Bekker et al., "Reorganization of genera in the families Rickettsiaceae
and Anaplasmataceae in the order Rickettsiales: unification of some species of Ehrlichia with Anaplasma, Cowdria with Ehrlichia and Ehrlichia with Neorickettsia, descriptions of six new species combinations and designation of Ehrlichia equi and "HGE agent" as subjective synonyms of Ehrlichia phagocytophila" International Journal of Systematic and Evolutionary Microbiology, vol.
Some species that originally were classified in the Rickettsiaceae
family have been reassigned to different families.
burnetii, in the [gamma]-proteobacteria, order Legionellaceae, whereas the rickettsiae are classified as [alpha]-proteobacteria, order Rickettsiales, family Rickettsiaceae
. (2) Subdivision of the genus Rickettsia into spotted fever and typhus groups has phylogenetic validity as well as clinical and epidemiological relevance.
PCR-positive tick samples indicate the presence of Ehrlichia chaffeensis, an alpha subdivision eubacterium in the family Rickettsiaceae
which is the causative agent of HME.
They belong to the Rickettsiaceae
family as do the R.
The latest deadly tick disease, ehrlichiosis, is caused by Ehrlichia, a genus of bacteria in the family Rickettsiaceae
. Another member of that genus causes Rocky Mountain spotted fever.
Ehrlichia is a genus in the family Rickettsiaceae
; members of the genus are characterized by their parasitism of white blood cells.
Rickettsia parkeri (Rickettsiales: Rickettsiaceae
) detected in ticks of the Amblyomma maculatum (Acari: Ixodidae) group collected from multiple locations in southern Arizona.
The second sequence was 1429 bp (GenBank accession EF433793) and produced significant alignments to the 16S rRNA gene of species in the [alpha]-proteobacterial family Rickettsiaceae
. This sequence was 99% identical (1177/1185 bp) to a 1185-bp homologous region of a partial 16S rRNA gene sequence from the endosymbiont Wolbachia of D.
For example, the use of broad-range PCR primers and sequence analysis has successfully detected diseases caused by members of the Rickettsiaceae
; in particular, the agents of ehrlichiosis have been identified and speciated .
: Reorganization of the genera in the families Rickettsiaceae
and Anaplasmataceae in the order Rickettsiales: unification of some species of Ehrlichia with Anaplasma, Cowdria with Ehrlichia and Ehrlichia with Neorickettsia, descriptions subjective synonyms of Ehrlichia phagocytophila.