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Dublin, Ireland – A recent study has revealed that park entrances in Dublin are significantly more contaminated with infective dog roundworm eggs than other areas within the parks, posing a potential health risk to visitors.
Researchers from Trinity College Dublin, led by Jason Keegan, conducted an analysis of soil samples from twelve parks across the city. Their findings, published in PLOS Neglected Tropical Diseases, highlighted that park entrances contained the highest concentration of Toxocara roundworm eggs. Playgrounds also showed a notable level of contamination, second only to entrances.
Toxocara are parasitic roundworms that commonly infect dogs and cats. Infected animals can shed eggs into the environment through their feces. Humans can become infected by accidentally ingesting these eggs, which can lead to a range of health issues, from mild symptoms to severe complications like eye infections.
The study specifically identified Toxocara canis, the common dog roundworm, as the predominant species found in the soil samples. Notably, the majority of the detected eggs were deemed potentially infective.
“Park entrances had the most Toxocara eggs, and most of these eggs likely came from dogs,” Keegan stated. “By providing signage, bins and a means to clean up after your dog in these locations, we could reduce the level of contamination. That’s the next step in the research.”
The researchers emphasized the need for increased preventive measures, particularly focusing on encouraging dog owners to properly dispose of dog waste at park entrances and playgrounds. They also advocated for regular monitoring of Toxocara egg levels at these sites to assess the effectiveness of these efforts.
To facilitate widespread monitoring, the study developed an accessible and affordable analytical method that could serve as a standardized approach, enabling comparisons between different locations and over time.
“This research highlights a critical public health concern,” said a spokesperson for the study. “By understanding where the highest risk areas are, we can implement targeted interventions to protect park users.”
The researchers hope that their findings will prompt local authorities and dog owners to take proactive steps in mitigating the risk of Toxocara infections.
Disclaimer: This news article is based on the provided research information and is intended for informational purposes only. It should not be considered medical advice. If you have concerns about potential exposure to roundworms or related health issues, please consult with a healthcare professional.(
More information: Jason D. Keegan et al, Park entrances, commonly contaminated with infective Toxocara canis eggs, present a risk of zoonotic infection and an opportunity for focused intervention, PLOS Neglected Tropical Diseases (2025). DOI: 10.1371/journal.pntd.0012917
