Colorado tick fever differential diagnosis

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Ilan Dock, B.S.

Overview

Colorado tick fever (CTF) must be differentiated from other diseases that cause fever,chills, headaches, body ache, and rash. When trying to differentiate CTF from other infections, it is important to recognize that the clinical manifestations of CTF greatly resemble those of other tick-borne illnesses, especially those caused by the Rickettsiae family. Examples of misdiagnoses, with the umbrella of tick-borne diseases include typhus-spotted fevers and Ehrlichiosis.

Differential Diagnosis

Examples of tick-borne diseases that may be misdiagnosed for Colorado tick fever may be found in the table below:

Disease Organism Vector Symptoms
Bacterial Infection
Borreliosis (Lyme Disease) [1] Borrelia burgdorferi sensu lato complex and B. mayonii I. scapularis, I. pacificus, I. ricinus, and I. persulcatus Erythema migrans, flu-like illness(fatigue, fever), Lyme arthritis, neuroborreliosis, and carditis.
Relapsing Fever [2] Tick-borne relapsing fever (TBRF): Borrelia duttoni, Borrelia hermsii, and Borrelia parkerii Ornithodoros species Consistently documented high fevers, flu-like illness, headaches, muscular soreness or joint pain, altered mental status, painful urination, rash, and rigors.
Louse-borne relapsing fever (LBRF) : Borrelia recurrentis Pediculus humanus
Typhus (Rickettsia)
Rocky Mountain Spotted Fever Rickettsia rickettsii Dermacentor variabilis, Dermacentor andersoni Fever, altered mental status, myalgia, rash, and headaches.
Helvetica Spotted Fever [3] Rickettsia helvetica Ixodes ricinus Rash: spotted, red dots. Respiratory symptoms (dyspnea, cough), muscle pain, and headaches.
Ehrlichiosis (Anaplasmosis) [4] Ehrlichia chaffeensis, Ehrlichia ewingii Amblyomma americanum, Ixodes scapularis Fever, headache, chills, malaise, muscle pain, nausea, confusion, conjunctivitis, or rash (60% in children and 30% in adults).
Tularemia [5] Francisella tularensis Dermacentor andersoni, Dermacentor variabilis Ulceroglandular, glandular, oculoglandular, oroglandular, pneumonic, typhoidal.
Viral Infection
Tick-borne meningoencephalitis [6] TBEV virus Ixodes scapularis, I. ricinus, I. persulcatus Early Phase: Non-specific symptoms including fever, malaise, anorexia, muscle pains, headaches, nausea, and vomiting. Second Phase: Meningitis symptoms, headache, stiff neck, encephalitis, drowsiness, sensory disturbances, and potential paralysis.
Colorado Tick Fever [7] CTF virus Dermacentor andersoni Common symptoms include fever, chills, headache, body aches, and lethargy. Other symptoms associated with the disease include sore throat, abdominal pain, vomiting, and a skin rash. A biphasic fever is a hallmark of Colorado Tick Fever and presents in nearly 50% of infected patients.
Crimean-Congo Hemorrhagic Fever CCHF virus Hyalomma marginatum, Rhipicephalus bursa Initially infected patients will likely feel a few of the following symptoms: headache, high fever, back and joint pain, stomach pain, vomiting, flushed face, red throat petechiae of the palate, and potentially changes in mood as well as sensory perception.
Protozoan Infection
Babesiosis [8] Babesia microti, Babesia divergens, Babesia equi Ixodes scapularis, I. pacificus Non-specific flu-like symptoms.

References

  1. ↑ Lyme Disease Information for HealthCare Professionals. Centers for Disease Control and Prevention (2015). http://www.cdc.gov/lyme/healthcare/index.html Accessed on December 30, 2015
  2. ↑ Relapsing Fever Information. Centers for Disease Control and Prevention (2015). http://www.cdc.gov/relapsing-fever/ Accessed on December 30, 2015
  3. ↑ Rocky Mountain Spotted Fever Information. Centers for Disease Control and Prevention (2015). http://www.cdc.gov/rmsf/ Accessed on December 30, 2015
  4. ↑ Disease index General Information (2015). http://www.cdc.gov/parasites/babesiosis/health_professionals/index.html Accessed on December 30, 2015
  5. ↑ Rocky Mountain Spotted Fever Information. Centers for Disease Control and Prevention (2015). \http://www.cdc.gov/tularemia/index.html Accessed on December 30, 2015
  6. ↑ General Disease Information (TBE). Centers for Disease Control and Prevention (2015). http://www.cdc.gov/vhf/tbe/ Accessed on December 30, 2015
  7. ↑ General Tick Deisease Information. Centers for Disease Control and Prevention (2015). http://www.cdc.gov/coloradotickfever/index.html Accessed on December 30, 2015
  8. ↑ Babesiosis. Centers for Disease Control and Prevention (2015). http://www.cdc.gov/parasites/babesiosis/disease.htmlAccessed December 8, 2015.
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