Opossums are a common sight throughout Green Bay and the surrounding Wisconsin areas. These nocturnal marsupials are often seen rummaging through garbage, wandering around yards, or hiding under decks and sheds. While their appearance may startle some homeowners, the real concern often comes down to one question: Do opossums carry disease, and should you be worried if one is on your property?
Are Opossums Dangerous?
Opossums are not typically aggressive animals. In fact, they are known for their “playing dead” defense mechanism rather than attacking when threatened. However, like any wild animal, they can pose health risks—particularly when they take up residence near homes.
Common Diseases Carried by Opossums
Opossums can carry a variety of diseases and parasites that may affect humans and pets, although actual transmission is relatively rare with proper precautions. Some of the most notable include:
Leptospirosis: This bacterial disease can be transmitted through contact with opossum urine, especially if it contaminates water or soil. Humans and pets can contract it through broken skin or mucous membranes.
Salmonella: Like raccoons and rodents, opossums can carry salmonella, typically spread through feces.
Tuberculosis: Opossums are known to carry bovine tuberculosis in some regions, although this is extremely rare in Wisconsin.
Fleas, Ticks, and Mites: Opossums often host parasites that can transmit diseases such as Lyme disease, murine typhus, and other illnesses to humans and pets.
Coccidiosis and Toxoplasmosis: These are parasitic infections that can be picked up by pets that come into contact with contaminated opossum feces.
Are Opossums a Rabies Risk?
One common myth is that opossums frequently carry rabies. In reality, opossums have a very low body temperature, which makes it difficult for the rabies virus to survive and replicate. While it’s not impossible, rabies in opossums is extremely rare.
Signs of Opossum Activity Around Your Home
If you suspect an opossum is nearby, look for these signs:
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Noises at night (scratching, rustling, or hissing)
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Overturned garbage cans or compost bins
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Droppings near sheds, porches, or crawlspaces
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Visible burrows or access points under structures
They may also take shelter in attics, basements, or garages if given access.
What Homeowners Should Do
If you encounter an opossum on your property, it's best not to approach or attempt to remove it yourself. While the risk of disease transmission is generally low, handling or cornering any wild animal can be dangerous.
To reduce the chances of attracting opossums, start by securing your trash bins and avoiding leaving pet food outside, as these are common attractants. Inspect your home’s foundation and roofline for any potential entry points, such as gaps or broken vents, and seal them appropriately. Keeping your yard clean and free of brush, fallen fruit, or other debris will also help discourage wildlife from nesting nearby. If you believe an opossum has taken up residence or you're unsure how to proceed, it’s always safest to contact a professional wildlife control service to handle the situation humanely and effectively.
Trust Critter Control of Green Bay
At Critter Control of Green Bay, we specialize in humane wildlife removal and prevention. If you're dealing with an opossum—or suspect one may be living too close for comfort—our trained technicians can assess the situation, remove the animal safely, and help you protect your home from future wildlife intrusions.
Don't let an opossum put your health or peace of mind at risk. Contact us today for a free inspection and expert help in keeping your home wildlife-free.