Question:
Intranuclear schizogony occurs in
Intranuclear schizogony occurs in
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Remember that Eimeria alabamensis is the classic, textbook exception in ruminant coccidia due to its distinct intranuclear lifestyle.
Updated On: Jul 23, 2026
- Eimeria ahsata
- Eimeria alabamensis
- Eimeria auburnensis
- Eimeria bovis
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Coccidian parasites of the genus Eimeria typically undergo schizogony (asexual replication) and gametogony (sexual replication) within the cytoplasm of host epithelial cells.
However, a few species have evolved to develop specifically inside the host cell nucleus.
Detailed Explanation:
Let us look at the development sites of the given bovine and ovine Eimeria species:
- Eimeria ahsata and Eimeria auburnensis: Undergo standard intracytoplasmic development in the host's intestinal epithelial cells.
- Eimeria bovis: Undergo standard intracytoplasmic development, forming large schizonts in the endothelial cells of the lacteals.
- Eimeria alabamensis: This species, which infects cattle, is unique because its schizonts and gamonts develop directly within the nucleus (intranuclear development) of the epithelial cells in the small intestine, rather than the cytoplasm. This is a classic diagnostic feature of this species.
Step 2: Final Answer:
Intranuclear schizogony occurs in Eimeria alabamensis, which corresponds to Option (B).
Coccidian parasites of the genus Eimeria typically undergo schizogony (asexual replication) and gametogony (sexual replication) within the cytoplasm of host epithelial cells.
However, a few species have evolved to develop specifically inside the host cell nucleus.
Detailed Explanation:
Let us look at the development sites of the given bovine and ovine Eimeria species:
- Eimeria ahsata and Eimeria auburnensis: Undergo standard intracytoplasmic development in the host's intestinal epithelial cells.
- Eimeria bovis: Undergo standard intracytoplasmic development, forming large schizonts in the endothelial cells of the lacteals.
- Eimeria alabamensis: This species, which infects cattle, is unique because its schizonts and gamonts develop directly within the nucleus (intranuclear development) of the epithelial cells in the small intestine, rather than the cytoplasm. This is a classic diagnostic feature of this species.
Step 2: Final Answer:
Intranuclear schizogony occurs in Eimeria alabamensis, which corresponds to Option (B).
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