The Health Risks of
Dog Waste for
Children and Pets

Published: June 2026  |  By: A1 Scoop Warriors  |  Reading time: ~7 minutes

For most Fort Worth families, the backyard is where kids run loose, where the dog patrols the fence line, and where summer evenings happen. It's also, if waste isn't removed consistently, a low-level health hazard that's easy to underestimate because the risks are largely invisible.

Dog feces isn't just unpleasant. It contains live pathogens — parasites, bacteria, and viruses — that can make children and other pets sick. The risks are manageable with regular cleanup, but they don't go away on their own. Here's what Fort Worth families with dogs need to understand.

Parasites in Dog Waste

Roundworms (Toxocara canis)

Roundworms are the most common intestinal parasite in dogs and one of the most serious zoonotic (animal-to-human) health risks from dog waste. Infected dogs shed roundworm eggs in their feces. Those eggs are not immediately infective — they need 2–4 weeks in the environment to develop into infective larvae, which is exactly why regular, frequent waste removal matters so much.

Once larvae develop, they can survive in soil for months to years. Children playing in contaminated soil who put their hands in their mouths can ingest larvae. Most infections in healthy children are mild or asymptomatic, but in some cases larvae migrate through body tissues in a condition called visceral larva migrans. In rare cases, larvae reach the eyes (ocular larva migrans), causing inflammation and potentially permanent vision impairment. The CDC estimates that 14% of Americans have antibodies indicating past Toxocara exposure.

Hookworms (Ancylostoma)

Hookworm larvae in contaminated soil can penetrate skin directly — no ingestion required. Children playing barefoot or sitting on contaminated soil are at risk. The resulting condition, cutaneous larva migrans, causes intensely itchy, winding tracks under the skin as larvae migrate. While typically self-limiting, it requires treatment and is entirely preventable through regular waste removal.

Giardia

Giardia is a single-celled protozoan parasite that dogs can shed in large quantities in their feces. It's transmissible to humans and causes gastrointestinal illness — diarrhea, nausea, abdominal cramps, and fatigue that can last several weeks. Children are more susceptible than adults to both infection and symptomatic illness. Giardia cysts can survive in moist soil and on surfaces for months.

Cryptosporidium

Another protozoan parasite shed in dog feces, Cryptosporidium causes gastrointestinal illness in humans similar to Giardia. It's particularly dangerous for immunocompromised individuals — including children undergoing cancer treatment, elderly family members, or adults with immune-affecting conditions.

Bacteria in Dog Waste

Dog feces contains multiple bacterial species capable of causing human illness:

• E. coli (certain strains): Pathogenic strains present in dog waste cause gastrointestinal illness. Transmission occurs via contaminated soil, surfaces, or water.
• Campylobacter: One of the most common causes of bacterial diarrhea in the US. Dogs can be carriers without symptoms. Human infection typically causes bloody diarrhea, cramping, and fever lasting up to 10 days.
• Salmonella: Dogs can carry and shed Salmonella without appearing ill. Human infection causes fever, diarrhea, and abdominal cramps. Young children, elderly, and immunocompromised individuals can develop severe illness.
• Yersinia: A bacterial pathogen that can cause gastrointestinal illness and, less commonly, joint inflammation. Present in feces of infected dogs.

Bacteria from dog waste can survive in soil for days to weeks. In Fort Worth's summer heat, surface bacteria die faster — but soil bacteria persist longer due to the protective soil environment. The bacteria also travel: they're carried on shoes, on pets' paws, on children's hands. Regular waste removal limits the bacterial load in your yard's soil.

Dog Waste Health Risks to Other Pets

Your dog or cat can be exposed to pathogens in another dog's waste — and can re-expose your own dogs to parasites if the yard has accumulated waste from your own pets over time.

Canine parvovirus is shed in dog feces and can survive in soil and on surfaces for months to years. An unvaccinated dog or a puppy that hasn't completed their vaccination series can contract parvo from contaminated soil in your own yard if waste from an infected dog (even one that appeared healthy) was present.

Re-infection with intestinal parasites is a significant issue in yards where waste accumulates. You can deworm your dog, but if the yard has established roundworm or hookworm eggs in the soil, re-infection happens quickly through normal yard contact. Your vet may recommend deworming on a schedule, but without waste removal, the yard itself remains a perpetual source of re-infection.

Cats and neighborhood pets that access contaminated soil — through outdoor access, or through shared common areas — are at risk for the same parasites affecting dogs.

Who Is Most at Risk

While healthy adults typically handle most exposures without significant illness, certain groups are at meaningfully higher risk:

• Children under 5: Direct contact with soil, hand-to-mouth behavior, and less developed immune systems make young children the highest-risk group.
• Pregnant women: Some parasitic infections can affect fetal development. Regular waste removal in yards where pregnant women spend time outdoors is important.
• Immunocompromised individuals: Anyone with HIV/AIDS, undergoing chemotherapy, or on immunosuppressive medications is at higher risk for serious illness from pathogens that healthy adults handle without symptoms.
• Elderly adults: Reduced immune function with age increases susceptibility to bacterial gastrointestinal illness.

In Fort Worth's family neighborhoods — areas like Watauga, Hurst, Bedford, and Euless — multi-generational households are common. Grandparents spending time in the same yards as grandchildren represent exactly the combination of high-risk groups that most benefits from consistent yard cleanup.

The Key Insight: Soil Is the Long-Term Risk

The most important thing to understand about health risks from dog waste isn't the visible waste itself — it's what ends up in the soil. After waste decomposes and disappears visually, the parasite eggs and bacterial load it deposited in the soil remain. This is why "the yard looks clean" is not the same as "the yard is clean" if waste has been allowed to accumulate over months or years.

The parasite load in contaminated soil decreases over time once waste removal is consistent, but it doesn't reset instantly. A yard that has had consistent weekly cleanup for a year is meaningfully safer for children than one that gets occasional cleanup regardless of how it looks right now.

Regular, frequent removal — before eggs have time to become infective larvae, before bacterial load builds up in the soil — is the only way to manage this risk effectively.

A1 Scoop Warriors provides scheduled pet waste removal service across Fort Worth and 15 surrounding cities. Weekly and twice-weekly service keeps the yard ahead of the parasite lifecycle. Every visit includes a job report and text notification. No contracts.

Get your price — 60 seconds.

Frequently Asked Questions