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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsYes. Cats and dogs can become infected with plague, a disease caused by the bacterium Yersinia pestis. Cats are especially susceptible and can become seriously ill; dogs are less likely to develop clinical illness but can still be infected or carry infected fleas into a home.
Protection is practical rather than vaccine-based: use veterinarian-selected flea control, keep pets from roaming and hunting, reduce rodents around the home, avoid handling dead wildlife, and call a veterinarian promptly after a plausible exposure or unexplained illness.
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What plague is and why a pet can matter to your household
Plague is an infection caused by Yersinia pestis. In nature, the bacterium circulates mainly among wild rodents. Infected fleas spread it when they bite another animal or person. A cat or dog can therefore be part of a chain that begins with wildlife and ends inside a home.
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The risk is geographically local. Plague persists in certain rodent and flea populations, and conditions can change from one county or season to another. If you live in or visit an area where plague occurs, use current advice from your state or local health department in addition to national guidance.
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A pet can expose people in several ways:
- An infected flea can hitchhike indoors on the animal and later bite a person.
- A pet can be infected after contact with a wild rodent, rabbit, other small mammal, or a carcass.
- A sick animal can expose a person through a bite, scratch, infectious fluid, or tissue.
- Close contact with respiratory material from an animal with pneumonic plague can create a more serious exposure.
These routes do not mean that every ordinary interaction transmits plague. Risk depends on the type and intensity of contact, whether fleas or infectious material were present, and whether the animal has a form of illness capable of producing respiratory spread.
Can cats get plague?
Yes, and cats are the pet species of greatest concern. The Centers for Disease Control and Prevention (CDC) states: "Cats are highly susceptible to plague and are a common source of infection in humans (owners and veterinarians)." Cats may become infected after hunting or eating an infected rodent, contact with a carcass, or exposure to fleas.
Swollen lymph nodes, often beneath the jaw, may occur in a cat with plague. That finding is not specific: dental disease, ordinary bacterial infections, wounds, and other conditions can also enlarge lymph nodes. A sign by itself cannot diagnose plague, so do not try to confirm or rule it out at home.
A cat that becomes ill after plausible wildlife, rodent, or flea exposure needs prompt veterinary attention. Tell the clinic about the exposure before you arrive. Staff may need to prepare for fleas, secretions, respiratory droplets, or contaminated tissues, and advance notice helps them protect other patients and personnel.
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Can dogs get plague?
Dogs can become infected, but they are less likely than cats to develop clinical illness. That lower likelihood is not immunity. A dog may still transport infected fleas into a house, have a silent infection, or become ill after substantial exposure.
Dogs can encounter the bacterium when they investigate carcasses, enter rodent burrows, chase wildlife, or spend time in areas with infected fleas. A dog that seems healthy can therefore still create a household flea risk. Keep the dog on an effective preventive program even when no symptoms are visible, and report unusual illness or a known exposure to a veterinarian.
| Pet | Clinical susceptibility | How it can affect people | Owner priority |
|---|---|---|---|
| Cat | Highly susceptible; serious illness is possible | Can be infected directly, carry infected fleas, or expose people through bites, scratches, fluids, tissues, or respiratory material in pneumonic illness | Prevent hunting and roaming, maintain flea control, and seek veterinary care quickly after exposure or illness |
| Dog | Less likely than cats to develop clinical illness, but not immune | Can become infected or carry infected fleas indoors | Use veterinarian-guided flea control and prevent wildlife contact and roaming |
How plague reaches pets and people
Flea bites
Infected fleas are a principal route of spread. A flea feeds on an infected wild animal, then bites a pet or person. Fleas can also be carried into the house on fur, bedding, or equipment. Because a single visible flea is evidence of exposure to a broader flea population, prevention must address both the pet and the environment.
Rodents, prey, and carcasses
Cats that hunt are at particular risk because they may bite, handle, or eat infected prey. Dogs can be exposed while investigating a dead animal or digging near a burrow. Do not pick up or touch dead wildlife. Contact your local health department for advice about safe disposal rather than moving the carcass yourself.
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Contact with a sick pet
A sick cat or dog may expose a person through a bite or scratch, infectious drainage, or contact with tissues. Respiratory exposure matters especially when an animal has pneumonic plague. Avoid close face-to-face handling of an ill animal until a veterinarian gives instructions. Routine petting is not automatically a plague exposure, but any contact involving fluids, wounds, bites, scratches, or respiratory secretions should be reported accurately to professionals.
Prevention steps that owners can use
1. Put flea control under veterinary direction
Ask your veterinarian which flea product fits the pet’s species, age, weight, health status, and other medicines. Follow the product label exactly; never substitute a product intended for another species or apply more than directed. CDC flea guidance recommends treating dogs and cats year-round to kill adult fleas and prevent new fleas from hatching. Your veterinarian can explain whether the home, bedding, and other animals also need treatment.
A flea comb is useful for inspecting fur and removing visible fleas. It is an inspection aid, not a replacement for a veterinarian-recommended preventive product. Comb over a light-colored surface so you can distinguish fleas or flea debris, and tell the veterinarian what you find.
2. Stop roaming and hunting
In areas where plague occurs, keep cats indoors and do not allow dogs to roam freely. Use a leash or secure enclosure outdoors. Prevent contact with wild and stray animals, including animals that appear weak, injured, or dead. These measures reduce opportunities for bites, scratches, prey handling, and flea transfer.
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3. Remove rodent shelter and food near the home
Make the area around the house less attractive to rodents. Clear brush, rock piles, cluttered firewood, junk, and other nesting sites. Store pet food and wild-animal food securely rather than leaving it outside overnight. Rodent-proof the house, garage, sheds, and other outbuildings by sealing openings and keeping doors closed when practical.
4. Keep high-risk items away from sleeping areas
CDC advises that free-roaming cats and dogs in plague-endemic areas should not sleep on their owners’ beds. This is an exposure-reduction measure, especially when an animal may have picked up fleas outdoors. It does not replace flea control or restrictions on roaming.
5. Do not handle dead animals
Keep pets and children away from carcasses. Do not touch, bag, or transport a dead rodent or other wild animal yourself. Ask the local health department how it wants the animal handled and whether testing or specialized disposal is appropriate.
6. Do not rely on vaccination in the United States
CDC states that a plague vaccine is no longer available in the United States. Current prevention therefore depends on flea control, exposure reduction, and prompt professional evaluation rather than vaccination.
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What to do if your pet may have been exposed
- Separate the situation from normal handling. Keep the pet away from other animals and avoid contact with wounds, drainage, saliva, respiratory secretions, or a carcass. Do not let the pet roam or sleep on beds while you wait for instructions.
- Call a veterinarian promptly. Explain exactly what happened: a dead or sick rodent, wildlife contact, hunting, a flea problem, a bite or scratch, or time spent in a known plague area. Mention when the contact occurred and whether anyone was bitten or scratched.
- Call before arriving. A clinic may direct you to a particular entrance, ask you to wait outside, or provide other instructions so staff can prepare protective measures and limit exposure to other animals and people.
- Do not diagnose or treat at home. Swollen lymph nodes or general illness have many possible causes. Do not start leftover antibiotics, flea chemicals, or other medicines without professional direction.
- Follow public-health instructions. When plague is suspected in a cat, CDC guidance calls for prompt notification of public-health officials. The veterinarian or health department may advise on testing, animal handling, flea control, and monitoring of household members.
Veterinary staff may use precautions because exposure can involve fleas, respiratory droplets, secretions, or tissues. Cooperate with requests about transport, containment, and information sharing; those steps protect both the clinic and your household.
What people in the household should do after significant exposure
If a person was bitten or scratched, handled infectious fluids or tissues, or had close exposure to a pet with suspected pneumonic plague, contact a healthcare provider and your local or state public-health department. Describe the animal exposure and the timing rather than waiting for symptoms to appear.
CDC advises watching health closely for two weeks after the last possible contact. Professionals may recommend post-exposure antibiotics when the type and duration of contact justify them. The decision is individual: do not self-start antibiotics or use a pet’s prescription.
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Ask the health department how to manage fleas in the home and whether other animals need examination. Keep a written timeline of contacts, flea findings, bites, scratches, and veterinary visits; accurate timing helps clinicians assess risk.
Recognizing the limits of symptoms and risk estimates
There is no single symptom that proves a pet has plague, and no universal household percentage that predicts an owner’s risk. The practical assessment depends on geography, flea activity, wildlife contact, the pet’s species, the nature of any illness, and the exact human contact.
CDC veterinary guidance was last updated May 15, 2024. Its public prevention page was last updated March 5, 2025. Those recommendations are practical safeguards, not a promise that every exposure can be prevented. Because local conditions change, check current notices from the relevant health department when plague is reported nearby or when you are unsure how to dispose of an animal.
Quick Recap
A quick owner checklist
- Keep cats indoors and dogs supervised in areas where plague occurs.
- Use year-round flea control selected and dosed by a veterinarian.
- Inspect with a flea comb if needed, but do not use combing as the sole preventive measure.
- Remove brush, rock piles, junk, cluttered firewood, and outdoor food that can support rodents.
- Seal openings in the home and outbuildings and keep pets away from burrows and carcasses.
- Do not touch dead wildlife; ask the local health department about disposal.
- Call a veterinarian before bringing in a pet that is ill after plausible exposure.
- Notify public-health officials when plague is suspected in a cat and seek medical advice after significant human exposure.
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