Identify the correct option from the following:
A. Dengue fever 1 Aedes aegypti
B. Sand fly 2. Phlebotomus
C. Malaria 3. Leishmania donovani
D. Kala-azar 4. Female anopheles

1. A

   A-3, B-2, C-4, D-1

2. B

   A-2, B-1, C-4, D-2

3. C

   A-4, B-1, C-3, D-2

4. D

   A-1, B-2, C-4, D-3

Appeared in: NORCET 2 - 2021 (shift-1)

Explanation

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• Dengue fever is a viral disease transmitted by the bite of the Aedes aegypti mosquito. This makes the pair A-1 correct.
• Sand fly is the common name for the vector belonging to the genus Phlebotomus. This makes the pair B-2 correct.
• Malaria is a parasitic disease transmitted by the bite of an infected female Anopheles mosquito. This makes the pair C-4 correct.
• Kala-azar (visceral leishmaniasis) is a parasitic disease caused by Leishmania donovani. The vector that transmits this parasite is the sand fly (Phlebotomus). Therefore, D-3 correctly links the disease to its causative agent.

Why Other Options Were Wrong

• Option A: This option incorrectly matches Dengue fever with Leishmania donovani (A-3) and Kala-azar with Aedes aegypti (D-1). Dengue is caused by a virus transmitted by Aedes mosquitoes, while Kala-azar is caused by Leishmania donovani transmitted by sandflies.
• Option B: This option incorrectly matches Dengue fever with Phlebotomus (A-2), Sand fly with Aedes aegypti (B-1), and Kala-azar with Phlebotomus (D-2). Dengue is transmitted by Aedes, and sandflies (Phlebotomus) transmit Leishmania.
• Option C: This option incorrectly matches Dengue fever with Female anopheles (A-4), Sand fly with Aedes aegypti (B-1), Malaria with Leishmania donovani (C-3), and Kala-azar with Phlebotomus (D-2). These pairings are all incorrect.

Related Visual

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Matching of vector-borne diseases with their respective vectors and causative agents as background academic context rather than a clinical decision trigger.
• Understanding the specific vector for a disease is crucial for community health nurses to plan and implement effective vector control strategies, such as source reduction for Aedes mosquitoes (preventing Dengue) or using insecticide-treated nets for Anopheles mosquitoes (preventing Malaria).
• Patient education is a key nursing role. By knowing the vector, nurses can teach individuals and communities about specific preventive measures, such as avoiding outdoor activities during peak biting times of different vectors.
• What if? - If a patient presents with fever and splenomegaly in a region known for both Malaria and Kala-azar, knowing the different vectors and their habitats helps in taking a detailed history about potential exposures (e.g., mosquito bites vs. sandfly bites), which can guide differential diagnosis.

How to Approach the Question

• This is a 'Match the Following' question. The goal is to create correct pairs from two columns.
• First, analyze Column 1 (Diseases/Vectors) and Column 2 (Vectors/Agents).
• Tackle the most familiar pair first. For example, most people know Malaria is transmitted by mosquitoes (Anopheles). So, C matches with 4.
• Next, match Dengue fever. It is widely known to be spread by Aedes mosquitoes. So, A matches with 1.
• Now consider Kala-azar. It is a form of leishmaniasis, caused by Leishmania donovani. So, D matches with 3.
• By elimination, Sand fly (B) must match with Phlebotomus (2), which is the scientific genus name for sandflies.

Concept Tested & Keywords

• Concept Tested: Matching of vector-borne diseases with their respective vectors and causative agents.
• Stem keywords: Dengue fever, Sand fly, Malaria, Kala-azar, Aedes aegypti, Phlebotomus, Leishmania donovani, Female anopheles
• Lead-in keywords: Identify the correct option
• Clinical cues: Age/sex group narrows the expected diagnosis, intervention, or normal reference range.
• Negative lead-in flag: false

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