I work in a exotic animal hospital as a vet tech ( I'm the one who looks at all of the poop) Its better if we can get a fresh sample, but with reptiles its difficult because you cannot use a fecal loop as you can with mammals. Make sure you keep the sample moist (don't let it dry out or get a dry sample) and you can put it in a ziplock baggie and stick it into your fridge and label it. It would be fine for a few days until you can get it there.
When we look at fecal samples we are normally only going to see eggs, and in some rare cases fully developed larva. The more poop you have the better the fecal flotation will be. We also do a fecal smear too. My clinic charges around 10 bucks a shot, but we do give discounts to people with alot (3 or more). You can also have your vet send the samples off to a lab so they can be 100 percent sure (but this is about 20-30 bucks).
Me bein the poop queen I am have learned to tell the difference between most species of intestinal parsite as well as mites and nematodes so we don't normally need to send off the samples. Regardless of the species, its normally treated the same way no matter what the species anyway, I just have an unatural fascination with looking at poo under a scope.
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4 Whites Treefrogs (Gleep, Gloop, Gazoo, and Mrs. Chubs)
1 Red Eyed Treefrog
2 Bearded Dragons (Butterfinger, B.B.)
2 Argentine Horned Frogs (Endeavor, Mcfatfat)
2 Betta Splendins
12 assorted freswater fish (and growing)
2 Koi (peppermint, mr. winkie)