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How are rickettsiae transmitted?

  1. Waterborne transmission

  2. Airborne particles

  3. Arthropod bites

  4. Direct contact with infected individuals

The correct answer is: Arthropod bites

Rickettsiae are a type of bacteria that are primarily transmitted through the bites of infected arthropods, such as ticks, fleas, and lice. This transmission occurs when these vectors bite a host and transfer the bacteria into the bloodstream. The relationship between rickettsiae and arthropods is significant because it highlights the role of specific insects in the spread of rickettsial diseases, which can lead to conditions such as Rocky Mountain spotted fever and typhus. Understanding this mode of transmission is critical for implementing preventive measures, such as using insect repellent, wearing protective clothing, and avoiding areas where these vectors are prevalent.