I’m not sure if geese are more prone to carrying parasites than chickens. I’d surmise it depends greatly on confinement and environmental conditions. I keep a flock of around 40-50 geese on 5 acres and have never had any problems in the 4 or so seasons I’ve kept them now. In any case, I googled goose worms and found this:
“There are a number of worms that can infest geese, but the two most troublesome are
gapeworm and
gizzard worm. Gapeworm gets into the throat and causes the bird to breathe harshly, cough and open and shut its beak in distress. Gizzard worm can also be very harmful. It burrows into the gizzard causing weakness, listlessness and loss of weight. (Suspect its presence if a young goose is sitting down a lot).
In young birds, death can follow quickly so vigilance is needed.
All worms can be treated with
Flubenvet mixed into the feed according to the manufacturer’s instructions. This is the only wormer which is licensed for use with all poultry and waterfowl. All incoming geese should be wormed as a matter of course, and then twice a year after that. Prevent worm build up by always providing plenty of fresh water, preferably on a mesh stand to prevent a mucky area building up. Keep the birds on fresh ground as much as possible, and during periods of confined conditions, ensure that they have plenty of clean, deep, dry straw or wood shavings.”
https://www.chickens.allotment-garden.org/keeping-geese/geese-diseases-parasites-worms-lice-mites/
