title: Expanded Geographic Distribution and Clinical Characteristics of Ehrlichia ewingii Infections, United States.
abstract: Ehrlichiosis is a bacterial zoonosis, spread through the bites of infected ticks, that is most commonly caused in the United States by infection with the bacterium Ehrlichia chaffeensis. We retrospectively reviewed samples from an 18-month study of ehrlichiosis in the United States and found that E. ewingii was present in 10 (9.2%) of 109 case-patients with ehrlichiosis, a higher rate of infection with this species than had previously been reported. Two patients resided in New Jersey and Indiana, where cases have not been reported. All patients with available case histories recovered. Our study suggests a higher prevalence and wider geographic distribution of E. ewingii in the United States than previous reports have indicated.
authors.forename: Rebecca M
authors.initials: RM
authors.lastname: Harris
authors.forename: Brianne A
authors.initials: BA
authors.lastname: Couturier
authors.forename: Stephan C
authors.initials: SC
authors.lastname: Sample
authors.forename: Katrina S
authors.initials: KS
authors.lastname: Coulter
authors.forename: Kathleen K
authors.initials: KK
authors.lastname: Casey
authors.forename: Robert
authors.initials: R
authors.lastname: Schlaberg
mesh_terms: D000328:Adult; D000368:Aged; D000820:Animal Diseases / Q000453:epidemiology; D000818:Animals; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D000907:Antibodies, Bacterial / Q000276:immunology; D004536:Ehrlichia / Q000145:classification* / Q000235:genetics / Q000276:immunology; D016873:Ehrlichiosis / Q000175:diagnosis* / Q000188:drug therapy / Q000453:epidemiology* / Q000382:microbiology; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D008297:Male; D011159:Population Surveillance; D015995:Prevalence; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012189:Retrospective Studies; D016896:Treatment Outcome; D014481:United States / Q000453:epidemiology; D055815:Young Adult
chemical_list: D000900:Anti-Bacterial Agents; D000907:Antibodies, Bacterial; D012336:RNA, Ribosomal, 16S
keywords: Ehrlichia chaffeensis; Ehrlichia ewingii; Ehrlichiosis; United States; bacteria; geographic distribution; ticks; vector-borne infections; zoonoses