Relapsing Fever Follow-up
- Author: Kauser Akhter, MD; Chief Editor: Michael Stuart Bronze, MD more...
Deterrence/Prevention
- Louse-borne relapsing fever (LBRF) can be prevented by eliminating circumstances that promote louse infection (eg, crowding, homelessness) and good personal hygiene (eg, changing clothes at frequent intervals, bathing, boiling and washing clothes and bedding).
- Delousing with 1% lindane, DDT powder, or Lysol is useful in shelters and in patients and household contacts.
- Avoiding rodents can prevent tick-borne relapsing fever (TBRF). This includes use of appropriate clothing and tick repellents when entering tick-infested areas.
- Postexposure prophylaxis is recommended in individuals who have been exposed to ticks in a high-risk environment. An initial dose of doxycycline 200 mg the first day followed by 100 mg daily for 4 days was found to be 100% efficacious in a double-blind, placebo-controlled trial of 93 subjects.[29]
- No vaccine is currently available for relapsing fever.
Complications
- During episodes of spirochetemia, the organisms may invade the brain, eye, inner ear, heart, or liver.[4] CNS involvement is more common in TBRF than in LBRF[4] ; however, eschars, adult respiratory distress syndrome (ARDS), cranial nerve palsies, focal neurologic deficits, uveitis, iritis or iridocyclitis, splenic rupture, and myocarditis may be seen in both TBRF and LBRF.[2, 30] Myelitis, radiculopathy, hemiplegia, stupor, and even coma have also been reported.[31, 32]
- Relapsing fever may be more dangerous in patients with impaired B-cell function or asplenia. T-cell deficiency/impairment does not seem to play a role in acute relapsing fever.[27]
- Treatment of relapsing fever usually results in a Jarisch-Herxheimer reaction, especially following penicillin therapy. The reaction is characterized by fever, chills, rigors, diaphoresis, tachycardia, and hypotension. Cytokines, especially tumor-necrosis factor (TNF)–alpha, IL-6, and IL-8, have all been implicated.[14] The reaction usually occurs within 2-4 hours of administration of the antibiotic. Patients should be observed closely for this reaction, as it can mimic a febrile crisis and may be dangerous.
- Relapsing fever in pregnant women increases the risk of spontaneous abortions and severe maternal infection. Transplacental transmission of the bacteria is also a risk.[14]
Prognosis
- For more information, see Mortality/Morbidity.
Patient Education
- Patients should be educated on avoidance and/or elimination of arthropod vectors.
- For excellent patient education resources, visit eMedicine's Bites and Stings Center. Also, see eMedicine's patient education article Ticks.
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