Rickettsial infections--a threat to travellers?

Area of Science:

• Infectious Diseases
• Microbiology
• Public Health

Background:

• Recent advancements in cell-culture and molecular techniques have facilitated the identification of novel rickettsial diseases.
• Understanding these emerging infections is crucial for healthcare providers managing international travelers.

Purpose of the Study:

• To provide an update on newly described rickettsial diseases.
• To highlight the significance of these infections in the context of global travel.

Main Methods:

• Review of recent scientific literature on rickettsial diseases.
• Emphasis on sophisticated diagnostic tools such as cross-adsorption assays, Western blot, cell-culture, and molecular-biological methods.

Main Results:

• Reports of epidemic typhus in the United States and murine typhus in Hawaii.
• African tick bite fever identified as a common rickettsial infection in Africa and among travelers.
• First-time descriptions of Astrakhan fever rickettsia outside Europe and Rickettsia sibirica mongolotimonae in Africa.
• Identification of Rickettsia parkeri, a new agent of spotted fever rickettsiosis, in the United States.

Conclusions:

• Serological testing alone is insufficient for definitive diagnosis, especially in atypical cases.
• Advanced diagnostic methods are critical for the accurate identification and characterization of new rickettsial diseases.