Is Tick Season Getting Worse? Risks for Older Adults – AARP

Tick-Borne Diseases: How Climate Shifts Are Increasing Risks for Older Adults

Ticks are no longer just a seasonal nuisance; they’ve become a year-round health concern. As global climate patterns shift, the geography of tick-borne illnesses is changing, expanding into regions where these pests were once uncommon. While these tiny arachnids pose a threat to everyone, older adults face a disproportionately higher risk of severe complications from the diseases they carry.

Understanding the link between environmental changes and tick activity is the first step in protecting yourself and your loved ones. By recognizing the new risks and implementing strict prevention strategies, you can enjoy the outdoors without compromising your health.

The Climate Connection: Why Tick Season is Expanding

Ticks are highly sensitive to temperature and humidity. Historically, harsh winters acted as a natural check on tick populations, killing off a significant portion of the population or forcing them into dormancy. However, milder winters and warmer spring temperatures are fundamentally altering this cycle.

These climate shifts provide two primary advantages for ticks:

• Expanded Range: Ticks are moving further north and into higher elevations as previously uninhabitable regions become warm enough to support their survival.
• Longer Activity Windows: Ticks are emerging from dormancy earlier in the year and remaining active later into the autumn, effectively lengthening the “tick season.”

As ticks migrate into new territories, they bring diseases with them, exposing populations that may not have the historical awareness or medical infrastructure to recognize and treat these specific infections quickly.

Why Older Adults Face Higher Risks

While a tick bite can affect anyone, the clinical outcome often depends on the host’s immune response. Older adults are more susceptible to severe illness from tick-borne diseases for several biological and physiological reasons.

Immunosenescence
As we age, the immune system undergoes a process called immunosenescence, where its ability to respond to new infections diminishes. This makes it harder for the body to fight off the bacteria or parasites transmitted by ticks, potentially leading to more prolonged or severe symptoms.

Comorbidities and Recovery
Pre-existing health conditions—such as cardiovascular disease or diabetes—can complicate the treatment of tick-borne illnesses. The recovery period for older adults is often longer, and the risk of secondary complications, such as neurological issues or joint inflammation, increases with age.

Common Tick-Borne Threats

Different tick species carry different pathogens. While many people are familiar with Lyme disease, several other infections can be equally dangerous, particularly for those with weakened immune systems.

• Lyme Disease: The most common tick-borne illness in North America, often characterized by a “bullseye” rash and joint pain if left untreated.
• Babesiosis: A parasitic infection that attacks red blood cells. This can be life-threatening for older adults or individuals with compromised immune systems.
• Anaplasmosis: A bacterial infection that causes flu-like symptoms, including fever and chills.

For a full list of symptoms and regional prevalence, the Centers for Disease Control and Prevention (CDC) provides comprehensive tracking and guidance.

Proven Prevention Strategies

The most effective way to treat a tick-borne illness is to prevent the bite from happening in the first place. Use these evidence-based strategies to lower your risk:

Dress for Defense

When walking in wooded or grassy areas, wear long-sleeved shirts and long pants. Tucking your pants into your socks creates a physical barrier that prevents ticks from reaching your skin.

Use Effective Repellents

Use EPA-registered insect repellents containing DEET, picaridin, or IR3535. For clothing and gear, treat items with permethrin, which kills ticks on contact.

Perform Thorough Tick Checks

After spending time outdoors, conduct a full-body check. Pay close attention to “hidden” areas where ticks love to hide:

• Under the arms
• In and around the ears
• Inside the belly button
• Back of the knees
• The scalp and hairline

Post-Bite Protocol: What to Do

If you find a tick attached to your skin, don’t panic, but act quickly. The longer a tick remains attached, the higher the risk of disease transmission.

1. Remove Immediately: Use fine-tipped tweezers to grasp the tick as close to the skin’s surface as possible. Pull upward with steady, even pressure. Avoid twisting or jerking the tick.
2. Clean the Area: After removal, thoroughly clean the bite area and your hands with rubbing alcohol or soap and water.
3. Monitor for Symptoms: Keep an eye on the site for several weeks. If you develop a rash, fever, chills, or joint aches, contact your healthcare provider immediately.

Frequently Asked Questions

Do all ticks carry Lyme disease?

No. Different species of ticks carry different pathogens. Some ticks may not carry any disease-causing bacteria at all, but it is safest to treat every tick bite as a potential risk.

Is “burning” a tick off the skin effective?

No. Never use heat, nail polish, or petroleum jelly to remove a tick. These methods can irritate the tick and cause it to regurgitate infected fluids into your bloodstream, increasing the risk of infection.

When should I see a doctor after a tick bite?

You should seek medical attention if you develop a rash (especially one that looks like a target), experience unexplained fever or aches, or if the tick was attached for a significant amount of time.

As our environment continues to change, vigilance is our best tool. By staying informed and proactive, older adults can continue to enjoy nature while minimizing the risks posed by the expanding reach of tick-borne diseases.