Question:medium
Sandfly transmits all of the following diseases, EXCEPT:
Sandfly transmits all of the following diseases, EXCEPT:
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Sandfly spreads all leishmaniases and sandfly fever; relapsing fever is louse or tick borne.
Updated On: Jun 24, 2026
- Oriental sore
- Leishmaniasis
- Kala-azar
- Relapsing fever
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The Correct Option is D
Solution and Explanation
Step 1: This is an exception question, so the task is to find the one disease the sandfly does not carry.
Step 2: Sandflies of the genus Phlebotomus are classic vectors of leishmaniasis in all its forms: visceral leishmaniasis or kala-azar through P. argentipes, and cutaneous leishmaniasis or oriental sore through P. papatasi and P. sergenti.
Step 3: They additionally transmit the viral sandfly fever. Thus three of the four options - oriental sore, leishmaniasis and kala-azar - are genuine sandfly-borne conditions.
Step 4: Relapsing fever, caused by Borrelia, is carried by lice (louse-borne type) or soft ticks (tick-borne type), never by the sandfly, making it the odd one out.
\[\boxed{\text{Relapsing fever}}\]
Step 2: Sandflies of the genus Phlebotomus are classic vectors of leishmaniasis in all its forms: visceral leishmaniasis or kala-azar through P. argentipes, and cutaneous leishmaniasis or oriental sore through P. papatasi and P. sergenti.
Step 3: They additionally transmit the viral sandfly fever. Thus three of the four options - oriental sore, leishmaniasis and kala-azar - are genuine sandfly-borne conditions.
Step 4: Relapsing fever, caused by Borrelia, is carried by lice (louse-borne type) or soft ticks (tick-borne type), never by the sandfly, making it the odd one out.
\[\boxed{\text{Relapsing fever}}\]
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