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Digenean flukes are part of a large and diverse group of parasites known as trematodes.

California killifish infected with a trematode flatworm, for example, are 10 times to 30 times more likely to become meals for birds than uninfected fish.

Collectively, trematodes make a significant proportion of killifish populations more readily available as meals for birds—effectively subsidizing those predators’ diets.

Take the trematode preying on the California killifish, a normally secretive bait fish that hangs out in western salt marshes.

Esvelt is also collaborating with tropical-disease specialist Paul Brindley of George Washington University in Washington DC to study the application of gene drive to wiping out schistosomiasis, a disease caused by parasitic trematode worms.