I know mine, at metzer farms, where for salmonella, but I don't know about anything else.
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Not sure how the worm issue got brought up, but Dandy is worm free for sure. They did poop tests on her at the vet a couple of weeks ago. I do go to feed stores, and I live in the country with farmers for neighbors. One of my good friends spends a lot of time around Dandy and she's often at her grandmother's who has wild ducks all around her place. I take Dandy with me to lots of places, mostly friends houses. Camping once, the park a few times etc. I can easily put on shoe covers to go to the feed store as infrequently as I go, but I can't monitor all of the foot traffic of all of the places she goes. She is strong and healthy though. I'll guess I'll see what the Avian vet recommendsSince you have a vet, take a stool sample in to be checked for worms. As Kikisgirls pointed out, herbal wormers do not work. Different worms need different types of wormers. Find out what your duck has, if any and address those. If she doesn't have them don't deworm. Be aware that you need to do 2 different samples, 2 weeks apart. The sample is checked for worm eggs, which are shed in cycles, so they don't always show up in just one sample.
How old is your duck? When you say you take her places, what kind of places? Do you go to feed stores or poultry shows or friends that have poultry houses, without her? Vaccines can be lifesavers, but they are not benign. They can cause reactions, and they do stress the immune system, and can put an already stressed animal over the edge. An adult animal in good health may not need vaccines, as it's immune system can resist many small challenges from viruses to create it's own "vaccine" You need to assess your birds risk factors (exposure) and decide if it is high enough to warrant vaccination. Supporting her immune system with good diet, probiotics, and addressing parasites, internal and external, can go a long way to her ability to fight disease.

You might ask the feed store which hatchery they use, and contact the hatchery to find out if they vaccinate, and for what diseases. She may already be vaccinated. The vet may also recommend additional vaccines, based on what she may not have had.I've bought tickets in the past that were vaccinated at the hatchery before sent, but not sure if Dandy was. I ordered her through a feed store to allow just 1 chick to be shipped and to increase safety with numbers. Also let me avoid the crazy shipping cost since it was in with their regular bulk order.
x2Herbal wormer will not rid a worm infestation.
That is a myth.
The worm issue got brought up by Christabub's comment on herbal wormers. Sorry, I got confused and thought it was you. Based on the places you take her, I would say her risk was higher than average. Vaccines may be warranted, I'm interested in what the avian vet says.