Which of the following human parasites required mosquito to complete their life-cycle?

Options

A. Ascaris lumbricoides and Wuchereria bancrofti
B. Leishmania donovani and Plasmodium ovale
C. Ascaris lumbricoides and Leishmania donovani
D. Wuchereria bancrofti and Plasmodium ovale

Answer

To answer the question of which human parasites require mosquitoes to complete their life cycle, we can follow these steps:

### Step 1: Identify the Parasites
First, we need to identify the parasites mentioned in the question. The common human parasites that are often discussed in relation to mosquitoes include:
- Ascaris
- Leishmania
- Dirofilaria
- Plasmodium (specifically Plasmodium ovale)

### Step 2: Understand the Life Cycle of Each Parasite
Next, we will analyze the life cycle of each parasite to determine if a mosquito is involved:
- **Ascaris**: This is a roundworm that does not require a mosquito. It has a direct life cycle and typically involves soil as a medium.
- **Leishmania**: This protozoan parasite is transmitted by sandflies, not mosquitoes, so it does not require mosquitoes for its life cycle.
- **Dirofilaria**: This is a genus of parasitic roundworms that can be transmitted by mosquitoes. It is important in veterinary medicine, particularly in dogs, but can affect humans as well.
- **Plasmodium ovale**: This is a protozoan parasite that causes malaria and requires mosquitoes (specifically Anopheles mosquitoes) to complete its life cycle. The mosquito acts as a vector for the parasite.

### Step 3: Conclusion
Based on the analysis:
- The parasites that require mosquitoes to complete their life cycle are **Dirofilaria** and **Plasmodium ovale**.

### Final Answer
The human parasites that require mosquitoes to complete their life cycle are **Dirofilaria** and **Plasmodium ovale**.

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