A parasitic worm that infects and kills dogs has been found in California for the first time, a new study reports. The worm was discovered near the Arizona border on the banks of the Colorado River.
Dillman and colleagues began their survey of the Colorado River, which was described March 13 in the journal Pathogens, after LA County veterinarian Dr. Emily Beeler reached out to them about a local cluster of dog illnesses. Between 2018 and 2023, 11 dogs in three Southern California counties caught canine schistosomiasis, and one ultimately died of the infection.
By submitting your information you agree to the Terms & Conditions and Privacy Policy and are aged 16 or over.So Dillman and colleagues organized several trips to Blythe, a border town about an hour east of Joshua Tree National Park. The team searched for small, freshwater snails that serve as hosts for the parasite. H. americana worms infect these snails shortly after hatching, mature a bit and then get released into the surrounding water.
The team collected around 2,000 snails in all, and through DNA analysis, they found that a large percentage belonged to two species known to be worm hosts: Galba humilis and Galba cubensis.
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