Colorado Tick Fever

Colorado Tick Fever

National Organization for Rare Disorders, Inc.

Important

It is possible that the main title of the report Colorado Tick Fever is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.

Synonyms

  • CTF
  • Mountain Fever
  • Mountain Tick Fever

Disorder Subdivisions

  • None

General Discussion

Colorado Tick Fever is a rare viral disease transmitted by ticks that commonly inhabit the western United States. Major symptoms may include fever, headaches, muscle aches, and/or generalized discomfort (myalgia). The symptoms usually last for about a week and resolve on their own.

Symptoms

Colorado Tick Fever typically has a sudden onset about five days after a tick bite. It usually occurs at moderate altitudes during spring or early summer. The symptoms are flu-like and may include chills, headache, increased sensitivity to light (photophobia), fatigue, nausea, vomiting, and a lack of appetite. Muscle pain occurs, especially in the legs and back. There may be a slight, reddish rash, and the spleen can become enlarged (splenomegaly). Fever may rise sharply for two or three days and then subside only to return after a day or two (biphasic fever). The second fever typically subsides after 2 to 4 days.



In very rare childhood cases, severe illness involving the central nervous system may occur. Symptoms may include acute inflammation of the membranes around the brain (aseptic meningitis) and/or spinal cord (encephalitis).

Causes

Colorado Tick Fever is a rare viral disease caused by a virus belonging to the Coltivirus family. It is transmitted to humans through the bite of the wood tick (Dermacentor andersoni).

Affected Populations

Colorado Tick Fever is a rare viral disease that affects males and females in equal numbers. Most reported cases have occurred in the Rocky Mountain area of the United States and the western provinces of Canada. Several hundred cases of this disease are reported each year in these areas where the wood tick lives (endemic). However, it is possible that many additional cases are misdiagnosed or undiagnosed.

Standard Therapies

The diagnosis of Colorado Tick Fever is confirmed by isolation of the virus from the blood. Treatment for Colorado Tick Fever is symptomatic and may include acetaminophen to relieve headaches and muscle pain.



The most effective means of preventing Colorado Tick Fever is the use of protective clothing or chemical tick repellents when visiting endemic areas during the spring and summer. Individuals should inspect themselves frequently for ticks and quickly remove them when found.

Investigational Therapies

Information on current clinical trials is posted on the Internet at www.clinicaltrials.gov. All studies receiving U.S. government funding, and some supported by private industry, are posted on this government web site.



For information about clinical trials being conducted at the NIH Clinical Center in Bethesda, MD, contact the NIH Patient Recruitment Office:



Tollfree: (800) 411-1222

TTY: (866) 411-1010

Email: prpl@cc.nih.gov



For information about clinical trials sponsored by private sources, contact:

www.centerwatch.com

References

TEXTBOOKS

Bennett JC, Plum F., eds. Cecil Textbook of Medicine. 20th ed. Philadelphia, PA: W.B. Saunders Co; 1996:1805-07.



Fields BN, et al., Fields Virology, 2nd ed. New York, NY: Raven Press; 1990:1421-27.



REVIEW ARTICLES

Friedman AD., Hematologic manifestations of viral infections. Pediatr Ann. 1996;25:555-60.



Myers SA, et al., Dermatologic manifestations of arthropod-borne diseases. Infect Dis Clin North Am. 1994;8:689-712.



JOURNAL ARTICLES

Attoui H, et al., Serologic and molecular diagnosis of Colorado tick fever viral infections. Am J Trop Med Hyg. 1998;59:763-68.



Attoui H, et al., Complete nucleotide sequence of Colorado tick fever virus segments M6, S1 and S2. J Gen Virol. 1997;78:2895-99.

Resources

Lyme Disease Foundation

P.O. Box 332

Tolland, CT 06084-0332

Email: info@lyme.org

Internet: http://www.lyme.org



Centers for Disease Control and Prevention

1600 Clifton Road NE

Atlanta, GA 30333

Tel: (404)639-3534

Tel: (800)232-4636

TDD: (888)232-6348

Email: cdcinfo@cdc.gov

Internet: http://www.cdc.gov/



NIH/National Institute of Allergy and Infectious Diseases

Office of Communications and Government Relations

6610 Rockledge Drive, MSC 6612

Bethesda, MD 20892-6612

Tel: (301)496-5717

Fax: (301)402-3573

Tel: (866)284-4107

TDD: (800)877-8339

Email: ocpostoffice@niaid.nih.gov

Internet: http://www.niaid.nih.gov/



World Health Organization (WHO)

Avenue Appia 20

Geneva 27, 1211

Switzerland

Tel: 41227912111

Fax: 41227913111

Internet: http://www.who.int/en/



Genetic and Rare Diseases (GARD) Information Center

PO Box 8126

Gaithersburg, MD 20898-8126

Tel: (301)251-4925

Fax: (301)251-4911

Tel: (888)205-2311

TDD: (888)205-3223

Internet: http://rarediseases.info.nih.gov/GARD/



For a Complete Report

This is an abstract of a report from the National Organization for Rare Disorders, Inc.® (NORD). Cigna members can access the complete report by logging into myCigna.com. For non-Cigna members, a copy of the complete report can be obtained for a small fee by visiting the NORD website. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational treatments (if available), and references from medical literature. For a full-text version of this topic, see http://www.rarediseases.org/search/rdblist.html.

This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use . How this information was developed to help you make better health decisions.

Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.