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    Tick paralysis

    Tick paralysis is a loss of muscle function that results from a tick bite.

    Causes

    Hard- and soft-bodied female ticks are believed to make a poison that can cause paralysis in children. Ticks attach to the skin to feed on blood. It is during this feeding process that the toxin enters the bloodstream.

    The paralysis is ascending -- that means it starts in the lower body and moves up. It is similar to that seen in Guillain-Barre syndrome and opposite that seen in botulism and paralytic shellfish poisoning.

    Symptoms

    Children with tick paralysis develop an unsteady gait (ataxia) followed several days later by weakness in the lower legs that gradually moves up to involve the upper limbs.

    Paralysis may cause breathing difficulties, which may require the use of a breathing machine.

    The child may also have mild, flu-like symptoms (muscle aches, tiredness).

    Exams and Tests

    The person will have been exposed to ticks in some way. For example, he or she may have been on a recent camping trip, live in a tick-infested area, or have dogs or other animals that can pick up ticks. Often the tick is found only after thoroughly searching the person's hair.

    Finding a tick embedded in the skin and noting above symptoms confirms the diagnosis. No other testing is required.

    Treatment

    Removing the tick removes the source of the neurotoxin. Recovery is rapid following the removal of the tick.

    Outlook (Prognosis)

    Full recovery is expected following the removal of the tick.

    • Respiratory failure

    When to Contact a Medical Professional

    If your child suddenly becomes unsteady or weak, have the child examined promptly. Breathing difficulties require emergency care.

    Prevention

    Use insect repellents and protective clothing when out in tick-infested areas. Carefully check the skin after being outside and remove any ticks.

    As a rule, if children are discovered to have ticks, it is a good idea to write the information down and keep it for several months. Many tick-borne diseases do not show symptoms immediately, and the incident may be forgotten by the time a child becomes sick with a tick-borne disease.

    References

    Diaz JH. Ticks, including tick paralysis. In: Mandell GL, Bennett JE, Dolin R, eds. Principles and Practice of Infectious Diseases. 7th ed. Philadelphia, Pa: Elsevier Churchill Livingstone; 2009:chap 297.

    Bolgiano EB, Sexton J. Tick-borne illnesses. In: Marx JA, Hockberger RS, Walls RM, et al, eds. Rosen's Emergency Medicine: Concepts and Clinical Practice. 7th ed. Philadelphia, Pa: Mosby Elsevier; 2009:chap 132.

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                Review Date: 5/10/2013

                Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, Bethanne Black, Stephanie Slon, and Nissi Wang.

                The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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                St. Luke's Hospital - 232 South Woods Mill Road - Chesterfield, MO 63017 Main Number: 314-434-1500 Emergency Dept: 314-205-6990 Patient Billing: 888-924-9200
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