Is Your Furry Friend Harboring Hidden Health Risks? What Pet Owners Need to Know

For many of us, our pets are more than just animals—they’re cherished members of the family.

We share our homes, our hearts, and sometimes even our beds with these furry companions. But could we also be sharing something far less warm and fuzzy?

A new study from the University of Lisbon suggests that our beloved cats and dogs may be carrying and potentially spreading antibiotic-resistant bacteria to their human owners.

Now, before you start giving Fido the side-eye or banishing Sparky from your lap, let’s take a closer look at what this research really means—and what you can do to keep your whole family, two-legged and four-legged alike, healthy and happy.

First, a quick refresher on antibiotic resistance.

When bacteria are exposed to antibiotics, some of them can develop resistance, meaning the drugs that once killed them no longer work. These superbugs can cause infections that are much harder, and sometimes impossible, to treat.

It’s a growing global health threat that claims over a million lives each year. And while we often think of it as a human problem, the truth is, antibiotic resistance can affect animals too—including our pets.

In the University of Lisbon study, researchers tested cats, dogs, and their owners in Portugal and the UK for a family of bacteria called Enterobacterales that had become resistant to common antibiotics. The results were eye-opening.

In Portugal, over half of the pets and a third of the owners carried bacteria resistant to cephalosporins, a critical class of antibiotics used to treat serious infections. Even more concerning, one dog harbored a strain resistant to carbapenems, often considered a last-resort antibiotic.

In the UK, the numbers were lower but still significant, with over a third of dogs and an eighth of owners carrying cephalosporin-resistant bacteria.

But here’s the kicker: genetic analysis revealed that in several households, the resistant bacteria in the pet and owner were the same strain. This strongly suggests that the bacteria were transmitted between them, and in some cases, the timing of the positive tests hinted that the transmission went from pet to human.

Now, before you start giving your furry friend the cold shoulder, it’s important to keep this information in perspective.

Our pets bring us immense joy and companionship, and the benefits of having an animal in your life far outweigh the risks.

That said, there are steps you can take to minimize the chances of swapping germs with your pet:

• Practice good hygiene. Always wash your hands thoroughly after handling your pet, their food, or their waste.
• Keep your pet clean and well-groomed. Regular baths and brushing can help reduce the bacteria on their coat.
• Stay up-to-date on your pet’s check-ups and vaccinations. A healthy pet is less likely to carry or transmit harmful bugs.
• If your pet is prescribed antibiotics, follow the instructions carefully and complete the full course, even if they seem better.
• If you or your pet are immunocompromised or have open wounds, be extra cautious about close contact.

Remember, the goal isn’t to create fear or distance between you and your furry friend, but rather to promote awareness and good habits that keep everyone in your household—human and animal alike—in tip-top shape.

So go ahead, give your loyal companion an extra snuggle today. Just be sure to wash your hands afterwards.

Rachel Mace
Managing Editorial Director, e-Alert
with contributions from the research team

P.S. Pets: True LIFESAVERS? (Surprising!)

Sources:

https://studyfinds.org/antibiotic-bacteria-passing-from-dogs-cats-to-owners/