Colorado tick fever: Difference between revisions
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*Principal zoonotic reservoirs include deer, marmots, porcupines | *Principal zoonotic reservoirs include deer, marmots, porcupines | ||
*Endemic in western mountainous regions of the U.S. and Canada (e.g. Colorado, Idaho) | *Endemic in western mountainous regions of the U.S. and Canada (e.g. Colorado, Idaho) | ||
*Develops March to September, most cases occur in April, May, June | *Develops March to September, most cases occur in April, May, June <ref>''Colorado tick fever.'' MedlinePlus. https://medlineplus.gov/ency/article/000675.htm. Retrieved 9/9/2017.</ref> | ||
==Clinical features== | |||
*Incubation time ranges from 1-14 days | |||
*Onset of illness characterized by fever (may be biphasic), chills, headache, myalgias, malaise, photophobia | |||
*Less commonly sore throat, vomiting, abdominal pain, skin rash (macular or petechial) | |||
*Rarely, patients may develop severe illness that affects central nervous system with symptoms including neck stiffness and confusion <ref> ''Colorado tick fever.'' Center for Disease Control and Prevention. 13 Jan 2015. https://www.cdc.gov/coloradotickfever/symptoms-treatment.html. Retrieved 9/9/2017.</ref> | |||
==Differential diagnosis== | |||
==References== | |||
<references/> | |||
Revision as of 16:01, 9 September 2017
Bakground
- Abbreviation: CTF
- Also called mountain tick fever, American tick fever
- Caused by RNA virus of genus Coltivirus in family Reoviridae
- Principal vector is Rocky Mountain wood tick (Dermacentor andersoni)
- Principal zoonotic reservoirs include deer, marmots, porcupines
- Endemic in western mountainous regions of the U.S. and Canada (e.g. Colorado, Idaho)
- Develops March to September, most cases occur in April, May, June [1]
Clinical features
- Incubation time ranges from 1-14 days
- Onset of illness characterized by fever (may be biphasic), chills, headache, myalgias, malaise, photophobia
- Less commonly sore throat, vomiting, abdominal pain, skin rash (macular or petechial)
- Rarely, patients may develop severe illness that affects central nervous system with symptoms including neck stiffness and confusion [2]
Differential diagnosis
References
- ↑ Colorado tick fever. MedlinePlus. https://medlineplus.gov/ency/article/000675.htm. Retrieved 9/9/2017.
- ↑ Colorado tick fever. Center for Disease Control and Prevention. 13 Jan 2015. https://www.cdc.gov/coloradotickfever/symptoms-treatment.html. Retrieved 9/9/2017.