C. burnetii, the causative agent of Q fever, is fascinating because it can be transmitted through airborne routes, which sets it apart from other closely related Rickettsia that typically require insect or tick vectors for transmission to humans. This unique mode of transmission is likely due to the highly resistant nature of C. burnetii spores, allowing them to persist in the environment and become aerosolized. Unlike Rickettsia, which are often confined to the life cycles of their arthropod hosts, C. burnetii can be released from infected animals, particularly cattle, sheep, and goats, into the air in the form of small particles. When inhaled, these particles can lead to infection in humans. This adaptability not only highlights the evolutionary advantages of C. burnetii but also raises concerns for public health, making awareness and control measures critical in vulnerable areas.
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3. What disease does C. burnetii cause? Why can this disease be transmitted by airborne routes while other (closely related) rickettsia require insects and ticks for transmission to humans?
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