Groundhogs look harmless, and most of the time they mind their own business. But they can carry a few diseases that are worth knowing about if you have them in your yard, especially if you are planning to trap or handle one.
The good news first: the serious diseases are rare, and they are easy to avoid with a few basic precautions. The routes are the ones CDC lists for wildlife generally: a bite or scratch for rabies, urine and wet soil for leptospirosis, and the fleas and ticks that any burrowing animal brings with it. Most of the risk comes from direct contact with the animal, its droppings, or its urine. Keep your hands off, and you have already removed most of the danger.
Here is what groundhogs can carry and how each one is actually spread.
Rabies
Rabies is a virus that attacks the nervous system, and it is almost always fatal once symptoms show up. Groundhogs can carry it, though they are a long way down the list of reported cases: in state surveillance tables groundhogs barely appear next to raccoons, skunks, foxes and bats, which are the species that fill the reports year after year
A healthy groundhog is shy and will run from you. A rabid one acts wrong: it may seem unafraid, wander during the day, drool, stagger, or act aggressive. If you see a groundhog behaving like that, leave it alone and call animal control.
Rabies spreads through saliva or nervous tissue, usually a bite. A scratch can do it too if the claws have saliva on them. The virus does not survive long outside a body, so touching dirt or grass where a rabid groundhog was is not a real risk. If you are ever bitten, wash the wound with soap and water and see a doctor right away. The rabies shots work if you get them before symptoms start.
Leptospirosis
Leptospirosis is a bacterial disease that groundhogs can shed in their urine. The bacteria survive in water and wet soil for weeks, and people or pets get infected through cuts, the eyes, nose, or mouth, or by drinking contaminated water.
In people it usually looks like a bad flu at first: fever, headache, muscle aches. Severe cases can damage the kidneys or liver. Dogs are the bigger worry, since they sniff and drink everything. A dog can pick it up from a puddle or a patch of dirt a groundhog used as a bathroom.
The fix is prevention: keep pets away from groundhog areas, do not let them drink standing water, and ask your vet about the leptospirosis vaccine if your dog spends a lot of time outdoors.
Tularemia
Tularemia, sometimes called rabbit fever, is another bacterial disease carried by rodents including groundhogs. People get it from tick bites, from handling an infected animal, or from breathing dust that has the bacteria in it.
Symptoms depend on how you got it. A tick bite usually means a skin ulcer and swollen lymph nodes. Breathing it in means a bad respiratory infection. It is treatable with antibiotics, but it needs to be caught early, so do not shrug off a strange sore or a fever after you have been poking around a burrow.
Groundhog burrows are tick magnets. The ticks that feed on groundhogs can also pass other diseases to you and your pets, which makes tick protection part of any groundhog job.
Fleas, ticks, and mites
Groundhogs carry the usual roster of hitchhikers. Fleas off a groundhog can carry plague in a few western areas, though it is rare. Ticks are the bigger deal, since they spread Lyme disease and a few other infections. Mites can cause mange on the groundhog itself, and while those mites do not really set up shop on humans, they can cause a short bout of itchy skin if you handle the animal.
When you work near a burrow, wear long pants and closed shoes, tuck your pants into your socks, and use an insect repellent. Check yourself for ticks when you are done.
Beyond disease: the other risks
Groundhog burrows are a physical hazard on their own. A hidden hole in the yard trips kids, older adults, and livestock. And an empty burrow does not stay empty, opossums, rabbits, raccoons, and snakes will happily move in, bringing their own problems with them.
Droppings and urine can also get into garden soil. Wash anything you grow thoroughly, especially root vegetables and leafy greens you eat raw.
Frequently Asked Questions
Yes, but it is uncommon. Groundhogs are a small part of wildlife rabies cases compared to raccoons, skunks, and bats. Any groundhog that bites or scratches someone should be tested, and you should avoid any groundhog acting strangely.
Yes. Leptospirosis from their urine is the biggest one, along with tularemia, fleas, and ticks. Keep your dog’s shots current, ask about the lepto vaccine, and use flea and tick prevention.
They can carry bacteria and parasites. Avoid direct contact, wear gloves and a mask when cleaning up waste, and wash your hands afterward.
Wash everything well first. Groundhog urine and droppings can contaminate soil and produce, with root vegetables and leafy greens the highest risk. Growing in raised beds with a barrier underneath is the cleanest fix.
