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Clinical concept explainerWorldwide

What is a tick-borne co-infection?

Co-infection means a person or animal has two or more infections at the same time; in tick medicine this may follow one or several bites and must be demonstrated with appropriate evidence.

Reviewed by VuxLore® Knowledge Team For Everyone

Short answer

Co-infection means a person or animal has two or more infections at the same time; in tick medicine this may follow one or several bites and must be demonstrated with appropriate evidence.

At a glance

The possible combinations depend on local ticks, hosts and pathogens, so lists from another region may not apply.

Key takeaways

• Co-infection is not diagnosed by symptoms alone.

• Geography narrows the possibilities.

• Use validated clinician-directed testing.

Similar symptoms complicate recognition

Fever, fatigue, headache and muscle aches occur in many illnesses. A slower recovery or unusual laboratory findings may prompt a clinician to consider another infection.

More testing is not always better

Tests have timing limits and false results. Follow national guidance and avoid claims that every persistent symptom proves hidden co-infection.

Sources and further reading

US Centers for Disease Control and Prevention: Tickborne Diseases of the United States

US Centers for Disease Control and Prevention: Testing and Diagnosis for Lyme disease