Cysticercosis is caused by:
**Core Concept**
Cysticercosis is a parasitic infection caused by the larval stage of a tapeworm, which affects various organs and tissues in the human body. This condition is a major public health concern in many developing countries, particularly in areas where sanitation and hygiene are poor.
**Why the Correct Answer is Right**
The correct answer is caused by the larval stage of the pork tapeworm, Taenia solium. When an individual ingests food or water contaminated with the tapeworm eggs, the larvae can penetrate the intestinal wall and migrate to various parts of the body, including muscles, brain, and eyes. The larvae form cysts, which can cause inflammation, damage to surrounding tissues, and even death. The pathogenesis of cysticercosis involves the ingestion of tapeworm eggs, followed by the migration of larvae to various organs and tissues.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not related to the causative agent of cysticercosis.
**Option B:** This option is incorrect because it is a different type of parasitic infection, not related to cysticercosis.
**Option C:** This option is incorrect because it is a different type of parasitic infection, not related to cysticercosis.
**Clinical Pearl / High-Yield Fact**
A key aspect of diagnosing cysticercosis is the presence of antibodies against the tapeworm in the patient's blood. This can be detected through serological tests such as ELISA or immunoblotting. It is essential to note that a negative test result does not rule out the diagnosis, as the sensitivity of these tests can vary.
**Correct Answer: D. Taenia solium.**