How to Spot Tularemia Symptoms in Elderly Adults

If an older parent is suddenly weak, confused, or on the floor after mowing, gardening, a tick bite, a deer-fly bite, contact with a sick or dead animal, or untreated water, do not wait for a perfect “high fever and body aches” picture before asking about tularemia symptoms in elderly adults. In older adults, infection can show up first as “not himself,” “too tired to stand,” “a little mixed up,” or a new fall.

That is not overreacting. Older adults may mount little or no fever during an infection, and experts quoted by AARP advise treating a temperature about 2°F above that person’s own normal as meaningful instead of waiting for the standard 100.4°F cutoff. AARP also lists falling as one of the surprising signs of infection in older adults and advises staying more tuned in for a day or so after a fall. [1]

Tularemia is a bacterial infection caused by Francisella tularensis. It can take several forms depending on how the person was exposed, including through tick or deer-fly bites, handling infected animals, inhaling contaminated dust or aerosols, or drinking contaminated water. Symptoms most often begin 3 to 5 days after exposure, but the range is 1 to 21 days. [2]

The important caregiver move is simple: put the symptom and the exposure in the same sentence. “He fell this morning, he is weaker than usual, and he mowed near a dead rabbit two days ago” is a different call than “he seems tired.”

Why tularemia can be missed in an older adult

Most symptom lists are built around recognizable infection clues: fever, chills, headache, malaise, fatigue, muscle aches, sore throat, gastrointestinal symptoms, swollen lymph nodes, a skin ulcer, cough, chest pain, or trouble breathing. Those signs matter. The problem at home is that an older adult may not hand you the textbook version on the first day.

A Minnesota report from 2024 is a useful reminder, even though it was small and not an elderly-only study. Among five confirmed cases, the median age was 64. All five had fever and weakness or lethargy; two had altered mental status; four had abnormal chest imaging; all five were hospitalized for a median of 6 days; and in three of the five, tularemia was not identified until after hospital discharge. [3]

That report does not prove that confusion or falling is specific to tularemia. It does show why profound weakness and altered mental status deserve to be mentioned clearly when there has been a plausible exposure. A separate 2024 Boulder County notice described a pneumonic tularemia case linked to mowing or gardening exposure in which illness progressed from fever to altered mental status. [4]

For a fall-prevention family, this is where the categories blur. A new fall after yard work may still be dehydration, medication side effects, poor sleep, a tripping hazard, or another common problem. But if there was a tick bite, deer-fly bite, dead animal nearby, heavy mowing, gardening, or untreated water exposure, infection belongs on the list.

First, ask the exposure questions

Before trying to sort every symptom, ask what happened in the past three weeks. Tularemia symptoms usually appear within a few days, but the possible window extends up to 21 days. [2]

• Tick or deer-fly bite: Ask about bites, attached ticks, itchy or painful spots, or a new scab or ulcer near a bite site.
• Mowing, gardening, brush clearing, or yard work: Ask whether dust, clippings, animal remains, nests, or disturbed soil were involved.
• Dead or sick animals: Ask specifically about rabbits, rodents, or other wildlife found near a shed, garden, mower, woodpile, or trail.
• Handling animals: Ask about touching, moving, skinning, cleaning, or disposing of a wild animal, even if gloves were used.
• Untreated water: Ask about drinking from or being splashed by untreated streams, ponds, tanks, or other outdoor water sources.
• Timing: Write down the date or best estimate. “Saturday afternoon” is useful. “Sometime last week” is still better than nothing.

If the older adult lives alone, do not rely only on what they volunteer. Look for the practical clues: muddy shoes by the door, a mower still out, a gardening glove in a pocket, a new bandage, a bite they dismissed, or a neighbor’s memory that a sick animal was seen nearby.

Tularemia warning-sign checklist for older adults

Use this checklist when there has been a possible exposure. One symptom by itself does not diagnose tularemia, and this article is not a substitute for medical care. The point is to notice a pattern early enough to call and describe it well.

1. Fever or chills. CDC lists fever and chills among common tularemia symptoms, and fever can be as high as 104°F. In an older adult, also treat a small rise above that person’s usual temperature as important, especially if behavior, strength, or balance has changed. [2][1]
2. Headache, malaise, fatigue, or muscle aches. These can sound ordinary, but after a tick bite, deer-fly bite, yard work, animal exposure, or untreated water exposure, “flu-like” symptoms should be reported rather than watched casually. [2]
3. Sore throat or digestive symptoms. Tularemia can include sore throat, nausea, vomiting, diarrhea, or abdominal pain. These symptoms may pull attention toward a stomach bug, but the exposure history still matters. [2]
4. A skin ulcer near a bite or contact site. The most common form, ulceroglandular tularemia, can cause a skin ulcer after a tick or deer-fly bite or after handling an infected animal. [2]
5. Swollen lymph nodes near the affected area. With ulceroglandular disease, swollen regional lymph nodes can appear near the bite, scratch, or contact site. Check the armpit, groin, neck, or nearby area depending on where the sore is. [2]
6. Sudden fatigue, weakness, or lethargy. This is one of the most useful home clues because it is visible. The Minnesota 2024 cases all had weakness or lethargy, and all were hospitalized. [3]
7. Confusion, unusual sleepiness, or altered mental status. If the person cannot follow a familiar conversation, is newly disoriented, seems unusually withdrawn, or is “not making sense,” say that plainly when you call. In the Minnesota cluster, 40% had altered mental status. [3]
8. A new fall, near-fall, or balance change. A fall is not a tularemia-specific sign, but in older adults it can be a nonspecific sign that an infection or another acute illness is brewing. If the fall came after possible tularemia exposure, include it in the medical call instead of treating it only as a home-safety event. [1]
9. Cough, chest pain, or difficulty breathing. Pneumonic tularemia is the most serious form and can involve cough, chest pain, and difficulty breathing. In the Minnesota report, 80% had abnormal chest imaging; the Boulder County pneumonic case was associated with mowing or gardening exposure. [2][3][4]

If there was a fall, also handle the fall as a fall. Check for injury, head impact, new pain, blood thinner use, dizziness, and whether the person can safely stand or walk. The exposure history does not replace ordinary post-fall safety steps; it adds an infection question that might otherwise be missed. For a broader post-fall process, see the Fall Prevention FAQ for Seniors and Caregivers and the Fall Prevention Handout for Seniors.

What to track during the 1- to 21-day window

The incubation window is wide enough that a caregiver may need to watch for more than a weekend. CDC gives the typical onset as 3 to 5 days after exposure, with a range of 1 to 21 days. [2]

A simple note on paper is enough: “Monday: mowed near shed; dead rabbit seen. Wednesday: tired, temp 99.6, skipped dinner. Thursday: fell getting to bathroom, confused about day, cough started.” That kind of timeline can change the quality of the medical conversation.

When to call the doctor promptly

Call the older adult’s doctor, clinic, or local health advice line promptly if there was possible tularemia exposure and any new concerning symptom appears, especially fever or chills, swollen lymph nodes, a skin ulcer, sudden weakness, unusual fatigue, confusion, a new fall, cough, chest pain, or shortness of breath.

Do not make the receptionist or triage nurse discover the exposure by accident. Say it early: “I’m calling because my father may have been exposed to tularemia. He was gardening after a dead animal was found near the shed, and now he is weak and confused.”

Tularemia is treated with antibiotics, and CDC clinical guidance says prompt antibiotic treatment is highly effective. CDC also notes that treatment considerations for geriatric patients do not differ from the general population, although clinicians should review polypharmacy and potential drug interactions. [5]

That is the reason to call early. The goal is not to diagnose tularemia at the kitchen counter. The goal is to get the exposure and symptom pattern in front of someone who can decide whether testing, antibiotics, imaging, or in-person evaluation is needed.

When to call 911 or seek emergency care

Use emergency care for red flags, not because you are certain the illness is tularemia. Cleveland Clinic lists urgent warning signs that include fever over about 103°F, confusion, trouble breathing, lightheadedness or fainting, and stiff neck. [6]

• Call 911 now if the person is having trouble breathing, has blue or gray lips, cannot speak normally because of breathlessness, or has chest pain with distress.
• Call 911 now for severe confusion, inability to wake normally, fainting, repeated near-fainting, or a sudden major change in alertness.
• Call 911 now after a fall if there may be head injury, the person cannot get up safely, has new weakness on one side, has severe pain, or takes blood thinners and hit their head.
• Seek emergency care for a stiff neck, very high fever, worsening weakness, or rapidly worsening illness.

If you are unsure whether the person is safe to transport by car, call emergency services. A fall plus confusion plus possible infection is not the time to prove that everyone can manage the stairs.

How serious is tularemia?

Tularemia deserves respect, but panic does not help. Cleveland Clinic describes mortality as about 1% with prompt treatment and 10% to 50% without treatment, depending on the type of infection. Those untreated figures should be understood as broad, historical, manifestation-dependent estimates rather than a prediction for one older adult today. [6]

The more useful home lesson is narrower: delayed recognition can happen because the illness resembles other infections or because the first signs are nonspecific. The Minnesota cases make that concrete; in three of five, the diagnosis was not made until after hospital discharge. [3]

If heat, dehydration, or outdoor exertion may also be involved, track those possibilities too. Older adults can fall for more than one reason at once. For a separate checklist on heat-related dizziness and fall risk, see the Heat Wave Safety Checklist for Seniors.

What to say to the clinician

When you call, lead with the facts that are easiest to lose in a busy medical conversation:

• “Possible tularemia exposure” and what it was: tick, deer fly, mowing, gardening, dead or sick animal, animal handling, or untreated water.
• When it happened, even if the date is approximate.
• The temperature and how it compares with the person’s usual baseline.
• Any new weakness, lethargy, confusion, unusual sleepiness, or behavior change.
• Any new fall, near-fall, dizziness, fainting, or balance change.
• Any cough, chest pain, shortness of breath, stiff neck, severe headache, sore throat, vomiting, diarrhea, abdominal pain, swollen lymph nodes, or skin ulcer.
• Current medications, allergies, and whether the person has kidney disease, immune suppression, or other major medical conditions.

A mild fever should not erase the rest of the story. Neither should the sentence “he’s probably just tired.” In an older adult, the safest next step is not self-diagnosis; it is fast recognition, careful tracking, and clear communication that connects exposure with the non-classic changes you are seeing.

Medical note: This article is for caregiver education and is not medical advice. If symptoms are severe, rapidly worsening, or you are worried about breathing, confusion, fainting, or injury after a fall, seek urgent medical care.

References

1. 5 Surprising Signs of an Infection in Older Adults, AARP, 2025
2. Signs and Symptoms of Tularemia, CDC
3. Notes from the Field: Increase in Human and Animal Tularemia Cases — Minnesota, 2024, MMWR
4. First Human Case of Tularemia Confirmed in Boulder County in 2024, Boulder County Public Health
5. Clinical Care of Tularemia, CDC
6. Tularemia: Causes, Symptoms, Treatment & Prevention, Cleveland Clinic