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An Electroporation Method to Transform Rickettsia spp. with a Fluorescent Protein-Expressing Shuttle Vector in Tick Cell Lines
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Rickettsia felis, an emerging flea-transmitted human pathogen
Mohammad Yazid Abdad1, John Stenos, Stephen Graves
1Australian Rickettsial Reference Laboratory, Geelong Hospital, Geelong, VIC, Australia; myazid@barwonhealth.org.au.
Emerging Health Threats Journal
|October 24, 2013
Summary
Rickettsia felis, a cause of flea-borne spotted fever, is found globally in many arthropod vectors, primarily the cat flea. Its widespread distribution raises public health concerns with climate change.
Area of Science:
- Microbiology
- Epidemiology
- Public Health
Background:
- Rickettsia felis, identified two decades ago, is now endemic worldwide, except Antarctica.
- It causes rickettsiosis, commonly known as flea-borne spotted fever or cat-flea typhus.
- R. felis is considered a pan-global microbe due to its presence in numerous arthropod species.
Purpose of the Study:
- To review the global distribution and vector diversity of Rickettsia felis.
- To highlight the public health implications of R. felis ecology in the context of climate change.
Main Methods:
- Literature review of studies reporting R. felis presence in arthropods.
- Analysis of documented R. felis reservoirs and vectors across continents.
Main Results:
- R. felis is endemic on all continents except Antarctica.
- The cat flea (Ctenocephalides felis) is the primary reservoir and vector, but over 20 other flea, tick, and mite species also harbor R. felis.
- This broad invertebrate association is unusual for bacterial pathogens.
Conclusions:
- Rickettsia felis exhibits extensive global distribution and vector diversity.
- Projected climate change may alter vector ecology and distribution, potentially impacting public health.
- Further research is needed to understand and mitigate the risks associated with R. felis expansion.
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