Actinobacteria constitute one of the largest phyla among Bacteria and represent gram-
positive bacteria with a high G+ C content in their DNA. This bacterial group includes …

During most of the 20th century, the epidemiology of tick-borne rickettsioses could be
summarized as the occurrence of a single pathogenic rickettsia on each continent. An …

Flea-borne infections are emerging or re-emerging throughout the world, and their incidence
is on the rise. Furthermore, their distribution and that of their vectors is shifting and …

The best-known members of the bacterial genus Rickettsia are associates of blood-feeding
arthropods that are pathogenic when transmitted to vertebrates. These species include the …

The genus Rhodococcus is a very diverse group of bacteria that possesses the ability to
degrade a large number of organic compounds, including some of the most difficult …

Ticks are hematophagous ectoparasites capable of transmitting multiple human pathogens.
Environmental changes have supported the expansion of ticks into new geographical areas …

Rocky Mountain spotted fever (RMSF) is a life-threatening disease caused by Rickettsia
rickettsii, an obligately intracellular bacterium that is spread to human beings by ticks. More …

Anaplasma (formerly Ehrlichia) phagocytophilum, Ehrlichia chaffeensis, and Neorickettsia
(formerly Ehrlichia) sennetsu are intracellular vector-borne pathogens that cause human …

Rickettsia are best known as strictly intracellular vector‐borne bacteria that cause mild to
severe diseases in humans and other animals. Recent advances in molecular tools and …

Rickettsiae are obligate intracellular bacteria that can cause mild to life-threatening
diseases, including epidemic typhus, one of the oldest pernicious diseases of mankind …