**Core Concept**
The question requires knowledge of tick-borne viral infections, specifically the pathogen responsible for causing disease upon tick transmission. Tick-borne viral infections are a significant public health concern worldwide, with various pathogens transmitted through tick bites.
**Why the Correct Answer is Right**
The correct answer is a viral infection caused by Borrelia burgdorferi, transmitted by the tick Ixodes scapularis. This infection leads to Lyme disease, characterized by symptoms such as fever, headache, and a characteristic skin rash known as erythema migrans. The pathogenesis involves the tick's saliva, which contains spirochetes that infect the human host upon a tick bite.
**Why Each Wrong Option is Incorrect**
**Option A:** Other tick-borne diseases like Rocky Mountain spotted fever (caused by Rickettsia rickettsii) or Southern tick-associated rash illness (STARI) are transmitted by ticks, but they are not viral infections.
**Option B:** Tick-borne encephalitis virus (TBEV) is transmitted by ticks, but it is not the primary example of tick-borne viral infection.
**Option C:** No specific viral infection is commonly associated with this option.
**Clinical Pearl / High-Yield Fact**
The characteristic skin rash of Lyme disease (erythema migrans) is often described as a "bull's-eye" lesion, making it a memorable diagnostic clue for tick-borne illnesses.
**Correct Answer:** B. Tick-borne encephalitis virus (TBEV).
Free Medical MCQs · NEET PG · USMLE · AIIMS
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