At a Glance
- A healthy dog in the San Fernando Valley tested positive for raccoon roundworm eggs during a routine exam.
- The parasite, found in raccoon feces, can cause lethargy, vomiting, neurological damage, and seizures in dogs.
- This is the first formally reported detection of Baylisascaris eggs in a domestic dog in Los Angeles County.
- Why it matters: Quick cleanup of pet waste and raccoon-proofing yards can stop eggs from becoming infectious and protect both pets and people.
Los Angeles County health officials are urging dog owners to act fast after a routine veterinary check revealed raccoon roundworm eggs inside a healthy San Fernando Valley dog.
First Confirmed Case in County
The LA County Department of Public Health received the report after the domestic dog underwent a standard veterinary exam.
Health authorities confirmed this marks the first formally reported detection of Baylisascaris-commonly called raccoon roundworm-eggs in a dog anywhere in the county.
What Raccoon Roundworm Does
Raccoon roundworm is a parasite whose eggs are commonly shed in raccoon feces. When dogs ingest those eggs they can develop:
- Lethargy
- Vomiting
- Diarrhea
In severe infections the parasite triggers neurological problems:
- Loss of coordination
- Paralysis
- Seizures
Human Risk Remains Extremely Low
Health officials stress that people face extremely low risk from this case. Investigators examined only two human infections in 2024, underscoring the rarity of person-to-person transmission.
Prevention Steps for Pet Owners
Public health officials issued clear guidance to curb spread:
Daily cleanup
- Remove dog feces from yards, parks, and public spaces every day.
- Eggs need two to four weeks in the environment to become infectious, so quick disposal blocks the risk before it starts.
Raccoon deterrents
- Secure trash-can lids.
- Never leave pet food or water bowls outdoors overnight.
- Clear fallen fruit or birdseed that could attract wildlife.
Immediate removal
- If raccoon droppings appear on patios or lawns, discard them promptly using gloves and sealed bags.
Broader Surveillance Efforts
County teams continue to monitor both wildlife and domestic animals for Baylisascaris. Veterinarians who encounter suspected cases must report them so investigators can map potential hotspots and issue timely alerts.
Key Takeaways
- One local dog’s routine exam revealed raccoon roundworm eggs, the county’s first confirmed canine case.
- Fast feces removal and wildlife-proofing yards prevent eggs from maturing into an infectious stage.
- Although human infections are rare, consistent pet-waste cleanup protects entire neighborhoods.
- Owners should watch dogs for lethargy, vomiting, or neurological changes and seek veterinary care if symptoms emerge.
