November 6, 2020

Babesiosis

Epidemiology Incidence:
  • Overall annual incidence rose from 0.6 to 0.9 cases per 100,000 in the United States between 2012 and 2015 (Gray 2019)
  • Annual incidence is highest in those between 60-69 years of age (Gray 2019)
Age:
  • Median age is 63 years of age with greater than 89% of cases reported in Caucasian patients (Gray 2019 2010)
Gender:
  • Male to female predominance (Gray 2019)

November 5, 2020

Rocky Mountain Spotted Fever (RMSF)

Epidemiology Incidence:
  • Overall annual incidence rose from 1.7 to 7 cases per million in the United States between 2000 and 2007 (Openshaw 2010)
  • Annual incidence is highest in children aged 5-9 years of age (Amsden 2005)
Age:
  • Median age is 42 years of age with greater than 87% of cases reported in Caucasian patients (Openshaw 2010)
Gender:
  • Slight male to female predominance (Openshaw 2010)

November 4, 2020

Ehrlichiosis

Epidemiology Incidence:
  • Overall annual incidence noted to be 3.2 cases per million in the United States between 2008 and 2012 (Biggs 2016)
  • Highest incidence occurs in those 60-69 years of age (Biggs 2016)
Age:
  • Median age is 55 years of age with 64% of cases reported in Caucasian patients (Heitman 2016)
Gender:
  • Slight male to female predominance (Heitman 2016)

November 3, 2020

Anaplasmosis

Epidemiology Incidence:
  • Overall annual incidence rose from 1.4 to 6.1 cases per million in the United States between 2000 and 2010 (Ismail 2017)
  • In endemic areas, the incidence rate is suggested to be more than 50 cases per 100,000 (Ismail 2017)
Age:
  • Median age is 51 years of age with greater than 95% of cases reported in Caucasian patients (Ismail 2017)
Gender:
  • Slight male to female predominance (Demma 2006)

November 2, 2020

Tick Borne Illness Tick-borne disease surveillance studies have shown increasing prevalence, transmission, and disease burden over the last decade. Tick-borne illnesses remain a public health threat and the true incidence remains unknown and is thought to be underrepresented. Although Lyme Disease is the most frequently reported tick-borne disease in the United States, the incidence of four other tick-borne diseases is noted to be increasing in the United States:
  1. Anaplasmosis (Nov 3rd, 2020)
  2. Ehrlichiosis (Nov 4th, 2020)
  3. Rocky Mountain Spotted Fever (Nov 5th, 2020)
  4. Babesiosis (Nov 6th, 2020)
In this five-part post, we will review the salient features of these other emerging tick-borne illnesses to increase recognition of these disease entities. This overview will serve to lay a foundation and summarize shared features of tick-borne illnesses prior to diving into each specific disease.
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