Rickettsiosis/rickettsioses are a group of diseases generally caused by species of Rickettsia, a genus of obligate intracellular bacteria. Most of the Rickettsioses are transmitted by ticks, but they can also be transmitted by fleas, lice and mites. Although they are widely distributed throughout the world, the species and associated human clinical diseases vary depending on the geographical locations. Rickettsiosis can be classified into two main groups: the spotted fever group, transmitted by ticks or mites and the typhus group, mainly transmitted by lice or fleas. Many new pathogenic Rickettsiae continue to be identified in recent years.

Latest outputs


Epidemiological situation of rickettsioses in EU/EFTA countries

Technical report -


Pathogens and symbionts in ticks: a survey on tick species distribution and presence of tick-transmitted micro-organisms in Sardinia, ItalyArchived

ECDC comment -

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Disease / public health area


Disease networks

Emerging Viral Diseases-Expert Laboratory Network (EVD-LabNet)

European network for medical and veterinary entomology (VectorNet)