I've.never delt with flukes. I have.watched shows where people have injested meat etc and contracted them. They do not stay in the gut and can pass into other areas of the body. Now I don't know.if your chickens can pass it to you. But I can say as much as I have delt.with safeguard..all the various animals I have to give it to for worming....as much as I have had it on me...sprayed in my mouth and eyes from wrestling non appreciative animals....I've never had ill affects. Nor my Hubby who still eats the eggs. Fendabendazole family of drugs is even used on people who contract nasty parasites overseas. But it is your choice. ..you possibly could have no issues. I now the.dry sandy soil too well.. I'm in FL and have to worm often.