Which of the following human parasites require mosquito to complete their life cycle

Options

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

Answer

To determine which human parasites require a mosquito to complete their life cycle, we will analyze each of the given options step by step.

### Step 1: Analyze the first option - Ascaris Lumbricoides and Wuchereria Bancrofti
- **Ascaris Lumbricoides**: This is a roundworm that causes ascariasis. It does not require a mosquito for its life cycle; it is transmitted through contaminated food and water.
- **Wuchereria Bancrofti**: This is a filarial worm that causes lymphatic filariasis (elephantiasis) and requires a mosquito (specifically, the Culex mosquito) to complete its life cycle.

**Conclusion**: Since Ascaris Lumbricoides does not require a mosquito, this option is incorrect.

### Step 2: Analyze the second option - Ascaris Lumbricoides and Leishmania Donovani
- **Ascaris Lumbricoides**: As established, this parasite does not require a mosquito.
- **Leishmania Donovani**: This parasite causes leishmaniasis and is transmitted by sandflies, not mosquitoes.

**Conclusion**: Since both parasites in this option do not require a mosquito, this option is also incorrect.

### Step 3: Analyze the third option - Leishmania Donovani and Plasmodium Ovale
- **Leishmania Donovani**: As noted, this does not require a mosquito.
- **Plasmodium Ovale**: This is a protozoan parasite that causes malaria and requires female Anopheles mosquitoes to complete its life cycle.

**Conclusion**: Since Leishmania Donovani does not require a mosquito, this option is incorrect.

### Step 4: Analyze the fourth option - Plasmodium Ovale and Wuchereria Bancrofti
- **Plasmodium Ovale**: As discussed, this parasite requires a mosquito (Anopheles) for its life cycle.
- **Wuchereria Bancrofti**: This parasite also requires a mosquito (Culex) for its life cycle.

**Conclusion**: Both parasites in this option require a mosquito to complete their life cycle, making this the correct answer.

### Final Answer:
The correct answer is **Plasmodium Ovale and Wuchereria Bancrofti**.

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