CLonarchis sinensis causes –
**Core Concept**
Clonorchis sinensis, also known as the Chinese liver fluke, is a type of parasitic flatworm that infects the liver and bile ducts of humans. It is a significant public health concern in East Asia, particularly in China, Korea, and Southeast Asia.
**Why the Correct Answer is Right**
Clonorchis sinensis infection occurs when humans consume raw, undercooked, or pickled fish containing the parasite's metacercariae. The metacercariae then penetrate the intestinal wall and migrate to the bile ducts, where they mature and lay eggs. Chronic infection with Clonorchis sinensis can lead to bile duct cancer, liver cirrhosis, and other complications.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Clonorchis sinensis is not associated with the skin, which is more commonly affected by other parasites like hookworms or strongyloides.
**Option B:** This option is incorrect because Fasciola hepatica, also known as the liver fluke, is a different species of parasite that infects the liver and bile ducts, but has a different life cycle and geographic distribution.
**Option C:** This option is incorrect because Giardia lamblia is a protozoan parasite that infects the small intestine, not the liver or bile ducts.
**Clinical Pearl / High-Yield Fact**
It's essential to note that Clonorchis sinensis infection can be asymptomatic for many years, making it difficult to diagnose. However, patients with chronic infection may present with symptoms like abdominal pain, jaundice, and pruritus.
**Correct Answer: D. Bile duct cancer and liver cirrhosis.**