A68.1 Tick-borne relapsing fever

Name of the Condition

• Tick-borne relapsing fever

Summary

Tick-borne relapsing fever is a bacterial infection characterized by recurring episodes of fever, headache, and muscle/joint pain. It is caused by Borrelia species transmitted through the bite of infected soft-bodied ticks.

Causes

The condition results from infection with Borrelia bacteria. Transmission occurs exclusively through the bite of infected soft-bodied ticks, which are typically found in rodent habitats.

Risk Factors

• Exposure to tick habitats, especially in endemic areas.
• Outdoor activities in regions with high tick infestation rates.
• Lack of protective measures (e.g., clothing, repellents) when in tick-prone environments.

Symptoms

• Repeated episodes of high fever (relapses)
• Chills and sweating
• Headache and muscle aches
• Nausea or vomiting
• Fatigue
• Possible rash or jaundice in severe cases

Diagnosis

Diagnosis involves blood tests to identify Borrelia spirochetes, PCR/molecular tests for bacterial DNA, and physical exams assessing symptoms and exposure history. Clinical suspicion is key given the relapsing nature.

Treatment Options

• Antibiotics (e.g., doxycycline, tetracycline) are standard.
• Antipyretics manage fever/aches.
• Hydration and rest support recovery.

Prognosis and Follow-Up

With timely antibiotics, prognosis is favorable. Follow-up may be needed to monitor for recurrence or complications.

Complications

• Severe cases can lead to organ damage (e.g., liver, heart).
• Neurological issues (e.g., meningitis) may occur in rare instances.

Lifestyle & Prevention

• Avoid tick habitats; use protective clothing and repellents.
• Perform thorough tick checks after outdoor activities.
• Maintain clean living spaces to reduce rodent populations.

When to Seek Professional Help

Seek care if experiencing recurring fever, severe headache, or unexplained muscle pain, especially after potential tick exposure.

Tips for Medical Coders

Document the presence of tick exposure, relapsing fever episodes, and any complications. Ensure clinical notes support the diagnosis for accurate coding.