Science, Space and Technology News 2024
UC Riverside scientists have discovered the potentially fatal liver fluke parasite, Heterobilharzia americana, in the Colorado River in California, a first for the region. Originating from research on local canine infections, the finding highlights the unexpected presence of parasite-carrying snails. Dog owners are urged to be cautious and watch for symptoms of infection.
After learning about cases of the infection in local dogs, Dillman assembled a research team and headed to Blythe, a border town east of Joshua Tree National Park in Riverside County, where the sick dogs had all spent time swimming in the river.The infection is driven by the presence of a snail that transmits the worm. The research team collected more than 2,000 snails from the banks of the river. Aof snails that can support H.
“It gets into the veins of the intestinal lining, and that’s where it develops into an adult and mates,” Dillman said. “The presence of the adults in the veins isn’t the problem. It’s the eggs that get into the lungs, spleen, liver, and heart. The immune system tries to deal with it, and hard clusters of immune cells called granulomas form. Eventually, the organ tissues stop functioning.”
It is important to note that H. americana is not known to be capable of causing disease in humans. “It can cause swimmer’s itch, a red rash where it penetrates human skin. But it’s not able to cause infection,” Dillman said.
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