Tick bites can expose people to more than one type of infection. While Lyme disease is one of the best-known tick-borne illnesses, Ehrlichiosis is another infection that can be transmitted by certain ticks. In some cases, a person can become infected with both Lyme disease and Ehrlichiosis. This creates overlapping symptoms that can make the overall picture more difficult to understand.
Understanding how these two tick-borne infections differ — and where they overlap — can help you recognize why a comprehensive evaluation may be important after a potential tick exposure.
What Is Lyme Disease?
Lyme disease is a bacterial infection most commonly transmitted through the bite of infected blacklegged ticks. Early symptoms can include fever, headache, fatigue, muscle and joint aches, and swollen lymph nodes. Some people develop the characteristic erythema migrans rash, but a rash does not occur in every case.
When Lyme disease is recognized and appropriately treated, many people recover. However, symptoms can vary considerably from person to person, making awareness of potential tick exposure important.
What Is Ehrlichiosis?
Ehrlichiosis is a group of bacterial infections transmitted primarily by infected ticks. In the United States, ehrlichiosis is most commonly associated with Ehrlichia chaffeensis. It is particularly prevalent in the South and Southeast.
Symptoms often develop within days to a couple of weeks after a tick bite and may include fever, chills, headache, fatigue, muscle aches, nausea, and other flu-like symptoms.
Ehrlichiosis can sometimes become serious, especially when treatment is delayed, which makes prompt medical evaluation important when the infection is suspected.
How Can Lyme Disease and Ehrlichiosis Overlap?
Lyme disease and Ehrlichiosis are caused by different bacteria, but their symptoms can look remarkably similar. Both may cause:
- Fatigue
- Fever or chills
- Headaches
- Muscle aches
- Joint discomfort
- General weakness
- Flu-like symptoms
This overlap can make it challenging to identify the specific infection responsible for symptoms based on symptoms alone.
Additionally, a tick may carry more than one pathogen. This means that a person with a history of tick exposure may potentially have more than one tick-borne infection at the same time.
Why Co-Infections Matter
When Lyme disease and Ehrlichiosis occur together, symptoms may be more complicated or may not follow the expected pattern of one infection. This is one reason healthcare professionals may consider a person’s complete history rather than focusing on a single symptom.
A potential tick exposure, geographic location, outdoor activities, timing of symptoms, physical findings, and appropriate laboratory testing may all be considered when evaluating possible tick-borne infections.
It is also important to remember that not every person with persistent symptoms has a coinfection. A thorough evaluation is needed to determine what may be contributing to a person’s symptoms.
What If Symptoms Continue After a Tick Exposure?
If you develop unexplained or persistent symptoms after spending time in areas where ticks are present, consider speaking with a qualified healthcare professional. Even if you don’t remember a tick bite, mention any potential exposure.
Keeping a record of when symptoms began, where you may have encountered ticks, and any previous testing or treatment can provide helpful information during an evaluation.
At Functional Healing with Dr. Tara, we take a whole-person approach to complex health concerns. Understanding the possibility of overlapping tick-borne infections can be an important part of having an informed conversation about your health.
If you suspect you may have been exposed to Lyme disease, Ehrlichiosis, or another tick-borne infection, don’t ignore persistent or unexplained symptoms. Talk with a healthcare professional about whether further evaluation may be appropriate.
