People, Dogs, Primates Share Parasites in Central Africa

Why this is here: Researchers identified the parasite S. fuelleborni in dogs for the first time, despite it being primarily known as a parasite of primates and humans.

Researchers from the Czech Republic analyzed fecal samples from people, dogs, and primates in the Dzanga-Sangha protected area of the Central African Republic. They used molecular methods to study genetic variants of Strongyloides roundworms, parasites affecting over 600 million people globally. The parasite infected 76 percent of people tested, 60 percent of dogs, and 59 percent of gorillas within the study area.

Analysis revealed some genetic variants appear in multiple host species, confirming close connections between humans and animals. Researchers noted particularly strong parasite sharing between people and dogs, likely due to dogs moving freely between villages and the forest. They also identified S. fuelleborni in dogs—a parasite previously known to infect primates, but not dogs.

Eliminating Strongyloides proves difficult, as treating humans alone is insufficient. A comprehensive approach considering relationships between people, animals, and the environment is necessary. The study appeared in Emerging Infectious Diseases, and work continues to understand these complex interactions.