Plague in Pets and People: What You Need to Know 🐾🦠

By Dr Duncan Houston

Quick Answer

Plague is a rare but serious bacterial infection spread mainly by fleas from infected rodents. Dogs and cats can become infected, and in some cases transmit it to people. The risk is low, but good flea control, avoiding wildlife exposure, and early veterinary care are key to prevention and safety.

When people hear “plague,” they think of history books. But the reality is that Yersinia pestis still exists in certain regions and can occasionally affect pets and humans.

The good news is that cases are uncommon, and with awareness and simple precautions, the risk can be kept very low.

🔬 What Is Plague?

Plague is caused by the bacterium Yersinia pestis.

It is primarily a zoonotic disease, meaning it can spread between animals and humans.

The bacteria are usually carried by:

🐀 Rodents
🦟 Fleas that feed on infected animals

🧫 The Three Forms of Plague

Bubonic Plague

The most common form.

🦠 Swollen lymph nodes (buboes)
🥵 Fever and lethargy

Septicemic Plague

Infection spreads through the bloodstream.

⚠ Severe illness
⚠ Can become life-threatening quickly

Pneumonic Plague

A rare but serious form affecting the lungs.

💨 Spread through respiratory droplets
⚠ Higher risk of transmission between animals and humans

📍 Where Is Plague Found?

Plague is rare but still present in certain regions.

It is most commonly reported in:

🌄 Rural and semi-rural areas
🐿 Regions with rodent populations
🌾 Areas where wildlife and domestic animals interact

The highest risk areas include parts of:

New Mexico
Arizona
Colorado
Texas

🐶 How Pets Become Infected

Dogs and cats can become infected through:

🦟 Flea bites from infected fleas
🐾 Contact with infected rodents or rabbits
🩸 Exposure to contaminated tissues or wounds
💨 In rare cases, inhalation of infected droplets

Cats are generally more susceptible than dogs and are more likely to develop severe disease.

🩺 Signs of Plague in Pets

Symptoms can vary depending on the form of infection.

Common signs include:

🥵 Fever
😴 Lethargy
🍽 Reduced appetite
🦠 Swollen lymph nodes (especially under the jaw)
🩹 Abscesses that may rupture

In more severe cases:

💨 Breathing difficulty
🩸 Signs of systemic illness

These signs can resemble other infections, so veterinary testing is important.

⚠️ Can Pets Transmit Plague to Humans?

Yes, although the risk is low.

Transmission may occur through:

🩸 Contact with infected wounds or discharge
🤧 Respiratory droplets (especially in pneumonic cases)

Cats are the most common source of transmission to humans in veterinary settings.

🛡️ How to Protect Your Pets and Yourself

🦟 Flea Control

This is the most important preventive step.

✔ Use vet-approved flea prevention regularly
✔ Treat all pets in the household
✔ Maintain a clean home and environment

🐀 Avoid Wildlife Exposure

Reduce contact with rodents and wild animals.

🚫 Do not allow pets to hunt wildlife
🚫 Avoid areas with rodent burrows
🧤 Handle dead animals with gloves only

🧼 Hygiene and Handling

If your pet is unwell:

🧤 Wear gloves when handling wounds or discharge
🚿 Wash hands thoroughly after contact
🧼 Clean contaminated surfaces

🚫 Avoid Contact With Dead Wildlife

Dead rodents or rabbits can be a source of infection.

📞 Report unusual wildlife deaths if required in your area
🐾 Prevent pets from interacting with carcasses

🩺 When to See Your Veterinarian

Seek veterinary care if your pet has:

🥵 Fever and lethargy
🦠 Swollen lymph nodes
🩹 Abscesses or unusual wounds
😴 Sudden illness after outdoor exposure

Early diagnosis allows for effective treatment and reduces the risk of spread.

🧠 Why Awareness Matters

Although plague is rare, it is important to recognise the risk in certain environments.

With modern veterinary care:

💊 Early treatment is often effective
🛡 Prevention is straightforward
🐾 Risk can be kept very low

Most pet owners will never encounter it, but awareness helps ensure quick action if needed.

🐾 Final Thoughts

Plague is still present in some regions, but it is far from a common everyday risk.

Simple steps such as flea prevention, avoiding wildlife exposure, and good hygiene make a significant difference.

For most households, especially with proper care, the risk remains very low.

Being informed means you can act quickly if needed while continuing to enjoy life with your pet confidently.

❓ FAQ

Is plague common in pets?

No. It is rare, even in areas where it exists.

Are cats or dogs more at risk?

Cats are more susceptible and more likely to develop severe disease.

Can humans catch plague from pets?

It is possible but uncommon. Proper hygiene greatly reduces risk.

What is the best prevention?

Consistent flea control and avoiding contact with wildlife.

If you want help monitoring your pet’s health, managing flea prevention, or getting advice about unusual symptoms, the ASK A VET™ app can help you stay organised and get veterinary guidance whenever you need it. 🐾📱