Can rats get other rats sick?

Author: Dr. Rodrigo Nitzsche DDS  |  Last update: Friday, April 10, 2026

The diseases may be transmitted between rats by several routes, depending on the organism, including direct contact with infected animals, contaminated feces, or sneezing or coughing.

Are rats respiratory infections contagious?

While upper respiratory infections are not contagious to people, they are very contagious between rats. Always wash your hands well after handling a sick rat to prevent spreading disease to other rats. Keep the cage clean and avoid using wood-based bedding as it can harbor and grow bacteria.

How do rats spread disease?

Rodent droppings, urine, and saliva can spread by breathing in air or eating food that is contaminated with rodent waste. Rodents can also carry ticks, mites, or fleas that can spread diseases. Many diseases do not cause any apparent illness in rodents.

How to tell if your rat has a respiratory infection?

Specific clinical signs related to respiratory diseases are nasal discharge, ocular discharge, dyspnoea, sneezing, head tilt, wheezing and rattling. Open mouth breathing only develops during very severe disease as rats are obligate nasal breathers.

What are the symptoms of rat fever?

Initial symptoms of S. moniliformis are non-specific and include fever, chills, myalgia, headache, and vomiting. Patients may develop a maculopapular rash on the extremities around 2 to 4 days after fever onset. 50% of patients then develop polyarthritis.

Rodent Infestations and Health Issues - Health Checks

How do rats act when they are sick?

These all lead to similar signs, such as sneezing, sniffling, labored breathing, rough hair coat, inactivity, weight loss, lack of appetite, and discharge from the eyes or nose. If you notice any of these signs, you should take your rat to the veterinarian.

What are the symptoms of viral fever?

Symptoms of Viral Fever
  • High Fever: Typically above 100.4°F (38°C) and often accompanied by chills.
  • Fatigue and Weakness: Persistent tiredness, even after adequate rest.
  • Body Aches: Muscle and joint pain, sometimes severe, as seen in dengue fever.
  • Headache: Intense pain that may affect concentration.

What does a sick rat sound like?

Wheezing in rats sounds similar to wheezing in humans; it's a whistling noise in the breathing. While wheezing often does happen when your rat is rattling, they don't always go together. This noise is usually a symptom of a new respiratory infection, or sometimes it can be linked to a mycoplasma flare.

What are the symptoms of the rat virus?

The early symptoms of RBF can be like the flu. If you were infected by contact with rodents in North America, symptoms usually include fever, vomiting, headache, and muscle pain. About half of people will also have joint pain or swelling, and 3 in 4 will develop a rash.

How to care for a sick rat?

Emergency / Critical Care
  1. Provide your rat with soft bedding such as a towel or blanket.
  2. Keep your rat in a warm, dark, and quiet area.
  3. Keep your rat as calm as possible and contact a veterinarian or local animal emergency clinic immediately.

What are the first symptoms of hantavirus?

In most recorded cases, symptoms develop 1 to 8 weeks after exposure. Early symptoms, such as fever, dry cough, body aches, headaches, diarrhea and abdominal pain, are similar to many other viral illnesses. This may prevent an HPS diagnosis before the illness progresses.

Can a dead rat spread disease?

Rat-bite Fever: This disease may be transmitted through a bite, scratch or contact with a dead rat. Salmonellosis: Consuming food or water that is contaminated by rat feces bacteria can cause this disease.

What are the signs of leptospirosis?

Symptoms of leptospirosis may include:
  • high temperature.
  • headache.
  • body aches and pain.
  • tummy ache.
  • feeling sick or being sick.
  • diarrhoea.
  • redness in the white part of your eyes.
  • yellowing of the skin (which may be harder to see on black or brown skin) or white part of the eyes (jaundice)

How to humanely euthanize a rat?

Without pre-charging the chamber, place the animal(s) in the chamber and introduce 100% CO2 at a fill rate of 30-70% displacement of the chamber volume per minute with CO2, added to the existing air in the chamber.

How often should I clean my rat cage?

Droppings, uneaten food and soiled areas of bedding should be removed from your pets' cage every day. Clean the cage completely twice a week by replacing dirty bedding and scrubbing down the rest of the cage with warm, soapy water. High-quality rat blocks should be available to your pet at all times.

What can I give my rat for a respiratory infection?

Antibiotics commonly used include doxycycline, enrofloxacin, azithromycin and amoxycillin-clavulanic acid. Anti-inflammatories Anti-inflammatory drugs are used to control any inflammation that may be occurring in your rat's airway. This is common in early respiratory disease or sometimes in relapses of clinical signs.

How to disinfect after rats?

Step 1: Put on rubber or plastic gloves. Step 2: Spray urine and droppings with bleach solution or an EPA-registered disinfectant until very wet. Let it soak for 5 minutes or according to instructions on the disinfectant label. Step 3: Use paper towels to wipe up the urine or droppings and cleaning product.

How long can a rat live with a respiratory infection untreated?

CRD is the best-understood multifactorial respiratory infection in rats. M pulmonis is the major component of CRD, and the disease is also known as murine respiratory mycoplasmosis. Rats with CRD rarely live >2 years.

Do all rats carry hantavirus?

What animals can give people hantaviruses? Only some kinds of mice and rats can give people hantaviruses that can cause HPS. In North America, they are the deer mouse, the white-footed mouse, the rice rat, and the cotton rat.

How to tell if a rat is unwell?

You should regularly examine your rat for any general signs that might indicate illness, trauma, or the presence of disease. These include loss of appetite or weight, hunched posture, discharge from the eyes or nose, hair loss, matted or fluffed fur, signs of trauma (bites, wounds, limping), or general dullness.

What does a stressed rat sound like?

Stress or Discomfort

Stress within the colony may well be met with a hiss or a growl, but equally, rats are good at staying silent if they think a predator is in the vicinity. Teeth grinding, also called bruxism, indicates stress or discomfort but can also be a sign of contentment.

How long do pet rats live?

One thing to keep in mind is that rats have a relatively short life, especially when compared to other pets such as dogs and cats. On average, pet rats can live for around 2-3 years, although some may live up to 4-5 years with proper care.

How to tell if it's viral or bacterial?

How do you tell if a disease is viral or bacterial? Viruses and bacteria can cause similar symptoms, like fever, cough and rashes. The only way to know what kind of infection you have is to have a healthcare provider assess you. If you have symptoms that last more than a few days or that concern you, see your provider.

What are 5 common symptoms of a viral infection?

If it's a viral illness, typically symptoms are shorter lasting and classically the symptoms include fever, chills, sore throat, nasal congestion, runny nose, cough, and a lot of times you can have some body aches. A lot of times the symptoms last for maybe three days to a week and then slowly get better over time.

What are the symptoms of a hemorrhage?

Head: Sudden onset severe headache, vision changes, confusion and weakness on one side of your body. Chest: Difficulty breathing, chest pain and coughing up blood. Abdomen: Swelling or a feeling of fullness, abdominal bruising and bloody vomit, pee or poop.

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