Question 111: Match List-I with List-II and select the correct answer using the code given below the Lists:
List-I (Vectors):
A. Hard ticks
B. Sandflies
C. Louse
D. Soft ticks
List-II (Diseases):
1. Oriental sore
2. Epidemic typhus
3. Tularemia
4. Relapsing fever
- A. A→4 B→1 C→3 D→2
- B. A→1 B→2 C→3 D→4
- C. A→2 B→4 C→1 D→3
- D. A→3 B→1 C→2 D→4 (Correct Answer)
Explanation: ***A→3 B→1 C→2 D→4***
- **Hard ticks** (A) are primary vectors for **tularemia** (3), transmitting *Francisella tularensis* through their bite during blood feeding.
- **Sandflies** (B) transmit **oriental sore** (1), the cutaneous form of **leishmaniasis** caused by *Leishmania tropica* and other species.
*A→4 B→1 C→3 D→2*
- Incorrectly matches **hard ticks** with **relapsing fever**, which is specifically transmitted by **soft ticks** (*Ornithodoros* species).
- Misassociates **louse** with **tularemia**, when **body lice** are established vectors for **epidemic typhus**.
*A→1 B→2 C→3 D→4*
- Wrongly pairs **hard ticks** with **oriental sore**, which requires **sandfly** vectors for transmission of *Leishmania* parasites.
- Incorrectly matches **sandflies** with **epidemic typhus**, a louse-borne disease caused by *Rickettsia prowazekii*.
*A→2 B→4 C→1 D→3*
- Mismatches **hard ticks** with **epidemic typhus**, which is transmitted by **body lice**, not tick species.
- Incorrectly associates **soft ticks** with **tularemia**, when they are specific vectors for **relapsing fever** caused by *Borrelia* species.