**Core Concept**
Filariasis is a parasitic disease caused by infection with filarial worms, primarily transmitted through the bite of an infected mosquito. The most common species causing filariasis in humans are Wuchereria bancrofti, Brugia malayi, and Brugia timori, which lead to lymphatic filariasis. The disease is characterized by the accumulation of lymph fluid in the affected tissues, resulting in swelling and damage to the lymphatic system.

**Why the Correct Answer is Right**
The correct answer is related to the fact that microfilariae of Wuchereria bancrofti, the primary causative agent of lymphatic filariasis, have a characteristic nocturnal periodicity, peaking in the late evening and early morning hours. This periodicity is essential for the diagnosis and surveillance of the disease. The microfilariae are also sensitive to diethylcarbamazine (DEC), a commonly used antifilarial drug.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because filariasis is not typically associated with jaundice, which is a characteristic feature of viral or bacterial infections. While some filarial species can cause liver damage, jaundice is not a common presentation of the disease.

**Option B:** This option is incorrect because the primary mode of transmission of filariasis is through the bite of an infected mosquito (Culex, Anopheles, or Aedes species), not through contaminated water or food. While contaminated water can facilitate the spread of other diseases, it is not a significant factor in the transmission of filariasis.

**Option C:** This option is incorrect because the microfilariae of Wuchereria bancrofti, the primary causative agent of lymphatic filariasis, are not typically found in the blood during the day. Instead, they have a characteristic nocturnal periodicity, peaking in the late evening and early morning hours.

**Option D:** This option is incorrect because the treatment of choice for filariasis is not typically surgery, but rather antifilarial medications such as diethylcarbamazine (DEC) or ivermectin. Surgery may be required in some cases to manage complications such as lymphedema or hydrocele.

**Clinical Pearl / High-Yield Fact**
The nocturnal periodicity of microfilariae in Wuchereria bancrofti infection is a critical factor for diagnosis and surveillance. A blood smear taken during the late evening or early morning hours can help confirm the diagnosis. Additionally, the use of antifilarial medications such as DEC or ivermectin can help reduce microfilarial loads and alleviate symptoms.

**Correct Answer:** D.