Pacific Coast tick fever

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Pacific Coast tick fever
Eschars identified on the eyebrow, shoulder, and neck of laboratory-confirmed Pacific Coast tick fever individual(s)
CausesRickettsia philipii spread by the Pacific coast tick[1]
Differential diagnosisRickettsia parkeri rickettsiosis, Rocky Mountain spotted fever, rickettsialpox[2]

Pacific Coast tick fever
Scientific classification edit
Domain: Bacteria
Phylum: Pseudomonadota
Class: Alphaproteobacteria
Order: Rickettsiales
Family: Rickettsiaceae
Genus: Rickettsia
Species group: Spotted fever group
R. philipii
Binomial name
Rickettsia philipii
Kato et al. 2010[3]

Pacific Coast tick fever is an infection caused by Rickettsia philipii.[1]

The disease is spread by the Pacific coast ticks.[1]

Symptoms may include an eschar.[1] It is within a group known as spotted fever rickettsiosis together with Rickettsia parkeri rickettsiosis, Rocky Mountain spotted fever, and rickettsialpox.[2] These infections can be difficult to tell apart.[2]


  1. 1.0 1.1 1.2 1.3 "Spotted Fever Group Rickettsia (Rocky Mountain Spotted Fever and Pacific Coast Tick Fever)". Archived from the original on 27 September 2022. Retrieved 20 January 2019.
  2. 2.0 2.1 2.2 "Epidemiology and Statistics Rocky Mountain Spotted Fever (RMSF)". CDC. 26 October 2018. Archived from the original on 9 January 2019. Retrieved 19 January 2019.
  3. Kato, C.Y., Robinson, L.K., White, F.H., Slater, K., Karpathy, S.E., Eremeeva, M.E. and Dasch, G.A. "Insertion/deletion (INDEL) typing of isolates of Rickettsia rickettsii." Georgia Research Alliance Collaboration Roundtable. February 26, 2010. Poster Abstracts no. 10. pp. 5-6