Can Cats Contract or Spread Hantavirus? What Pet Owners Should Know

Can Cats Contract or Spread Hantavirus?

The recent outbreak aboard the MV Hondius has raised many questions about hantavirus. If you own a cat—or any pet—it’s natural to wonder whether your animal could contract or transmit the virus.

The short answer: there is no evidence that cats, dogs, or common pet rodents can become sick from hantavirus or pass it to their human families.

What Happened on the MV Hondius?

The MV Hondius, sailing from Argentina to Antarctica, has been linked to 11 confirmed hantavirus cases among passengers. Three fatalities, including a Dutch couple, have been reported. Remaining passengers were evacuated to their home countries, while 18 Americans were quarantined in Nebraska. The exact number of active cases remains uncertain.

Understanding Hantavirus

Hantavirus is a group of viruses primarily transmitted to humans via contact with the droppings, urine, or saliva of wild rats and mice. Infection typically occurs when inhaling dust contaminated by these excretions, such as during cleaning of infested sheds or attics. In the United States, fewer than 1,000 cases have ever been reported.

Symptoms and Severity

The virus has a long incubation period—up to eight weeks—before symptoms appear. Early signs include fever, headaches, and muscle aches. If the infection progresses to Hantavirus Cardiopulmonary Syndrome (HCPS), patients may develop shortness of breath, coughing, pulmonary edema, heart failure, and shock. Fatality rates vary by strain; the Andes virus strain involved in the cruise ship outbreak has a documented fatality rate of up to 50%.

Which Strain Was Involved?

Genetic sequencing identified the Andes virus, first described in 1995 in Argentina. The strain remains most common in Argentina and Chile. Notably, the Dutch couple who died had traveled in Argentina before boarding the ship.

Is a Pandemic Likely?

Unlike COVID‑19, most hantavirus strains spread only from rodents to humans. The Andes strain is an exception, capable of person‑to‑person transmission. However, it requires prolonged, close contact—such as caregiving or sharing a bed—to spread. Even with the Andes virus, the risk of a global outbreak is extremely low.

Treatment Options

No antiviral medication is currently approved for hantavirus. Care focuses on supportive measures: supplemental oxygen, intravenous fluids, mechanical ventilation, and in severe cases, extracorporeal membrane oxygenation (ECMO), which mimics heart and lung function.

Can Pets Contract Hantavirus?

Cats and dogs can be exposed to hantavirus when hunting rodents, but they rarely exhibit symptoms and typically recover without issue. There is no diagnostic test for hantavirus in domestic pets, and no evidence that hamsters, guinea pigs, or gerbils spread the virus.

Can Pets Spread Hantavirus to Humans?

No. Even if a cat were infected, it would not transmit the virus to people. The only theoretical risk is if a pet brings a rodent indoors, which could then carry the virus. Keeping cats indoors and practicing good hygiene—wearing gloves and a mask when handling rodent carcasses, followed by thorough handwashing—remains good practice.

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Dawn LaFontaine

Dawn LaFontaine is a lifelong animal lover who brings a touch of whimsy to her keyboard. Her blog, Kitty Contemplations, helps cat guardians understand and care for their feline companions. It is a Top 10 cat blog on Feedspot. Dawn also runs Cat in the Box, a company that sells award‑winning cat products designed to meet cats’ natural needs.

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References

• ABC7 Chicago: “Can I Get Hantavirus from My Pet? Here’s What Pet Owners Should Know.”
• Washington State Department of Health: Hantavirus
• Paediatrics & Child Health: “Healthy Pets, Healthy People: How to Avoid the Diseases That Pets Can Spread to People.”
• Today.com: “Will the Hantavirus Outbreak Cause a Lockdown? What Experts Want You to Know.”
• NPR: “What to Know about the Hantavirus Outbreak on Transatlantic Cruise.”
• European Centre for Disease Prevention and Control: “Questions and Answers on the Hantavirus Outbreak in a Cruise Ship.”