Opossums are resistant to rabies and rarely carry the disease. Opossums become dangerous with their ability to transmit diseases to pets and people. According to the CDC , opossums, while rare, do have the ability to carry some diseases. Opossums are rarely dangerous. Opossums can threaten the livestock and crops on a farm. Diet.
Known to carry leptospirosis, tuberculosis, coccidiosis, spotted fever, tularemia, and other diseases, the pesky creatures pose serious health threats when they invade urban environments. Possums are more likely to feel vulnerable when they are alone as compared to in groups.

On one hand, having opossums around can be beneficial because they are known to eat harmful insects and annoying pests such as cockroaches, rats and snakes. But usually they will not harm your pet. Are opossums dangerous? The Dangers of Opossums On Farms. Opossums co actually have a full mouth full of sharp teeth and may bear their teeth if threatened. Opossums aren't strong enough to pose a danger to most pets.
That said, in rare instances, opossums will attack, particularly when they have to defend themselves, just like any other animal would. In this case, a possum is dangerous to a dog or any other pet, like a cat. They are solitary animals, slow moving, and usually very docile. In fact, a single opossum can eat up to 5,000 ticks a year, as found by the Environmental Institute of Houston. The primary sources of sustenance are small... Disease. Yes, opossums are considered to be dangerous because of the large variety of diseases that they carry and can transmit. What Do Possums Eat and Are They Dangerous? So if your dog messes with a possum, and the possum doesn't play dead, it might bite back. Opossums are omnivores and survive by eating a variety of foods. Cats and dogs are likely to avoid or even... Bites. If that is so, then possums are certainly dangerous to your pets. Dangers to Pets.