Question

using a tick as a vector, this bacteria leaves a notable red bulls - eye ring around the bite.
○ helicobacter pylori
○ yersinia pestis
○ borrelia burgdorferi
○ clostridium botulinum
question 29 (1 point) ✔ saved
which virus caused covid - 19?
● influenza a virus
○ sars - cov
○ sars - cov - 2
○ mers - cov

Explanation:

First Question (Bacteria with Tick Vector):

• Helicobacter pylori: Associated with stomach ulcers, no tick vector or bullseye rash.
• Yersinia pestis: Causes plague, transmitted by fleas, not ticks, and no bullseye rash.
• Borrelia burgdorferi: Causes Lyme disease, transmitted by ticks (Ixodes), and a bullseye rash (erythema migrans) is a classic symptom.
• Clostridium botulinum: Causes botulism, from contaminated food, no tick vector or bullseye rash.

• Influenza A virus: Causes influenza, not COVID - 19.
• SARS - CoV: Caused SARS (2003), not COVID - 19.
• SARS - CoV - 2: Is the virus that causes COVID - 19.
• MERS - CoV: Caused MERS, not COVID - 19.

Answer:

C. Borrelia burgdorferi

Second Question (Virus Causing COVID - 19):