are major causes of intestinal coccidiosis, but different species affect different parts of the intestine. The question is general, making both strong candidates. \textit{E. acervulina} affects the upper small intestine, and \textit{E. brunetti} affects the lower small intestine and rectum.