Recent reports of suspected tularemia cases in New York have brought renewed attention to tick-borne infections beyond the more commonly discussed Lyme disease. Often referred to as “rabbit fever,” tularemia is a rare but potentially serious bacterial infection that highlights the importance of year-round vigilance, proper tick prevention, and early clinical awareness.
While cases remain relatively rare, tick populations and geographical ranges have been shifting across North America due to milder winters and changing environmental patterns. Understanding how tularemia spreads, recognizing its symptoms, and knowing when to seek medical care are essential steps in keeping yourself and your family safe while enjoying the outdoors.
What Is Tularemia?
Tularemia is a zoonotic disease caused by the bacterium Francisella tularensis. The common name “rabbit fever” stems from its frequent association with wild lagomorphs (rabbits and hares) and rodents, which serve as natural reservoirs for the bacteria.
Unlike many other vector-borne illnesses that are transmitted strictly by a single mechanism, F. tularensis is remarkably versatile. Human transmission can occur through several distinct pathways:
- Vector bites. Bites from infected ticks — most notably the American dog tick (Dermacentor variabilis) and the Lone Star tick (Amblyomma americanum) — or biting deer flies.
- Direct contact. Handling infected animal tissues or fluids, particularly during activities like hunting, skinning, or dressing wild game.
- Ingestion. Consuming undercooked meat from an infected animal, or drinking contaminated water.
- Inhalation. Inhaling dust or aerosols contaminated with the bacteria (e.g., during landscaping, farming, or brush clearing).
Importantly, tularemia does not spread from person to person. You cannot catch it from casual contact with an infected individual.
Key Symptoms and Clinical Presentation
Symptoms typically manifest between 3 to 5 days after exposure, though the incubation period can range anywhere from 1 to 21 days. The presentation often depends on how the bacteria entered the body:
- Ulceroglandular form (most common). Following a tick or fly bite, a painful skin ulcer usually forms at the site of the bite. This is accompanied by regional swollen and tender lymph nodes, high fever, chills, body aches, headache, and severe fatigue.
- Glandular form. Similar to the ulceroglandular type, characterized by fever and swollen lymph glands, but without the development of a visible skin ulcer.
- Oculoglandular / oropharyngeal forms. Occur when bacteria enter through the eyes (causing conjunctivitis and swollen preauricular nodes) or via ingestion (causing sore throat, mouth ulcers, tonsillitis, and abdominal pain).
- Pneumonic / systemic forms. Inhalation or untreated localized infection can lead to severe pulmonary complications or progression into the bloodstream, potentially leading to sepsis — a life-threatening systemic response.
Diagnosis and Treatment
Early identification is crucial for effective management. Because early symptoms resemble those of the flu or other tick-borne infections, it is vital to inform your healthcare provider if you have had recent tick exposure, outdoor activities, or contact with wild animals.
Tularemia responds well to specific prescription antibiotics (such as gentamicin, streptomycin, doxycycline, or ciprofloxacin) when treatment is initiated early. While a vaccine was historically available for high-risk laboratory personnel, it is currently under regulatory review and is not available for general public use. Prevention remains the primary defense.
Evidence-Based Prevention and Outdoor Safety
Preventing tick bites and minimizing exposure to wild animal reservoirs are the most effective ways to avoid tularemia and other vector-borne diseases.
- Dress for protection. Wear light-coloured clothing to make ticks easier to spot before they reach your skin. Opt for long pants, long-sleeved shirts, and closed-toe shoes, and tuck your pant legs into your socks when walking through brush or tall grass.
- Stay on cleared trails. Walk in the center of maintained, well-travelled paths, and avoid direct contact with dense brush, leaf litter, low-hanging foliage, and sitting directly on logs or stone walls.
- Use effective repellents. Apply Health Canada / EPA-registered insect repellents containing DEET or Icaridin (Picaridin) to exposed skin and clothing according to label instructions. Consider treating outdoor clothing and gear with permethrin where approved for personal use. Always wash off topical repellents upon returning indoors.
- Practice safe animal handling. When dressing or skinning wild game, always wear thick protective gloves, and cook all wild meat thoroughly to safe internal temperatures before consumption.
- Perform daily tick checks and proper removal. Check yourself, children, and pets immediately after returning from outdoor areas. Use fine-tipped tweezers to grasp the tick as close to the skin’s surface as possible, and pull upward with steady, even pressure without twisting or squeezing the body. Clean the bite site thoroughly with rubbing alcohol or soap and water, and monitor the area and your overall health for 30 days.
When to See a Healthcare Provider
If you experience a high fever, an unexplained skin sore, swollen lymph nodes, or persistent flu-like symptoms following outdoor activity or animal exposure, contact your primary care clinic right away. Early diagnosis allows for targeted antibiotic therapy, reducing the risk of complications and supporting a smooth recovery. If you’re planning outdoor travel or activities in areas with active tick populations, a pre-travel consultation at Destinations Travel & Immunization Clinic can help you plan appropriate precautions for your destination.
Stay Connected with Destinations Travel and Immunization Clinic! healthytrip.ca/travel-blog
Because Your Health Doesn’t Take a Vacation — Even When You Do.
If you found this article helpful, don’t forget to like, share, and Follow to stay up to date on our latest travel health tips, updates, and wellness advice.
The medical information on this site is provided as an information resource only and is not to be used or relied on for any diagnostic or treatment purposes. This information does not substitute for professional diagnosis and treatment. Please do not initiate, modify, or discontinue any treatment, medication, or supplement solely based on this information. Always seek the advice of your health care provider first. Full Disclaimer
As Canada Day approaches, we at Destinations Travel Clinic would like to take a moment to express our heartfelt gratitude and appreciation to the wonderful community that has supported us over the years. It is also a time to reflect on the incredible opportunities and privileges that come with living in this beautiful country. Join us as we celebrate this special day and acknowledge the support of our local family, as well as the countless opportunities Canada has to offer.
y, the first of several potential vaccines in the pipeline for RSV to be licensed anywhere.